Answer. When you start the execution of a task block then the task block will color purple, which means that the task is active. After some time, the task block may color yellow or green. When it is yellow it means that one or more of the executed programs detected an error. When the task block is green then the executed programs executed correctly. You can check the error message and other progress messages in the log-file of the various programs as follows.
Click on the right mouse button while the cursor is on the task block
Depends on the task block:
A menu will pop-up with an item Log info (e.g. at task block Edit network and data base from map ) for each program. You can directly view the log file of the executed program.
Select Log menu item
View the log file of the executed program ().
Figure 4 Viewtext screen : example log-file.
Answer. When you get errors after you have created or updated a network schematization you can carry out the following actions to find the cause:
Figure 5 Network editor Netter settings window under menu item Options > Options.
Answer. RIBASIM simulates on a monthly, half monthly, decade (10 daily), weekly or daily basis. When you start a new application then the time step size is a month which is the default time step. This means that the time step dependent model data, like the irrigation demand of the fixed irrigation nodes, must be specified for each month. You can check the actual simulation time step as follows.
Click on the right mouse button while the cursor is on the task block Select hydrology and water quality scenario
The Fixed data main menu will pop up ().
Click on menu item Simulation time step
The Fixed data menu for the simulation time step setting will pop up ().
Click on the first menu item Simulation time step data
The fixed data for the definition of the simulation time step, file Timestep.dat, will be shown ().
You can also directly view the time step definition file Timestep.dat under Windows explorer. The file is stored in the Fixed sub-directory of your basin Rbn-directory, for example for model with name Virgin this file is stored in the directory \Virgin.rbn\Fixed.
You may change the simulation time step as well. The procedure is outlined at the next FAQ 4.4.
Answer. Best moment to define and set the simulation time step is when you start with your application. The defined simulation time step determines the time step dependent model data, thus when you set the simulation time step on monthly then you must specify 12 values for data like the irrigation demand of fixed irrigation nodes. The procedure to set the simulation time step is as follows:
Click on one of the Set simulation time step menu item.
At the background the simulation time step definition file Timestep.dat is set.
Click on the first menu item Simulation time step data to verify the time step setting.
The fixed data for the definition of the selected simulation time step, file Timestep.dat, will be shown ().
Basically, any simulation time step definition can be simulated by RIBASIM but in the Fixed data menu system the definition of the Christian and Shamsi calendars for 12, 24, 36 and 53 time steps are included as those time steps are the most commonly used.
Normally RIBASIM simulates on the defined monthly, half monthly, decade or weekly time step unless you specify that you want to simulate daily. You can switch the daily simulation option on at the task block Specify simulation control data (see Figure 9).
Answer. Yeas you can. You can switch the daily simulation option on at the task block “Specify simulation control data” (see Figure 10).
Answer. Yes. RIBASIM considers leap years. The length of each time step in days is specified in the time step definition file e.g. the one shown for Christian monthly time steps (Figure 11) and you specify as well for which time step an extra day must be added for leap years. When you create a daily hydrological time series then you must include this extra day for leap years.
Answer. All simulation results are stored in a result file per type of node e.g. the fixed irrigation node results are stored in the file Fixirrig.his. The file type is always “His”. You can make graphs and export all RIBASIM results using the program Ods_View available under the “Results : on chart” menu item. Two procedures for the export of results in the His-files can be used. The first procedure is by making a graph of the results and next select the menu item “Copy data to Clipboard (Paste in Excel)”. See Figure 12. The second procedure is under Ods_view where you have to export the results to a Csv-file (comma separated values). The Csv-file can be opened under Ms Excel outside RIBASIM and data can be converted to columns.
Double-click the task block “Analysis of basin simulation results”.
Case Management Tool screen with pop-up menu box “Analysis of basin simulation results”.
Click on item “Results : on charts”.
Case Management Tool screen with pop-up menu box “Results on charts”
Click the menu item All links
OdsView selection screen (Figure 13).
Select parameter Link Flows
Select one or more locations
Select several time steps
Press Export data button
“Save as” pop-up box to specify the file name and file type of the export file (Figure 14).
Browse to your actual export directory to store the export file e.g. directory Results or Myresults:
Select the export file type “Comma separated value Files (*.csv)”
Type the export file name.
“Save as” pop-up box with directory, file name and file type of export file.
Press Save button
The export file is created. OdsView selection screen is shown again (Figure 13).
Press Exit button
Close OdsView. Case Management Tool screen is shown.
Close pop-up menu box “Results on charts”.
Close pop-up menu box “Analysis of basin simulation results”. Return to Case Management Tool screen.
Answer. You can renumber all nodes and links under RIBASIM task block “Edit network and data base on map” menu item “Renumber nodes and links”. RIBASIM offers 3 numbering options which can be set at menu item “Edit node and link renumber option data”. The differences among the options are outlined in the User manual.
Answer. You can rename the nodes and links one by one with the network design tool Netter at the task block “Edit network and data base on map” and menu item “Edit network and object data”. When the network editor Netter has started, select the “Edit Network” button at the top bar and select the operation “Rename” in the node or link operation menu. The name of the node or link is shown in popup window if you point to a node or link. You can change the name in the popup window.
An alternative way is to rename all nodes and links in one batch run. In this case you must use the RIBASIM utility program “RenameNt” which is provided with the software in the directory “Utility programs”.
Answer. If you enter model data in the Dataedit spreadsheet table for example for the demand of the fixed irrigation node you enter the value 12.45 and the decimals are not recognized then the Windows “Regional settings” of your computer are not set correct. The Decimal Symbol must be a point (.) e.g. the US setting and the Digit grouping symbol can be a comma (,). See FAQ 1.5.
Answer. RIBASIM contains the utility Case Analysis Tool (CAT) with which you can compare and combine the results of various simulation cases. The requirements are:
The utility is available at the RIBASIM title screen Icon gallery at icon “Open and analyse”. Below the procedure to generate a combined graph of the flow in the most downstream link of our Virgin river basin for the Base case and the Scenario A case.
Before you start the exercise below you should first run and save the complete simulation “Base case” for the time period January 1971 till December 1980.
Double-click the icon “Open and analyse” at the icon gallery.
Pop-up window for selection of existing basin appears (Figure 15).
Select the name of the basin “Virgin” at the pop-up window.
The initial Case Analysis Tool CAT screen appears (Figure 16).
Click on “Scenario A case”
Click on “All link flows”
CAT screen with the first case and file selected (Figure 17).
Click on “Base case”
CAT screen with the second case and file selected (Figure 18).
Click on folder “Locations”
Click on “Link3”
Click on the Right arrow key
CAT screen with the selected link in the right window (Figure 19).
Click on folder “Parameter”
Click on “Link flows (m3/s)”
CAT screen with the selected parameter in the right window (Figure 20).
Click on the “Graph” icon at the Output icon gallery
Graph of the flow in the selected link for the Base case and the “Scenario A case” (Figure 21).
Answer. With a flow composition computation, you can trace the water of the various sources thru the river basin network. You can make 2 types of flow composition computations:
Type 1 : the flow components are the default flow components.
Type 2 : the flow components are defined by the user.
If you want to do type 1 “Default flow components” then you only have to switch on the item “Flow composition (default)” at the task block “Specify simulation control data” (see Figure 22).
If you want to do type 2 “User defined flow components” then you must:
Answer. It might occur that you get error messages while designing and saving your river basin network schematization under the network editor Netter. The cause is that your network is not complete or not correct. Some common mistakes are for example that you have added 2 nodes on the same location (because you pushed twice the left mouse button) or the flow direction is incorrect or you are not using the right link types at diversion and bifurcation nodes. To find out what is wrong some suggestions for further actions:
Answer. The source priority list is automatically generated when you save your new or updated river basin network schematization. If this was not done well and an error was generated referring to the source priority list then the following actions could be carried out to solve this problem:
Push the “Generate” button at the window of the source priority list editor. See Figure 23 . The source priority list is generated.
Answer. The simulation sequence is the downstream order of the nodes in which they are processed in RIBASIM. It is automatically generated when you save your new or updated river basin network schematization. If this was not done well and an error was generated like:
Error from sub Yseq :
Number of nodes in the simulation sequence (= 5)
is less than number of nodes in the network (= 46)
Check simulation sequence
The following actions could be carried out to solve this problem:
Answer. Yes. You can run several simulation cases in batch mode at the Case Management Tool. You must carry out the following actions:
Choose menu item: Case > Close All task blocks will become grey.
Select the cases to run in batch mode (push CTRL- button for selection more than 1 case) > OK. An example view:
Select the task block “River basin simulation” to run in batch mode
Choose menu item : Case > Run Batch The cases will run one after another and at the top of the screen a pop-up progress message screen appears. Example view:
Answer. Yes you can. If you want to make a large number of runs for a RIBASIM model outside the standard user interface in a self-designed batch mode or combine RIBASIM with other components then this can be easily implemented. An example batch setup has been provided with the RIBASIM Version 7.01.21 software. You can mail to Ribasim.info@Deltares.nl for the latest info.
Answer. The message may appear when you are making your selections at the program Ods_view on parameter, location and time steps at the “Results on Chart”. See Figure 24. You can avoid this warning as follows: at program Ods_view menu item “Options” > Switch off option “Warn for non-equidistant time steps”