ĐÁNH GIÁ MỨC ĐỘ ẢNH HƯỞNG CỦA THAY ĐỔI SỬ DỤNG ĐẤT ĐẾN XÓI MÒN ĐẤT BẰNG ỨNG DỤNG MÔ HÌNH SWAT Ở XÃ HƯƠNG BÌNH, HƯƠNG TRÀ, THỪA THIÊN HUẾ

Nguyễn Bích Ngọc¹, Phạm Hữu Tỵ¹, Trần Thanh Quang², Trần Thị Phượng¹

1 Trường Đại học Nông Lâm Huế.

² Chi cục Quản lý đất đai, Sở Tài nguyên và môi trường, Tỉnh TT Huế

Từ khóa: đánh giá, ảnh hưởng, thay đổi, sử dụng đất, xói mòn, mô hình SWAT, SWAT, Hương Bình, Thừa Thiên Huế

Application of SWAT to simulate effects of land use change in soil erosion in Huong Binh commune, Huong Tra district, Thua thien Hue provine

Nguyen Bich Ngoc¹, Pham Huu Ty¹, Tran Thanh Quang^2, Tran Thi Phuong¹

SUMMARY

The objectives of this study are to analyze land use change from 2000 to 2010 of Huong Binh commune and assess the effects of land use change on soil erosion in this area. This paper presents a comprehensive methodology that integrates Soil and Water Assessment Tools (SWAT) model with a Geographic Information System (GIS) and Remote Sensing (RS) for simulating effects of land use change on soil erosion. The basic data of precipitation, inflow, outflow, and the DEM, soil map and Landsat 7+ETM images of the study site were collected. The results show that water body and dry agricultural land area increased while mixed Forest and rice land declined continuously over the study period. The integrated approach in this study allows for relatively easy, fast, and cost-effective estimation of spatially distributed soil erosion and analyses of the land use change effects on soil erosion. It thus provides a useful and efficient tool for predicting soil erosion potential and assessing erosion impacts of conservation support practices.

Key words: Land use change, soil erosion, SWAT, GIS, remote sensing.