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Topographic Modelling of Soil Wetness in a River Basin using Digital Elevation Models

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Title Topographic Modelling of Soil Wetness in a River Basin using Digital Elevation Models
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Creator Tiwary, P., Patil, N.G., Aryal Jagannath, Karthikeyan, K., Vasu, D., Chandran, P., Ray, S.K., Singh, S.K. and Bhattacharyya, T.
 
Subject Topographic Modelling, Soil Wetness, River Basin, Digital Elevation Models
 
Description Not Available
Soil wetness or soil moisture, highly variable in both time and space, has a major influence on a range of hydrological processes including flooding, erosion, solute transport and land—atmosphere interactions, as well as a range of geographic and pedogenic processes. Topography greatly affects the spatial distribution of soil moisture, and groundwater flow often follows surface topography. The topographic wetness index (TWI) is now widely used for predicting the spatial distribution of wetness conditions (Le. the position of shallow groundwater tables and soil moisture) and is usually calculated from digital elevation model (DEM). The resolution and information content of a DEM has a great influence on the computed topographic indices. Hence, in the present study, the topographic wetness index was estimated for the Puma River Basin in Akola and Amravati districts of Maharashtra using ASTER (30 m resolution) and SRTM (90 m resolution) DEMs, as the topography of the basin is well suited for this type of study. The specific catchment area (SCA), A, has the highest variation in the maximum values of SCA, i.e., 15109.0 and 2044.8 m2 in for SRTM and ASTER DEMs, respectively. This variation in SCA is due to the cell size and flow accumulation values. Similarly, there was significant difference in slope derived ASTER DEM (slope:
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Date 2020-07-01T05:15:05Z
2020-07-01T05:15:05Z
2016-11-10
 
Type Presentation
 
Identifier Tiwary, P., Patil, N.G., Aryal Jagannath, Karthikeyan, K., Vasu, D., Chandran, P., Ray, S.K., Singh, S.K. and Bhattacharyya, T. (2016) Topographic Modelling of Soil Wetness in a River Basin using Digital ElevationModels. Paper presented at the International Conference on “Integraed Land Use Planning for Smart Agriculture – An Agenda for Sustainable Land Management” Indian Society of Soil Survey & Land Use Planning, Napur, 10-13 November, 2016, pp.147.
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http://krishi.icar.gov.in/jspui/handle/123456789/37853
 
Language English
 
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