Abstract
The ecological environment of Northeastern Ordos Basin which located in the Northwestern China belongs to arid and semi-arid area. The hazards of water and soil loss here are serious caused by gully river erosion. Since Soil erosion is an important factor leading to the destruction of regional ecology and has a profound impact on the long-term and healthy development of the economy and society, it is necessary to do research on the sensitivity analysis about soil erosion. In this study, the AHP (Analytic Hierarchy Process) method was used to determine the index weight of the factors for soil erosion, and made it more consistent with the whole regional condition. The results demonstrated that the soil medium, slope and vegetation coverage had the highest influence on soil erosion under the same climatic and meteorological conditions in the study area. This research evaluated the sensitivity factors and provided a significant guidance for soil erosion control.
Highlights
The Ordos region is an important energy and chemical industry base for the coexistence of multiple energy sources such as oil, gas, coal, and uranium in China[1,2].The region belongs to arid and semi-arid areas, the ecological environment is fragile, and the intensity of soil and water loss range is large, its form is mainly erosion of gully river
The related research work on water loss in Ordos area mainly focused on the prevention and control of soil erosion, such as the use of vegetation[3,4,5,6,7], construction of water conservancy facilities, and soil modification[8],and put forward some countermeasures[9,10].In the past, most of the work was carried out on regional or specific land types[4,6], which lacked systematicity and integrity,and it is difficult to provide a systematic basis and reference for regional water, land resources protection and urban planning .So in this research, the northeastern area of Ordos was taken as a typical research area .According to the data obtained from the field survey in 2015-2017, the regional evaluation research work was carried out
The mild risk zone is mainly distributed in the southwestern corner, northwestern corner and middle part of the research area, and a few area are distributed along rivers, the area ratio is 19% of the whole area
Summary
The Ordos region is an important energy and chemical industry base for the coexistence of multiple energy sources such as oil, gas, coal, and uranium in China[1,2]. The related research work on water loss in Ordos area mainly focused on the prevention and control of soil erosion, such as the use of vegetation[3,4,5,6,7], construction of water conservancy facilities, and soil modification[8],and put forward some countermeasures[9,10].In the past, most of the work was carried out on regional or specific land types[4,6], which lacked systematicity and integrity ,and it is difficult to provide a systematic basis and reference for regional water, land resources protection and urban planning .So in this research, the northeastern area of Ordos was taken as a typical research area .According to the data obtained from the field survey in 2015-2017, the regional evaluation research work was carried out. Carrying out the regional soil erosion sensitivity assessment is of great significance to regional social and economic development and ecological environmental protection
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