# iMOD User Manual version 4.4 (html)

#### 5.5iMOD Project Manager

The files needed in a model simulation are defined in the iMOD Project Manager. On the menubar click View and then choose the option iMOD Project Manager to open the corresponding window.

The iMOD Project Manager window shows a list of all possible model input topics. iMOD saves the characteristics in a project file, a so called *.PRJ file. From a project file a runfile (*.RUN) can be generated that will be used in the model simulation, see Section 7.9 or a standard MF2005 configuration can be save (*.NAM), see Section 5.5.5. Moreover, a runfile can be read and used to write a *.PRJ file. During the creation of a model configuration (*.RUN or *.NAM), it is possible to change the number of model layers and/or the time characteristics of the simulation, e.g. the begin and end time and/or sizes in stress-periods and/or the configuration of packages.

iMOD Project Manager window:

Initially:               After reading a project (*.PRJ) file:

Note: The Project Manager does not yet support the PKS package.

Note: For transient (time variant) topics, individual stressperiods (specific dates and/or periods) can be assigned to packages as a whole. They become accessible in the iMOD Project Manager. Those (and time invariant topics) may contain more than one levels (subtopics) of necessary input, such as ANISOTROPY that consists of FACTORS and ANGLES and DRAINAGE that consists of CONDUCTANCE and DRAINAGELEVEL. Use the Define Characteristics Automatically button (   ) option to efficiently configure the time variant model input and/or multi-layered input.

Anisotropy with more subtopics:     Drainage/Constant Head with time variant information:

##### 5.5.1Define Characteristics

The Define Characteristics  ) option of the iMOD Project Manager window opens a window which enables to define the characteristics of the model input topics as described below. Note: Whenever the PST package is selected a dedicated window is displayed (see Section 5.5.2).

Note: Packages are assigned to a particular date and time at which they start. They will never end, but can be overruled by another packages that is defined ahead of them. In the following figure it is explained what this means whenever more packages become available and interact whenever periods are defined.

In the figure shown above, a) describes the situation in which only a single package T$_1$ is defined half-way a simulation between Start and End. In b), another package T$_2$ is defined and overrules T$_1$ at the start of T$_2$. In c), a third package T$_3$ is defined before T$_1$ and even before the start of the simulation. Consequently, the package T$_3$ becomes active, directly at the start of the simulation. In d), a period P$_1$ and P$_2$ are defined at a certain moment within a single year, they will be repeated for each year, automatically. Finally, in e) a package T$_4$ is defined besides the period definitions P$_1$ and P$_2$. As a consequence, the package T$_4$ will split period P$_1$ halfway, up to the moment period P$_2$ is defined again.

##### 5.5.2Parameter Estimation

Parameter Estimation Settings window:

Within the Parameter Estimation Settings window it is possible to configure the settings for a parameter estimation. Several options are available, such as defining the main settings, the number and characteristics of parameters, the zones and measurements, see section Section 12.33 for more detailed information on parameter estimation. Most of the parameters are described in more detail in section Section 10.14 as well.

##### 5.5.3Define Characteristics Automatically

The Define Characteristics Automatically  ) option on the iMOD Project Manager window opens a window which enables to define the characteristics of the model input topics in a more advanced way than the default Define Characteristics window (see Section 5.5.1). The process consists out of two steps. In the first step you define the characteristic of the source for each topic, in the second step iMOD will list the found sources and it is possible to modify this list manually before adding them to the Project Manager window.

###### 5.5.3.1Define Source for Topics

The first step is to define the type of sources for each topic.

###### 5.5.3.2Modify List of Topics

The second step is to inspect the list of found files based on the given sources for each topic.

##### 5.5.4Define Periods

A period is defined by a starting date and time for which a package, assigned to that period, will be repeatedly included in the runfile. A period start at a particular moment in time, but it will never end repeating itself. The only way of ending a package defined by a period, is by defining another package after or equal to the starting date of the period.

Define Periods window:

##### 5.5.5Define Simulation

Define Simulation window:

Within the Define Simulation window it is possible to configure the runfile and/or standard Modflow2005 configuration files. Several options are available, such as defining the location and size of clip models, time-discretisations and active packages.