Hydrological Modelling of Errakalava West Godavari District, Andhra Pradesh, India

摘要

Hydrological modelling of a drainage basin is a function of rainfall kinetics, land characteristics and the vegetation cover thereon. Apart from rainfall, soil and vegetation, surface topography, the morphological characteristics viz. basin shape and stream network also decides the flow direction and its accumulation, runoff volume, intensity and peak flow. So, a precise DEM is required, which defines the flow direction and stream network at micro level. In this context, the HEC-HMS modeling is adopted in which the hydrological response behaviour provides the runoff and soil erosion assessment of watersheds under a given flood period where remote sensing data is the major input to analysis.