Soil Erosion in Important Agricultural Areas of Haidong City, Qinghai Province, China

Qi Jigui; Jia Wei; Xie Huichun; Ma Yujun

doi:10.30560/ls.v6n1p11

Qi Jigui Qinghai Provincial Key Laboratory of Physical Geography and Environmental Process, College of Geographical Science, Qinghai Normal University, Qinghai, China; QumaLai County Meteorological Bureau, Yushu, Qinghai, Qinghai, China
Jia Wei Qinghai Provincial Key Laboratory of Physical Geography and Environmental Process, College of Geographical Science, Qinghai Normal University, Qinghai, China; Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation (Ministry of Education), Qinghai Normal University, Qinghai, China
Xie Huichun College of Life Science, Qinghai Normal University, Qinghai, China
Ma Yujun Qinghai Provincial Key Laboratory of Physical Geography and Environmental Process, College of Geographical Science, Qinghai Normal University, Qinghai, China; Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation (Ministry of Education), Qinghai Normal University, Qinghai, China

DOI: https://doi.org/10.30560/ls.v6n1p11

Keywords: multispectral remote sensing, land use types, soil erosion, RUSLE, Haidong City

Abstract

Haidong City is located in the eastern region of the Tibetan Plateau and the upper reaches of the Yellow River, which is an important agricultural area in Qinghai Province. Surface soil erosion in this area not only reduces soil quality, but also leads to the pollution of the Yellow River water and the increase of sand transport.The soil erosion status of Haidong City in 2022 was assessed using the modified soil loss equation (RUSLE model), combined with landsat8 OLI imagery, DEM, rainfall and land use data, and RS and GIS techniques. The results show that soil erosion in Haidong City is dominated by slight and mild erosion, with an area of 7,835 km² and 2,735 km² respectively.Among the districts (counties), Ledu District and Mutual aid County have the largest area of strong erosion, with an area of 633 km² and 144 km² respectively; Ping'an District and Minhe County have a smaller area of strong erosion, with an area of 11 km² and 30 km² respectively.Between the different land-use types. grassland erosion area was the largest, with an area of 7449km², accounting for 59.83%. The results of the above study can provide a scientific basis for soil degradation management in the region to meet the challenges of fragile ecological environment and increasing land use.

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