I am trying to assess the quantitative impact of climate change on hydrological regime of a semi-arid subbain; and I can not select among different customary models.
please help me based on your knowlege and experience in water resources modeling.
SWAT? SWAT+? WEAP? HEC-HMS? IHACRES? or something else?
I suggest you base your decision on your goal and case study characteristics, looking at what people have done in the past and also at what kind of data is necessary to run each model. Is your catchment flat? How large is it? Do you want to work in a distributed or lumped way? Is it easy to represent the key hydrological processes or can they be neglected with confidence? What does people usually use in semi-arid regions like yours? Questions like these should help narrowing the choice set down
Thank you Andrea Galletti for your insightful response. you almost highlighted all the involved aspects.
The selection of a hydrological model should be dependent of the knowledge of the modeler, which mean modeler's should select a hydrological model based on his or her experience on the model. In addition the model selection depends on the objectives of the research to be conducted.
Zeinu Ahmed Rabba
Thank you for your suggestion, I will check its documentation. Does it have any specific advantage in hydrological modeling?
You can also check this page, brief description of different software and their abilities might help.
https://stormwater.pca.state.mn.us/index.php?title=Available_stormwater_models_and_selecting_a_model
SWAT is mainly preferred among the models asked in your list. The HEC_HMS model is usually selected for event-based modelings like simulating flood hydrographs or in the design of flood estimation. Since you are simulating for a continuous time period, SWAT is a better choice. It is a widely used model. One can even incorporate management and agricultural practices.
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