This section includes a brief overview of the Basin Modules examples included in the MIKE HYDRO Installation.
Demo
IrrigationFAO
IrrigationRice
WhiteNile
Demo_Aqua-Republica
This example can be viewed and executed with a demo license of MIKE HYDRO. In the getting started section, steps are described to build a similar setup.
This model shows an example of how to investigate the outcomes of different irrigation strategies in a field where different crops are cultivated.
The model includes three different crops: tree, tobacco and potatoes. The scope of such a model is to find the optimal irrigation strategy, which allows to obtain the maximum yield from each crop without spill of water and without incurring in water deficits.
Different irrigation strategies can be formulated by changing the trigger and application options for the crops, in particular the parameters TAW and RAW. This is done in the section Irrigation data ® Irrigation method. The new irrigation methods should then be applied to the crops in the Water user ® Irrigated Field section.
By changing these parameters, different irrigation scenarios can be run. A comparison of the results from the different simulations can be made to investigate how the different crops are affected by crop stress and in which scenario the maximum yield is achieved.
This model shows an example of rice crop irrigation. The model includes an irrigated field with three different rice crop shifts occurring during the year.
One of the applications of such a model is to investigate how the soil type properties affect the crop yield when growing rice. Different soils types have different effects on percolation. For example, a sandy soil allows a larger amount of water to infiltrate, if compared to a clay soil, which has a higher hydraulic conductivity, thus offering a higher resistance to infiltration. Deep percolation is responsible for a part of the water losses and can therefore deeply affect the water demand of the rice crop.
Different scenarios can be set up by changing the soil models. This is done in the section Irrigation data ® Soil and runoff. The key soil parameters to be varied are the three soil moisture content parameters and the saturated drainage coefficient. The different soils properties can then be assigned to the rice field in the section Water user ® Irrigated Field.
After running the models with different soil types, it is interesting to investigate how the irrigation demand varies when the field has different soil properties. The differences in percolation loss between the different simulation results can also be compared.
Other factors also affect the irrigation demand on the rice field. As done in Example 2, different irrigation strategies can be formulated by changing the trigger and application options for the crops, in particular the parameters TAW and RAW. This is done in the section Irrigation data ® Irrigation method. The new irrigation methods should then be applied to the crops in the Water user ® Irrigated Field section.
This example is a model of the White Nile river basin. It shows a more comprehensive river basin model as well as the utilisation of a coordinate system and background map.
This setup is a water resources model included in the installation with the overall intension for illustrating the possibility for using a MIKE HYDRO Basin model in connection with Serious Gaming for which DHI has developed the ‘Aqua Republica’.
The demonstration example includes a setup with 3 water users, 3 reservoirs and a number of catchments along river branches, and the setup forms the backbone of the demonstration model that can be accessed through the Aqua Republica webpage names as the ‘Danida version’.
Additional information on Aqua Republica is available on
THE ACADEMY by DHI’s homepage: http://theacademybydhi.com and on the Aqua Republica homepage: http://aquarepublica.com/.