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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water resources and hydroinformatics : Investigations on land use/land cover change and climate variability on rgeneration Ęc a case study ...
Investigations on land use/land cover change and climate variability on rgeneration Ęc a case study of valapattnam river basin, indiaunoff
Author : Sinha R. K.(1), Eldho T. I.(1,2), Ghosh S.(1,3)
ABSTRACT
The Land use Land cover (LULC) change and climate variability are the important factors that affect the runoff
generation in watershed/river basin. In India, Western Ghats have the characteristics of rich biodiversity and high
biological productivity in India. Valapattanam river is one of the important west flowing river in Western Ghats originating
in Kerala and flow to the Arabian Sea. In this study, Enhanced Thematic Mapper Plus (ETM+) images of 2000 and
Operational Land Imager (OLI) images of 2014 are used to analyze the LULC for basin and classified as forest,
agriculture, wasteland, grassland, plantation and water bodies and urban area. Soil and Water Assessment Tool
(SWAT) was used to assess the impact of potential LULC and climate change over the last 14 years (2000-2014) on the
discharge with SWAT-CUP for calibration and validation analysis for the Valapattnam River basin. The results revealed
that forest area, agriculture land and builtup area were highly dynamic than other classes. During 2000-2014, the
catchment area was changed mainly from forest to grassland, grassland to agriculture and agriculture to builtup, and
climate change to warmer and drier. The land use change increased the surface runoff but climate change decreased
runoff strongly while combined effects of LULC and climate variability decreased runoff. In the catchment area,
increased urbanized area and deforestation were the strongest contributors to the increase of runoff at the sub-basinal
scale. The results indicated that the SWAT model appears to be useful as a tool to assess the impact of LULC changes
and climate variability for the surface hydrologic cycle and to better understand the connection among the surface runoff
in the Valapattnam River basin.
File Size : 463,975 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water resources and hydroinformatics
Date Published : 19/08/2015
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