Work

Assessment of Sub-watershed for Soil Erosion Threat in a Semi-arid Region Watershed (bennihalla) of North Karnataka Using Morphometric Analysis and Geo-computational Approach

Year: 2024

Type: article

Abstract: Understanding the risks associated with soil erosion and drainage patterns is essential for agricultural output. In the research 9 sub-watersheds of the Bennihalla catchment located in semi-arid regions is studied to priorities for soil erosion-threat through morphometric investigation with the help of Geospatial methods and weighted sum approaches (WSA). ArcGIS was used to build drainage networks; SRTM DEM to delineate sub-watersheds and morphometric parameters (linear, relief and area) following standard formulas. The said parameters used to rank and prioritize sub-watersheds. A weighted sum approach (WSA) and cross-correlation of 18 morphometric parameters were used to approximate the compound factor. The compound factors for various sub-watersheds ranged from 0.0052 to 4.412. Lowest compound factor was given the highest priority. Sub-watersheds were classified as very good, good, moderate, low, and very low according to their compound factor value. The results indicated that, SW1 and SW 9 are influenced by respectively lowest and highest soil erosion threats, the other sub watershed that also need. Soil conservation measures include. SW7, and SW5 (1980.67 km2 area).

Source: Journal of Tianjin University Science and Technology

DOI: 10.5281/zenodo.15016600

Authors: SUJAY K, V. S. HEGDE

Institutions: KLE Technological University, Visvesvaraya Technological University, National Institute of Advanced Studies

Language: English

Topic: Groundwater and Watershed Analysis

Subfield: Environmental Engineering

Field: Environmental Science

Domain: Physical Sciences

SDGs: Life on land, Clean water and sanitation

Open Access status: hybrid

OpenAlex ID: W6893178580

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