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Effect of Changes in Land Use/Land Cover on Runoff from Watershed Using CN Approach
Due to population explosion and economic development, the changes in land use/land cover (LULC) have an impact on storm water runoff characteristics naturally in the watershed hydrologic responses. The curve number (CN), which expresses the potential for runoff, is a function of LULC, soil type, and moisture content. Therefore, to investigate the effect of LULC changes in the rainfall-runoff simulation process, some models need CN as data input. The present study describes how to estimate the CN due to LULC changes during 1995–2019 and the runoff volume using NRCS-CN model and GIS tool in a part of the Manimuktha watershed of Tamil Nadu, India. IRS IC LISS III imagery data have been utilized for measuring the qualitative and quantitative spatial information on LULC changes and arrayed under the categories of agriculture, forests, settlements, wasteland, and water bodies. The result showed that from 1995 to 2019, the values of CN increased from 79.60 to 81.61, which indicates that the LULC changed significantly and the runoff was more. This study also recommends suitable strategies to control the negative effects like the increase of soil erosion and flood risks in the study area.
Effect of Changes in Land Use/Land Cover on Runoff from Watershed Using CN Approach
Due to population explosion and economic development, the changes in land use/land cover (LULC) have an impact on storm water runoff characteristics naturally in the watershed hydrologic responses. The curve number (CN), which expresses the potential for runoff, is a function of LULC, soil type, and moisture content. Therefore, to investigate the effect of LULC changes in the rainfall-runoff simulation process, some models need CN as data input. The present study describes how to estimate the CN due to LULC changes during 1995–2019 and the runoff volume using NRCS-CN model and GIS tool in a part of the Manimuktha watershed of Tamil Nadu, India. IRS IC LISS III imagery data have been utilized for measuring the qualitative and quantitative spatial information on LULC changes and arrayed under the categories of agriculture, forests, settlements, wasteland, and water bodies. The result showed that from 1995 to 2019, the values of CN increased from 79.60 to 81.61, which indicates that the LULC changed significantly and the runoff was more. This study also recommends suitable strategies to control the negative effects like the increase of soil erosion and flood risks in the study area.
Effect of Changes in Land Use/Land Cover on Runoff from Watershed Using CN Approach
Lecture Notes in Civil Engineering
Timbadiya, P. V. (editor) / Patel, P. L. (editor) / Singh, Vijay P. (editor) / Sharma, Priyank J. (editor) / Velayudha Das, M. (author) / Poongothai, S. (author)
International Conference on Hydraulics, Water Resources and Coastal Engineering ; 2021
2023-05-01
11 pages
Article/Chapter (Book)
Electronic Resource
English
Spatiotemporal Land Use and Land Cover Changes and Associated Runoff Impact in Itaperuna, Brazil
| DOAJ | 2023