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 An open source gis approach for soil erosion modeling in Danang City, Vietnam
Tác giả hoặc Nhóm tác giả: Bien Le Van, Minh Truong Phuoc, An Tran Thi, Venkatesh Raghavan
Nơi đăng: Proceedings International Symposium on Geo Informatics for Spatial – Infrastructure Development In Earth and Allied Sciences GIS – IDEAS 2014; Số: 307;Từ->đến trang: Pages: 307-315;Năm: 2014
Lĩnh vực: Tự nhiên; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
This study is objective to establish the model of soil erosion hazard in Danang city, Vietnam using Revised Universal Soil Loss Equation (RULSE) and Geographical Information System (GIS) tool. Rainfall erosivity (R), slope length-steepness (LS), soil erodibility (K), cover management (C), and conversation practice (P) were used to generate soil erosion map. Rainfall map was interpolated from rainfall points data that were collected in some weather stations in Danang city. A 30m digital elevation model (DEM) was generated from1:25,000 scale topographic map, and used to extract slope length-steepness (LS) parameter. Soil erodibility (K)was calculated from soil map of study area using Wischmeier equation (1978). Cover parameter was calculate using Normalized Different Vegetation Index (NDVI) extracting from Landsat satellite data. In this research, an Open Source Geographical Resources Analysis Support System (GRASS) tool was used for developing potential soil erosion map for Danang city.
ABSTRACT
This study is objective to establish the model of soil erosion hazard in Danang city, Vietnam using Revised Universal Soil Loss Equation (RULSE) and Geographical Information System (GIS) tool. Rainfall erosivity (R), slope length-steepness (LS), soil erodibility (K), cover management (C), and conversation practice (P) were used to generate soil erosion map. Rainfall map was interpolated from rainfall points data that were collected in some weather stations in Danang city. A 30m digital elevation model (DEM) was generated from1:25,000 scale topographic map, and used to extract slope length-steepness (LS) parameter. Soil erodibility (K)was calculated from soil map of study area using Wischmeier equation (1978). Cover parameter was calculate using Normalized Different Vegetation Index (NDVI) extracting from Landsat satellite data. In this research, an Open Source Geographical Resources Analysis Support System (GRASS) tool was used for developing potential soil erosion map for Danang city.
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