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Finite Element Method and GIS Based Distributed Model for Soil Erosion and Sediment Yield in a Watershed

DSpace at IIT Bombay

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Title Finite Element Method and GIS Based Distributed Model for Soil Erosion and Sediment Yield in a Watershed
 
Creator NAIK, MG
RAO, EP
ELDHO, TI
 
Subject catchment scale
transport
infiltration
equations
rainfall
flow
kinematic wave approximation
finite element method
erosion
sediment yield
geographical information system
remote sensing
 
Description The objective of this study is to develop a soil erosion and sediment yield model based on the kinematic wave approximation using the finite element method, remote sensing and geographical information system (GIS) for calculating the soil erosion and sediment yield in a watershed. Detachment of soil particles by overland flow occurs when the shear stress at the surface overcomes the gravitational forces and cohesive forces on the particles. Deposition occurs when the sediment load is greater than the transport capacity. Beasley et al.'s (Trans ASAE 23:938-944, 1980) transport equations for laminar and turbulent flow conditions are used to calculate the transport capacity. The model is capable of handling distributed information about land use, slope, soil and Manning's roughness. The model is applied to the Catsop watershed in the Netherlands and the Harsul watershed in India. Remotely sensed data has been used to extract land use/land cover map of the Harsul watershed, and other thematic maps are generated using the GIS. The simulated results for both calibration and validation events are compared with the observed data for the watersheds and found to be reasonable. Statistical evaluation of model performance has been carried out. Further, a sensitivity analysis has also been carried out to study the effect of variation in model parameter values on computed volume of sediment, peak sediment and the time to peak sediment. Sensitivity analysis has also been carried out for grid size variation and time step variation of the Catsop watershed. The proposed model is useful in predicting the hydrographs and sedigraphs in the agricultural watersheds.
 
Publisher SPRINGER
 
Date 2011-08-29T13:04:23Z
2011-12-26T12:58:36Z
2011-12-27T05:48:49Z
2011-08-29T13:04:23Z
2011-12-26T12:58:36Z
2011-12-27T05:48:49Z
2009
 
Type Article
 
Identifier WATER RESOURCES MANAGEMENT, 23(3), 553-579
0920-4741
http://dx.doi.org/10.1007/s11269-008-9288-y
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12092
http://hdl.handle.net/10054/12092
 
Language en