SWAT model is best, because it used so many input variables such as Temperature , Rainfall, Relative humidity , Solar radation, wind speed, Soil, LULC , Slope and DEM and give results based on physical and conceptual for each sub watersheds.
Thank you for your excillent answer, Now there is several options, accoording to our interst we can used those data in the HEC-HMS 4.10 model too.
Thank you for your for your answer, If you have any paper to compare the peak flood with HEH HMS and SWA, please share me.
Thank you
The HEC-HMS model is a lump-based model, while the SWAT model is a semi-distributed model. Lump-based models consider the total basin as a “single homogeneous element".
Dear Tirtha,
As previously mentioned, SWAT can use more input data (topographic data, soil properties, and land use/land cover data) that are not necessarily needed in HMS.
Also, SWAT can simulate higher spatial resolutions and finer time steps (smaller than daily, which is HMS's smaller time-step I believe).
So, if you have a lot of data avalable and you seek detail, stick with SWAT. If you have a less complex, smaller scale project (and perhaps less modelling experience), then HEC-HMS may be the best option.
Dear Angelos,
Thank you so much for your kind feeling, I have kiept up you as a expert sussegistion.
Tirtha Raj Adhikari
As it has explained in previous messages. The HEC-HMS is the lumped model and the SWAT is the semi-distributed model. The lumped model used the one value/homogeneous for the whole area while the SWAT is the physically based semi-distributed model and it assign the single discrete value to each sub-basin and the sub-basins can also be increase/decrease based on the user. There are a number of spatial raster data sets required like DEM, Soil, Landcover. Moreover, about 6 climatic variables data on daily basis is required. SWAT also generate the polygone/sub-basins and assigned the climatic station based on the thiessen polygon approach. The creation of HRU is also a very good feature in the SWAT and you can easily find the flows in/out in each sub-basin.
Hopefully, it will be enough for justification.
Thanks and Regards,
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