pictures/imod_logo.png

iMOD User Manual version 4.4 (html)


6.10ISG Options

ISG-files contain all necessary information to simulate a river segment, such as: location, time dependent waterlevels, cross-sections, structures. iMOD supports functionalities that manipulate these ISG-files:


6.10.1ISG Configure

WHY?
ISG-files are used in iMOD to simulate the location of the surface water system.

WHAT?
ISG-files in iMOD represent line and point data that can be displayed in different ways.

HOW?
Select the menu option ISG Configure from the ISG-options menu in the Map menu to display the ISG Configure window. Or, use right-click anywhere on the canvas to open the popup menu. Select the option ISG-options and then choose ISG Configure.

ISG Configure window:

pictures/h4/image392.png

Settings

Not yet implemented

Apply colouring to:

The lines can be presented in a single colour or in different colours according a defined legend

Single colour

Select this option to display all lines with the same colour. The colour can be changed by clicking the Colour … button.

Apply legend to

Not yet implemented

Define Colouring
and Styles…

Select this option to display the Define Colouring and Styles window

Define Labels to
be plotted

Select this button to display the Select Label to be Printed window.
Not yet implemented.

Help…

Click this button to start the iMOD Help Functionality (if available in the selected *.PRF file).

Close

Select this button to apply the settings and close the IPF Configure window.


6.10.2ISG Show

WHY?
To show the location of point data of ISG-files.

WHAT?
ISG-files contain six types of point data which are connected to the river segments: nodes, segment nodes, cross-sections, calculation nodes, structures and QH-relationships.

HOW?
Select at least one ISG-file in the iMOD Manager and use the option Map from the main menu (or right click your mouse on the graphical canvas), choose the option ISG-options, and then ISG Show to list the following categories (see also next page)

Note: Colouring of all above mentioned attributes can be defined in the ISG Edit window.

Examples of the symbols used for all categories available in ISG-files:

pictures/h4/image396.png

pictures/h4/image399.png


6.10.3ISG Edit

WHY?
To add, delete or adjust interactively the line and point (attribute) data stored in an ISG-file.

WHAT?
The ISG Edit window has seven tabs:

The bottom part of the ISG Edit window shows the display settings of the segment attributes.

HOW?
Select at least one ISG-file in the iMOD Manager and use the option Map from the main menu (or right click your mouse on the graphical canvas), choose the option ISG-options, and then ISG Edit to display the ISG Edit window.

Note: In case, more ISG-files are selected in the iMOD Manager, prior to starting the ISG Edit option, iMOD will offer the possibility to merge all selected ISG-files into a single ISG-file.

Question window:

pictures/h4/image418.png

The example below shows how two different ISG-files would be merged into a single one.

Example of ISG’s of a primary and secondary surface water system

pictures/h4/image420.png pictures/h4/image419.png

Example of an ISG capturing the combined primary and secondary surface water systems

pictures/h4/image422.png


6.10.3.1ISG Edit window, Segments tab:

Use this window to select segment for modification, create new segments, delete existing segments and or start a variety of analyse functionalities, such as visuals of length-profiles, colouring of attributes on segments, rasterize parameters and so on.

pictures/h4/image400.png

Segment List

This list shows all the available river segments in the current opened ISG-file, e.g. 17.ISG. Select at least one river segment from the list to activate the Delete, Profile and ZoomSelect options. Moreover, a segment can be selected on the graphical canvas whenever the mouse is left-clicked near a Segment Node. A segment that is selected will be presented as a green line and can be edited moving your mouse on the line. Several options are available using the right-mouse button.

Example of a selected segment; (left) moving an existing node, (right) adding a new node:

pictures/h4/image404.png


pictures/h4/image385.png

Rename
Click this button the rename the selected segment point. The Give New Name: window will appear.

Give New Name window:

pictures/h4/renamesegment.png


pictures/h4/image405.png

ZoomSelect
Click this button to adjust the zoom level to fit the selected segments.


pictures/h4/image406.png

Attributes
Click this button to start the ISG Attributes window, see Section 6.10.3.9.


pictures/h4/image407.png

DrawSegment
Click this button to start drawing a new segment. On default, the name of the segment will be Segment{number}, it has two calculation nodes (one at the beginning and one at the end, that are both compulsory) and a single cross-section in the middle (one cross-section is compulsory for each segment).


Drawing a new segment:

pictures/h4/image408.png


pictures/h5/editnodesfrom.png

Connect Upstream
Click this button to select the upstream segment interactively, a Pipet cursors appears (  pictures/h1-h3/image133.png ) and any segment that is near your mouse position will be highlighted. Use your left mouse button to select the segment that need to be used from the upstream segment. Remove an entered upstream by clicking next to any of the segments. Terminate the selection process by the clicking the right or middle mouse button.


pictures/h5/editnodesto.png

Connect Downstream
Click this button to select the downstream segment interactively, a Pipet cursors appears (  pictures/h1-h3/image133.png ) and any segment that is near your mouse position will be highlighted. Use your left mouse button to select the segment that need to be used from the downstream segment. Remove an entered upstream by clicking next to any of the segments. Terminate the selection process by the clicking the right or middle mouse button.


pictures/h5/editnodestoauto.png

AutoConnect Downstream
Click this button select the downstream segments, automatically. iMOD avoids any recursive connections, so whenever the first point of a nearby segment is within the selected distance (Snap Distance) but it connects (in)direct to the selected segment, it is not used as a downstream segment. Eventually iMOD picks the nearest of all suitable segment within the Snap Distance.


pictures/h4/snapdistance.png

Snap Distance
Specify the distance for which streams will be connected whenever they are within this distance (meter). The nearest of all will be connected.


pictures/h5/isgdrip.png

Drip
Click this button to select all connected, downstream segments from the selected isg segments, automatically. iMOD select all connected segments from the initial selected segment.


pictures/h4/image409.png

ISG Search
Click this button to start the ISG Search window, see Section 6.10.3.11.


pictures/h4/image410.png

ISG-Rasterize
Click this button to start the ISG Rasterize window, see Section 6.10.3.13.


pictures/h4/image411.png

Profile
Click this button to start the ISG Profile window, see Section 6.10.3.12.


pictures/h1-h3/image149.png

Legend
Click this button to start the ISG Legend window, see Section 6.10.3.10.


pictures/h4/image412.png

Delete
Click this button to remove the selected river segment(s) from the current list of segments. You need to confirm this action. Unless the Save option is applied, the segment is removed from memory only.


pictures/h1-h3/polygon.png

Select in Polygon
Click this button to draw a polygon and select all segment inside the polygon. If at least one point of the segment falls within the polygon, the segment is selected.


pictures/h5/image523.png

Rotate
Click this button to flip the coordinates of the selected segment(s). The order of coordinates determine the flow direction in case the selected ISG is SFR compliant.

Segment#

The current segment number if displayed here.

Show Labels

Click the checkboxes for the attributes to be plotted.

Example of the Attributed to be plotted

pictures/h4/image416.png

Click on the specific input field Nodes, Seg.Nodes, C.Sections, Clc.Pnts, Struct, QH, Direction or Connection) to start the default Colour window in which the colour can be changed.

Show Selected

Check this checkbox to display the attributes as defined by Show for the selected segment(s) only.

Update

Click this button to redraw the ISG.

Single-
Double Precision

For the current ISG is displays the precision (single or double) of the current ISG. To save the current ISG in a different precision, select the appropriate option prior on saving.

Save

Click this button to save the loaded ISG to disc, using the original ISG-filename.

SaveAs ...

Click this button to save the loaded ISG by another filename.

Help ...

Click this button to start the Help functionality.

Close ...

Click this button to close the ISG Edit window. Whether you‘ve changed the ISG or not, you’ll be asked to confirm this.

Example of the Closing Window

pictures/h4/close_isg.png


6.10.3.2ISG Edit window, Polygons tab:

Use this window to enter polygon(s) for which selection and modifications need to be carried out for a variety of attributes of the ISG file.

pictures/h4/image424.png


pictures/h4/image425.png pictures/h4/image426.png pictures/h4/image427.png
pictures/h4/image428.png pictures/h4/image429.png pictures/h4/image430.png

Click one of these buttons to draw, open, save, delete, rename a shape and/or zoom into the selected shape(s). More detailed information can be found in Section 4.2.


6.10.3.3ISG Edit window, Attributes tab:

Use this window, to specify what attributes of the ISG file need to be modified and whether this need to be done for selected segments or within the entered polygons.

pictures/h4/image433.png

Action

Select the following options:

  • Remove:
    Click this option to remove all selected attributes that match the given search string;

  • Adjust:
    Click this option to adjust all selected attributes that match the given search string.

  • Export:
    Click this option to export all selected attributes to a CSV file that match the given search string.

Apply to

Select the following options:

  • Calculation nodes:
    Select this option to apply modification on attributes for calculation nodes, such water levels, inflow, stream widths;

  • Structures:
    Click this option to apply modification on attributes for structures, such as up- and downstream water levels;

  • Cross-Sections:
    Click this option to apply modification on attributes for cross-sections, such as widths, depth, Manning’s coefficients;

  • Q-Depth-Width:
    Click this option to apply modification on attributes for discharge-depth-width relation ships, such as discharge, width and depth values.

The appropriate tabs (more than one if needed) become available depending on the choice of your selection.

Wildcard (?*)

Enter a search string; e.g. Test* selects all labels that start with Test and end with anything; ??Test selects all labels that start with two characters followed by Test only.

Usage of wildcard
is case-sensitive

Select this checkbox to evaluate the search string as case sensitive.

Apply inside
selected polygon

Select this button to apply the removal or adjustment to the loaded ISG-file. Whenever at least one polygon is selected on the Polygons tab, the operation will affect attributes inside those selected polygons. If no polygons are selected, the operation will affect the selected segment on the Segments tab only. Bear in mind that all these adjustments are stored in the loaded ISG. A log file (LOG_SES.TXT) will be created and stored in the {user}\tmp folder. This file shows all adjustments to the ISG-file.

An example of the LOG_SES.TXT file:

pictures/h4/image434.png


pictures/h4/image435.png

Open SES-file
Click this button to open a Segment Edit Settings *.SES file for a more detailed description of this type of file see Section 9.23.


pictures/h4/image436.png

Save SES-file
Click this button to save the current settings on the Attributes tab to a Segment Edit Settings *.SES file. Whenever such a files has been saved, it can be used via the iMOD Batch function ISGADJUST (see Section 8.3.7).


6.10.3.4ISG Edit window, Calc. Points tab:

Use this window to specify what parameters need to be modified and how that need to be carried out. A maximum of four multiply (duplicate) parameters can be applied.

pictures/h4/image439.png

Extract from File
(*.CSV)

Select this option to read adjustments for all variables from a CSV File (see Section 9.13). The list of parameters depends on the type of ISG (see Section 9.9.2)

Assign

Select this option to specify adjustments for all variables separately.
Select the checkbox to activate a specific parameter. There is a maximum of four (duplicate) attributes to be modified at the same time. The list of parameters depends on the type of ISG (see Section 9.9.2).
Specify the kind of adjustment that manipulates the selected variable. Choose an operator from the dropdown menu:

  • • Select “=” to use the entered value;

  • • Select “+” to add the entered value;

  • • Select “-” to subtract the entered value;

    • Select “/” to divide by the entered value;

    • Select “*” to multiply by the entered value;

  • • Select “IDF” to sample a value out of the entered IDF-file at the location of the calculation point.


pictures/h4/image440.png

Open IDF
Click this button to open an IDF-file. This becomes available whenever the option “IDF” is selected from the dropdown menu for the type of operator.

Note: Adjustments to the number of calculation points can be made by the iMOD Batch function ISGSIMPLIFY (see Section 8.3.6).

Note: Adjustment to calculation points can be carried out by the iMOD Batch Function ISGADDSTAGES (see Section 8.3.9). This function is suitable of modifying water levels in the ISG via IPF files.


6.10.3.5ISG Edit window, Structures tab:

Use this tab to specify any adjustment for the up- and downstream water levels at structure, these are simple weirs.

pictures/h4/image442.png

Extract from File
(*.CSV)

Select this option to read adjustments for all variables from a CSV File (see Section 9.13). The list of parameters is described in Section 9.9.4.

Assign

Select this option to specify adjustments for all variables separately.
Select the checkbox to activate a specific parameter (“Up Waterlevel” and “Down Waterlevel”). There is a maximum of two (duplicate) attributes to be modified at the same time.
Specify the kind of adjustment that manipulates the selected variable. Choose an operator from the dropdown menu:

  • • Select “=” to use the entered value;

  • • Select “+” to add the entered value;

  • • Select “-” to subtract the entered value;

    • Select “/” to divide by the entered value;

    • Select “*” to multiply by the entered value;

  • • Select “IDF” to sample a value out of the entered IDF-file at the location of the calculation point.


pictures/h4/image440.png

Open IDF
Click this button to open an IDF-file. This becomes available whenever the option “IDF” is selected from the dropdown menu for the type of operator.


6.10.3.6ISG Edit window, Cross-Sections tab:

Use this tab to specify the modification on parameters for cross-section, such as Width, Depth and/or Manning’s coefficient (MRC).

pictures/h4/image444.png

Extract from File
(*.CSV)

Select this option to read adjustments for all variables from a CSV File (see Section 9.13). The list of parameters is described in Section 9.9.3.

Assign

Select this option to specify adjustments for all variables separately.
Select the checkbox to activate a specific parameter (“X (Width)” and “Z (Depth)” and “Manning’s Coefficient”). There is a maximum of three (duplicate) attributes to be modified at the same time.
Specify the kind of adjustment that manipulates the selected variable. Choose an operator from the dropdown menu:

  • • Select “=” to use the entered value;

  • • Select “+” to add the entered value;

  • • Select “-” to subtract the entered value;

    • Select “/” to divide by the entered value;

    • Select “*” to multiply by the entered value;

  • • Select “IDF” to sample a value out of the entered IDF-file at the location of the calculation point.


pictures/h4/image440.png

Open IDF
Click this button to open an IDF-file. This becomes available whenever the option “IDF” is selected from the dropdown menu for the type of operator.

Note: Cross-sections can be added also by the iMOD Batch function ISGADDCROSSSECTION (see Section 8.3.5).


6.10.3.7ISG Edit window, Q-Depth-Width tab:

Use this tab to specify the modification on parameters for the discharge (Q), -width (W) and -depth (D) relation ships. These can be used for ISG files that are compliant to the SFR packages, see Section 9.9.

pictures/h4/image447.png

Extract from File
(*.CSV)

Select this option to read adjustments for all variables from a CSV File (see Section 9.13). The list of parameters is described in Section 9.9.5.

Assign

Select this option to specify adjustments for all variables separately.
Select the checkbox to activate a specific parameter (“Discharge”, “Width ”, “Depth” and “Factor”. There is a maximum of four (duplicate) attributes to be modified at the same time.
Specify the kind of adjustment that manipulates the selected variable. Choose an operator from the dropdown menu:

  • • Select “=” to use the entered value;

  • • Select “+” to add the entered value;

  • • Select “-” to subtract the entered value;

    • Select “/” to divide by the entered value;

    • Select “*” to multiply by the entered value;

  • • Select “IDF” to sample a value out of the entered IDF-file at the location of the calculation point.


pictures/h4/image440.png

Open IDF
Click this button to open an IDF-file. This becomes available whenever the option “IDF” is selected from the dropdown menu for the type of operator.


6.10.3.8Dropdown menu

Once you have selected a segment by either picking it in the menulist in the Segments tab on the ISG Edit window, or alternatively by clicking your left mouse button at any segment node on the graphical canvas, the following options will be available whenever you press the right mouse button anywhere on the graphical canvas.

Dropdown menu:

pictures/h4/image449.png

Open Attributes …

Click this button to start the ISG Attributes window.

Add Cross-Section
Add Calculation Point
Add Structure
Add Q-Depth-Width Relationship

Click this button to add a Cross-section, Calculation point, Structure and/or Q-Depth-Width relationship to the selected segment. Click your left mouse button to add the attribute along the selected segment; depending on the type a icon will move along the segment. Click your right mouse button to cancel the operation.

Example of adding different attributes to a segment, (i) cross-section, (ii) calculation nodes, (iii) structure and (iv) Q-Depth-Width relationship:

pictures/h4/image452.png

Bear in mind that you cannot add additional calculation point, cross-sections whenever the ISG is compliant to SFR.

Delete Cross-Section
Delete Calculation Point
Delete Structure
Delete Q-Depth-Width Relationship

Click this button to delete a Cross-section, Calculation point, Structure and/or Q-Depth-Width relationship from the selected segment. Select the feature by moving your mouse in the neighbourhood of the feature and press the left mouse button. iMOD will select the feature that is nearest to the current location of the mouse. You need to confirm any delete action via a Question window:

Question window:

pictures/h4/image458.png

Bear in mind that the begin- and end calculation node may never be deleted and a single cross-section is at least obligatory for each segment.

Move Cross-Section
Move Calculation Point
Move Structure
Move Q-Depth-Width Relationship

Click this button to move a Cross-section, Calculation point, Structure and/or Q-Depth-Width relationship from the selected segment. Select the feature by moving your mouse in the neighbourhood of the feature and press the left mouse button. iMOD will select the feature that is nearest to the current location of the mouse. You need to confirm any move action.

Question window:

pictures/h4/image459.png

Start Segment Editing

Click this item to start editing the layout of the segment. Whenever in this mode, you can alter the location of each individual node of the segment. The method is similar as used for altering nodes for polygons, see Section 4.4. Until you select the option Save ISG Editing all modifications to the selected segment are not stored. You need to actively click the Save button on the ISG Edit window to save the modified segment on disc.

Delete Segment …

Click this item to delete the selected segment. You will be asked to confirm this delete operation.

Question window:

pictures/h4/image460.png

Reset Segment Editing

Click this item to restore the layout of the segment to that one prior to the moment that the option Start ISG Editing was selected.

Store Segment Editing

Click this item to store the current layout of the segment. Bear in mind that as long as the ISG has not been saved on disk using the option Save and/or SaveAs on the ISG Edit window, all changes are stored in memory only.

Quit Segment Editing

Click this item to quit the segment editing. Bear in mind that as long as the ISG has not been saved on disk using the option Save and/or SaveAs on the ISG Edit window, all changes are stored in memory only.


6.10.3.9ISG Attributes

All attributes that appear on segments, can be analysed and adjusted in the ISG Attributes window. Click the ISG Attributes button on the Segments tab on the ISG Edit window to open the ISG Attributes window.


ISG Attributes window, Waterlevels tab:

pictures/h4/image461.png

Calculation Point:

Select one of the listed calculation points from the dropdown menu. Any change in this dropdown menu will change the content of the underlying table and update the figure if possible.


pictures/h4/image462.png

Rename
Click this button the rename the selected calculation point via the Give New Name: window:

Give New Name window:

pictures/h4/image463.png

Save and Close
Click this button to store the changed name for the selected segment, the Give New Name: window will be closed.

Help
Click this button to start the Help functionality.

Cancel
Click this button to leave the name of the selected segment unchanged and close the Give New Name: window

Distance from
origin

This field displays the distance of the selected calculation point from the origin of the segment (FromNode) in meters.

Definition of
current
Calculation Point

This table shows the current values for the current selected calculation point. Use the slide bars to manoeuvre through the table and enter new values for any gridcell if desired. A new record can be entered by filling in all columns. They will be sorted by date automatically after you select the Redraw option. It depends on the type of ISG what attributes need to be available, see Section 9.9.2 for the exact content and meaning of variables.


pictures/h4/image464.png

Open CSV-file
Click this button to open a CSV-file, see Section 9.13 for more detailed information about CSV-files.


pictures/h4/image465.png

SaveAs CSV-file
Click this button to save to a CSV-file, see Section 9.13 for more detailed information about CSV-files.


pictures/h4/image466.png

Copy
Click this button to open the Copy Data from window.

Copy data from
window:

pictures/h4/image467.png

Apply
Click this button to copy the data from the selected calculation point onto the current calculation point and close the Copy data from window.

Close
Click this button to close the Copy data from window.


pictures/h4/image468.png

Redraw
Click this button to redraw the graphical display.


pictures/h4/image469.png

Calculator
Click this button to start the attribute calculator.

Attribute Calculator window:

pictures/h4/attribute_calc.png

Interpolate All between Nearest Up- and Downstream Entry
Select this option to interpolate all entries for the current selected feature (calculation node, structure nodes, cross-section) between the nearest up- and downstream equivalent.

Manipulate Single Entries
Select this option, to specify the parameter and modification for given start- end end dates.

Modify Parameter
Select one of the available parameters from the dropdown list. The content of the dropdown menu depends from which tab the Attribute Calculator is started. Select the appropriate modifier from the second dropdown list, choose from:

  • + Select this to add a value to all existing values;

  • - Select this to subtract a value to all existing values;

  • * Select this to multiply a value to all existing values;

    / Select this to divide a value to all existing values;

    = Select this to set a constant value to all existing values.

Enter an appropriate value in the right most entry field.

Apply within selected time-frame
Click this option to ensure that the modification will be applied within the entered time-frame that can be specified in the underlying entry fields.

From
Specify the date from which any modification will take place.

To
Specify the date to which any modification will take place.

OK
Click this button to modify the parameter as configured and close the Attribute Calculator window.

Help
Click this button to start the Help functionality.

Cancel
Click this button to close the Copy data from window.

Segment Name:

This field shows the name of the current selected segment.

Current value:

Select one of the attributes (WLevel, Bottom, Resistance, Inf.Factor) from the dropdown menu to be shown in the graph.

Current {}-value:

This field shows the current value in the graph at the position of the mouse cursor.

Save

Click this button to store any modifications and close the ISG Attribute window.

Help ...

Click this button to start the Help functionality.

Cancel

Click this button to close the ISG Attribute window. You will not be asked to confirm to take any adjustments made.


ISG Attributes window, Crosssections tab:

The ISG Attributes window, Crosssections tab can have two differences appearances. It depends on the usage of 1-D and 2-D cross-sections. A 1-D cross-section describes the bathymetry of a stream as a representation of a cross-section perpendicular to the direction ot the stream. A 2-D cross-section describes the bathymetry of a stream as a 2-D representation, a grid.

1D-representation

pictures/h4/isg_attributes_1dgrid.png

2D-representation

pictures/h4/image471.png

Crosssection:

Select one of the listed cross-sections from the dropdown menu.


pictures/h4/image472.png

Rename
Click this button the rename the selected cross-section. The Give New Name: window will appear (see previous page).

Distance from
origin

This field displays the distance of the selected cross-section from the origin of the segment (FromNode) in meters.

Definition of
current
Crosssection

This table shows the current values for the current selected cross-section point. Use the slidebars to manoeuvre through the table and enter new values for any gridcell if desired. A new record can be entered by filling in all columns. They will be sorted by date automatically after you select the Redraw option.
Column names within the table:
- DIST: Distance of the cross-section measured from the centre of the riverbed (minus to the left en positive to the right).
- Z: Relative level of the riverbed (meter), whereby zero will be assigned to the lowest riverbed level
- MRC: Manning’s roughness coefficient (-).


pictures/h4/image473.png

Open CSV-file
Click this button to open a CSV -file, see Section 9.13.


pictures/h4/image474.png

SaveAs CSV-file
Click this button to save to a CSV-file, see Section 9.13.


pictures/h4/image475.png

Copy
Click this button to open the CopyAttribute window.


pictures/h4/image476.png

Redraw
Click this button to redraw the graphical display.


pictures/h4/image477.png

Calculator
Click this button to start the attribute calculator.

1D

1D representation
Click this button to view the 1D cross-section coupled to the cross-section point.
The following 3 options are only available in combination with the 1D cross-section representation:

Symmetric

Click this checkbox to determine a symmetric cross-section and compute the area that belongs to it.

Trapezia

Click this checkbox to determine a double multiply trapezia that represents the area computed by the symmetric cross-section most optimally.
Example of a symmetric cross-section, green is the original cross-section, red the symmetric one:
pictures/h4/image478.png pictures/h4/image479.png

Simplified

Click this checkbox to determine an eight-point cross-section. This option is used for an SFR compliant ISG file during the creation of the SFR package, see Section 12.28.

pictures/h4/cross-section.png pictures/h4/simplified_cross-section.png

2D

2D representation
Click this button to view the 2D cross-section coupled to the cross-section point.
The following options are only available in combination with the 2D cross-section representation:


pictures/h72-end/image993.png

Add/adjust Cross-section point
Click this button to add or adjust a specific cross-section point. The following window will be opened:

Two-Dimensional Cross-section window:
pictures/h4/isg_2d_adjust_add.png

Cross-Section:

This value shows the number of the cross-section point.

Bathymetry Pointer:

Enter the name of an IDF-file describes the spatial distribution of two- dimensional cross-sections.

Bathymetry (z-values):

Select the name of an IDF-file that describes the bathymetry for the riverbed.

Apply a
reference
height…

Select this option in case both negative and positive values in the bathymetry pointer IDF-file needs to be taken into account at a certain reference level in assigning cross-sections.

Referenceheight (z-values)

Select the name of an IDF-file that describes the reference height for which positive and negative pointer values given at Bathymetry Pointer need to be applied. A single value is obtained per 2-D cross-section.

Apply a Resistance map

Select this option to insert a spatial variable resistance value for the bathymetry of the 2-D cross-section.

Resistance Values (c-values)

Select the name of an IDF-file that describes the resistance value for the 2-D cross-section. This is an integer multiplication factor with a maximal value of 256.


pictures/h4/ISG_editattrib.png

Edit Cross-Section grid
Click this button to view and edit the cross-section grid related to the selected cross-section point. This option will open the following window:

IDF Edit Table window:
pictures/h4/isg_attributes_edit_2dgrid.png

Colour columns…

Select this option when coloring the grid cells by the given legend is preferred.

Column width

Click on this button to refresh the column width with the value given in de box to the right of this button.

Note: Cross-sections can be applicable for different sections on a segment. It depends whether it is a one-dimensional cross-section or a two-dimensional one.


ISG Attributes window, Structures tab:

Use this tab to enter information on structures.

pictures/h4/structures.png

Structure:

Select one of the listed structures on the current segment from the dropdown menu.


pictures/h4/image462.png

Rename
Click this button the rename the selected structure point. The Give New Name: window will appear.

Distance from origin

This field displays the distance of the selected structure point from the origin of the segment (FromNode) in meters.

Definition Structures

This table shows the current values for the current selected structure point. Use the slidebars to manoeuvre through the table and enter new values for any grid cell if desired. A new record can be entered by filling in all columns! They will be sorted by date automatically after you select the Redraw option.


pictures/h4/image464.png

Open CSV-file
Click this button to open a CSV-file, see Section 9.13 for more detailed information about CSV-files.


pictures/h4/image465.png

SaveAs CSV-file
Click this button to save to a CSV-file, see Section 9.13 for more detailed information about CSV-files.


pictures/h4/image466.png

Copy
Click this button to open the Copy Data from window.


pictures/h4/image468.png

Redraw
Click this button to redraw the graphical display.


pictures/h4/image469.png

Calculator
Click this button to start the attribute calculator.

Value boxes on the top-right

These fields shows the current value in the graph at the position of the mouse cursor.


ISG Attributes window, Q-Depth-Width tab:

Use this tab to enter information on Q-Depth-Width relationships. This information is used for SFR compliant ISG files.

pictures/h4/qh.png

Q-Depth-Width:

Select one of the listed Q-Depth-Width relation points from the dropdown menu.


pictures/h4/image462.png

Rename
Click this button the rename the selected Q-Depth-Width relation point. The Give New Name: window will appear.

Distance from origin

This field displays the distance of the selected Q-Depth-Width relation point from the origin of the segment (FromNode) in meters.

Definition Q-Depth-Width Relationships

This table shows the current values for the current selected Q-Depth-Width Relationships point. Use the slidebars to manoeuvre through the table and enter new values for any grid cell if desired. A new record can be entered by filling in all columns!


pictures/h4/image464.png

Open CSV-file
Click this button to open a CSV-file, see Section 9.13 for more detailed information about CSV-files.


pictures/h4/image465.png

SaveAs CSV-file
Click this button to save to a CSV-file, see Section 9.13 for more detailed information about CSV-files.


pictures/h4/image466.png

Copy
Click this button to open the Copy Data from window.


pictures/h4/image468.png

Redraw
Click this button to redraw the graphical display.


pictures/h4/image469.png

Calculator
Click this button to start the attribute calculator.

Value boxes on the top-right

These fields shows the current value in the graph at the position of the mouse cursor.


ISG Attributes window, Coordinates tab:

Use this tab to display the coordinates of the selected segment, read in a different set of coordinates and/or switch the order in which the coordinates are entered.

pictures/h4/coordinates.png

Coordinates of
current
Segment

This table shows the current coordinates of the reaches in the current selected segment. Use the slidebars to manoeuvre through the table and enter new values. A new record can be entered by filling in all columns! Note iMOD uses the numeric format “F15.3” to display the coordinates. It is therefore not possible to enter more than 3 digits and/or more than 15 numbers in total. If this happens, “****” will appear. iMOD continues whenever a correct value is entered again.


pictures/h4/image464.png

Open GEN-file
Click this button to open a GEN-file, see Section 9.11 for more detailed information about GEN-files.


pictures/h4/image465.png

SaveAs GEN-file
Click this button to save to a GEN-file, see Section 9.11 for more detailed information about GEN-files.


pictures/h5/image523.png

Rotate
Click this button to rotate the coordinates. The order of the coordinate determines the flow direction whenever this type of ISG is used for the SFR package, see Section 12.28.

Value boxes on the top-right

These fields shows the current value in the graph at the position of the mouse cursor.


6.10.3.10ISG Colouring

Use this functionality to visualize the parameters on the ISG file as lines, so colouring the individual lines according a specified legend. Click the Legend option (  pictures/h1-h3/image215.png ) on the ISG Edit window to display the ISG Colouring window.

ISG Colouring window:

pictures/h4/legend_isg.png

Note: At the start of the ISG Colouring window the legend for all parameters are initialised based on their minimal and maximal values.

Current Selection

Select this option to colour segment from the current selection only.

Current Window

Select this option to colour all segments disregard whether they are selected.

Period

Use this trackbar to select a different period that is available in the dropdown menu with Existing Dates/Times. This option is disabled whenever a single date/time step is available.


pictures/h1-h3/image215.png

Legend
Click this button to start the Adjust Legend window in which the legend for the current Topic can be modified. Those modified legends will be stored as long as the ISG Colouring window remains active. Whenever the window is restarted, all legend will be initialised again.


pictures/h4/number_of_columns.png

Number of Columns
Enter the number of columns to represent the legend.

Existing Dates/Times

Select one of the existing dates/times from the dropdown menu. This option is disabled whenever a single date/time step is available.


pictures/h5/image581.png

Complete Backward
Click this button to go the first existing date and move the trackbar to the utmost left.


pictures/h5/image583.png

Backwards
Click this button to step a single date step against time, repeatedly. The trackbar moves accordingly.


pictures/h5/image584.png

Stop
Click this button to stop the actions Backwards or Forwards.


pictures/h5/image585.png

Forwards
Click this button to step a single date step in time, repeatedly. The trackbar moves accordingly.


pictures/h5/image587.png

Complete Forward
Click this button to go the utmost existing date and move the trackbar to the utmost right.

Topic

Select one of the existing topic from the dropdown menu to display. The amount of topics depend on the type of ISG (see Section 9.9.2).

Thickness

Select one of the existing line thicknesses to display the lines.

Type

Select one of the existing line types. The following line types are available:

  • • SolidLine;

  • • Dotted;

  • • Dashed;

    • DotDash;

    • DotDotDash;

  • • LongShort;

  • • ShortDash;

    • LongShortShort.

Help ...

Click this button to start the Help functionality.

Close

Click this button to close the ISG Colouring window.

Note: All other functionalities of ISG Edit remain active whenever the ISG Colouring window is active.


6.10.3.11ISG Search

Each segment and their attributes (Cross-sections, Calculation nodes, Structures and Q-Depth-Width Relationships) have labels. WithISG Search it is possible to search segments for specific labels in their segment and attributes. Click the ISG Search option from the ISG Edit window to start the ISG Search window.

ISG Search window:

pictures/h4/image482.png

Number:

Select this option to enter a segment number to search for explicitly.

Name:

Select this option to enter a search string. Use the asterix (‘*’) as wildcard and the questionmark (‘?’) to define the number of positions. e.g. Ex_* means, select all that match the Ex_ at the start and a search string of ??Ex_* means that all are selected that start with two characters prior to Ex_.

Case Sensitive

Click this checkbox to make the search string case sensitive.

Search within:

Select those variables for which the search string will be applied to in order to find those segments that yield a match.

Get Them

Click this button to apply the search string for the selected variables.

Results
Segments:

The menulist displays all segments that meet the entered search string.

Take Them

Click this button to take the selection to the mainISG Edit window.

Help …

Click this button to start the Help functionality.

Close

Click this button to close the ISG Search window.


6.10.3.12ISG Profile

Click the menu option Profile from the ISG Edit window to display the ISG Profile window. A length-cross section is presented for the selected ISG segment.

ISG Profile window:

pictures/tutorial10/profile.png

Profile along
Selected
Segments:

Select one or more segments from the menu list to visualize their length profile. Use your mouse wheel to switch quickly between segments.

Existing Dates:

Select an available date from the dropdown menu to visualize any of the selected items at Polygon A: and Polygon B: for the selected date.


pictures/h4/image484.png pictures/h4/image485.png pictures/h4/image486.png pictures/h4/image487.png pictures/h4/image488.png

Zoom functions: see Section 2.6.2 for an explanation

Graphical
display

In the graphical display the profile along the selected segment is presented. In cyan, any parameters at Polygon B: is presented, in brown the parameter from Polygon A:.

Mouse Position

Displays the current position of the mouse in units of the display.

Plot:
Calc. Pnts
Cross-Sections
Structures
Q-Depth-Width

Click one of the checkbox next to those keywords to display the position of these in the graph.

Order for Connections

Click this keyword to sort the individual segment based on their connections. Segments can be randomly sorted in the segment list and can distort the graphical presentation whenever the graph of the individual segments is not in the correct order. This option sorts them before plotting.

Help …

Click this button to start the Help functionality.

Close

Click this button to close the ISG Profile window.


6.10.3.13ISG Rasterize

For reasons of visual inspection (are all water levels correct?) as well as usage in a runfile (see runfile description), iMOD can perform a rasterization of the ISG-file in total or for individual river segments within the ISG-file. It yields several IDF-files (STAGE.IDF, BOTTOM.IDF, INFFCT.IDF and COND.IDF) that can be used and analysed using the standard iMOD functionalities.

Note: IMPORTANT to note is that a minimal resistance is applied of 0.001 days to avoid extraordinary conductance (COND) values.

Click the ISG Rasterizepictures/h4/image489.png ) button in the ISG Edit window to start the ISG Rasterize window.

ISG Rasterize window, (top) for a Steady State configuration for the Current Selection and (bottom) for a Transient configuration for the Entire ISG:

pictures/h4/image490.png pictures/h4/image491.png

Dimension

Select one of the following options:
Current window:
Click this option to rasterize all river segments within the current graphical zoom level.
Entire ISG:
Click this option to rasterize all river segments in the entire ISG.
Current Selection:
Click this option to rasterize the selected river segment(s) only.

Give CellSize
(meter)

Enter the cellsize (meter) of the resulting IDF after the rasterization.

Period

Select one of the following options:
Steady:
Click this option to rasterize all time variant input variables (e.g. water levels, bottom levels, infiltration factors, riverbed resistances, weir levels) as mean values over all input.
Transient:
Click this option to rasterize all time variant input variables as mean values over the selected period that can be entered in the input fields at the right.

Minimal
water depth …

Enter a minimal water depth (meter) to be used when computing conductances, which in principal depends on water depth. By entering a minimal water depth \(>\) 0.0, the conductance will never become zero.

Give postfix …

Enter the postfix to be added to the default names after the rasterization, e.g. iMOD_ yields the IDF-filename iMOD_STAGE.IDF

Compute
influenced
waterlevels
by structures

Check this item to compute the water level as it is influenced by a weir structure. Upstream from each weir the water level is horizontal until it reaches the level of the river plus water depth. From there the waterlevel follows the gradient of the river segment.

OK …

Click this button to open the ISG Rasterize Info window.

Example of the ISG Rasterize Window

pictures/h4/image492.png

Select IDF-File:
Select one of the listed IDF files that are present in the iMOD Manager to used their grid dimension.

X-min/X-max
Enter the minimum and maximum X coordinates. On default these are filled in depending on the chosen Dimension on the ISG Rasterize window.

Y-min/Y-max
Enter the minimum and maximum Y coordinates. On default these are filled in depending on the chosen Dimension on the ISG Rasterize window.

Columns/Rows
Computed number of columns and rows that the yielding IDF-files receive.


pictures/h4/image493.png  Calculator
Click this button to recompute the number of columns and rows.

Estimated FileSize
Display of the filesize in Gbytes.

Following IDF Files will be created
This shows a list of all IDF-files that will be created by the rasterization, together with a brief description. The list depends on the choices made on the ISG Rasterize window.

OK
Click this button to start the rasterization. After successful rasterization, both theISG Rasterize and ISG Rasterize Info window will be closed. All resulting IDF-files will be added to the iMOD Manager.

Help ...

Click this button to start the Help functionality.

Cancel

Click this button to close the ISG Rasterize Info window and to return to the ISG Rasterize window.

Help …

Click this button to start the Help functionality.

Cancel

Click this button to close the ISG Rasterize window.