Runoff estimation methods

In this study, we applied four stepwise methods to estimate DCIA for a test urban catchment where the methods starts from identifying isolated impervious areas surrounded by pervious areas using GIS.

3p vicaptainmarvel 21-04-2023 13 3   Download

A rainfall – runoff model describes the relation between the rainfall and runoff for a particular catchment area. The relationship between rainfall in a period and the corresponding runoff is quite complex. SCS-CN method is used to estimate the runoff, but, SCS-CN method does not consider the impact of rainfall intensity and did not account for the influence of forest management practices. The aim of this study is to develop Fuzzy Logic Model to estimate runoff using rainfall given for the area under consideration.

13p gaocaolon9 22-12-2020 18 1   Download

The SCS-CN method has been widely used to estimate the surface runoff from rainfall-runoff events. However in North Western tract of India this is very poorly documented. So, the main objective of the study was to propose and select the best method for the computation of surface runoff including, new empirical method and to compare this by other approaches on the bases of Root mean square error (RMSE), Nash Sutcliffe efficiency (NSE), Coefficient of determination (R2), PB (Per cent biasness) and residual error.

14p trinhthamhodang1215 23-09-2020 11 2   Download

In water resource management the main basic requirement is the estimation of runoff resulted from precipitation. In present study, runoff from Chaskaman catchment estimated using different empirical methods such as Inglis and DeSouza formula, Khosla’s formula, Coutagine relationship, Department of irrigation India, and Strange’s table method. Hydrological data such as observed daily runoff of 15 years (2000-2014) was collected from Superintending Engineer, Department of Irrigation, Government of Maharashtra, Pune.

5p angicungduoc4 26-04-2020 15 1   Download

The study is carried out with a purpose to apply various techniques and models for the delineation of catchment and developing methods in order to calculate the Curve Numbers for the Manendragarh watershed (1023.96 Km2 ) of upper Hasdeosubbasin, by implementing three software’s i.e. Arc View GIS 10.4 with Arc Info, Arc Hydro Tool and Geospatial Hydrologic Modeling Extension (HEC-Geo HMS version 10.3) model for Arc View GIS 10.3. Multi layers like soil layer, DEM and Land Use Land Cover layer was combined and CN grid map was prepared.

7p trinhthamhodang1212 06-04-2020 31 3   Download

Satellite based precipitation product (GSMaP-MVK) can be reliably used to estimate the Areal Mean Precipitation error based on “Sample Design method” (Esdd) with the effort to mitigate the problem of sparse data, especially severe in poorly gauged river basins. In addition, the satellite-gauge merging precipitation would reduce significantly the magnitude gaps between the satellite rainfall estimations and the rain gauge data.

10p vinobita2711 31-05-2019 8 0   Download