TITLE:
A Diffusion Wave Based Integrated FEM-GIS Model for Runoff Simulation of Small Watersheds
AUTHORS:
Reddy K. VENKATA, T. I. ELDHO, E. P. RAO
KEYWORDS:
Diffusion Wave Model, GIS, Interception, Interflow, Philip Infiltration Model, Runoff Simulation
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.1 No.6,
December
23,
2009
ABSTRACT: In this paper, an integrated model based on Finite Element Method (FEM) and Geographical Information Systems (GIS) has been presented for the runoff simulation of small watersheds. Interception is estimated by an exponential model based on Leaf Area Index (LAI). Philip two term model has been used for the estima-tion of infiltration in the watershed. For runoff estimation, diffusion wave equations solved by FEM are used. Interflow has been simulated using FEM based model. The developed integrated model has been applied to Peacheater Creek watershed in USA. Sensitivity analysis of the model has been carried out for various pa-rameters. From the results, it is seen that the model is able to simulate the hydrographs with reasonable ac-curacy. The presented model is useful for runoff estimation in small watersheds.