Rainfall-Runoff Modeling of Upper Mountainous Riverine Watershed Area in Uttarakhand

Manish Kushwaha, Praveen Thakur, P.L.N. Raju

Abstract


Floods are one of the most prevalent natural catastrophes that occur every year all around the planet. Due to severe precipitation, cloud bursts landside, or glacial lake outbursts, flash floods are a typical occurrence in alpine rivers and places. Hydrological modeling is the outcome of a precise calculation for various mountainous aggregations. Flash flood prediction owing to heavy perception is being replicated in this research study utilizing rainfall data from a different occurrence for hydrological modeling. The parametric hydrologic modeling for the Mandakini River system upstream to Rudraprayag is covered in this research. Hydrographs are generated using the HEC-HMS semi-distributed hydrological model. In HEC-HMS, both stations, Agastmuni and Thaytur, are employed as point locations for precipitation time - series. Precipitation parameterized numerous climatic factors such as land use/land cover, topography information, rains, and soil texture, and ASTER DEM data were utilized as input to the model. The data was processed and analyzed using ArcGIS and the HEC-HMS model. These settings were used to simulate three historical flash floods: July 31, 2010, September 13, 2012, and June 13, 2013. Utilizing IMD rainfall distribution and TRMM 3B42 v7 3-hourly products, these parameters are confirmed for accuracy and likelihood of detecting flash flood ratio. For the study, the obtained results might be valuable to the hydrology and water reserves departments and research institutes.


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