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[1]DU Chaozheng,YANG Qinke,ZHANG Jiaqiong,et al.Assessment of Soil Water Erosion in Thailand Based on the CSLE Model and Sampling Survey[J].Research of Soil and Water Conservation,2022,29(04):1-9.

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Assessment of Soil Water Erosion in Thailand Based on the CSLE Model and Sampling Survey

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 04 Page number: 1-9 Column: Public date: 2022-06-20

Title:: Assessment of Soil Water Erosion in Thailand Based on the CSLE Model and Sampling Survey

Author(s):: DU Chaozheng^1,2, YANG Qinke¹, ZHANG Jiaqiong³, MA Bo³, WANG Chunmei^1,4, PANG Guowei^1,4; (1.College of Urban and Environmental Science, Northwest University, Xi'an 710127, China; 2.College of Urban Construction, Heze University, Heze, Shandong 274015, China; 3.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China; 4.Key Laboratory of Eco-hydrology and Disaster Prevention in Arid Areas, State Forestry and Grassland Administration, Xi'an 710127, China)

Keywords:: soil erosion; Chinese Soil Loss Equation; histogram matching; Thailand

CLC:: S157

DOI:: -

Abstract:: Through the quantitative evaluation of soil erosion in Thailand, the characteristics of soil water erosion were mastered in order to provide technical and data support for soil erosion prevention and control and related research in Thailand. The water erosion rate in Thailand was calculated by using the CLSE(Chinese Soil Loss Equation)model. The water erosion rate in Thailand was estimated based on the comprehensive calculation(map algebraic mapping)of the erosion factor from 30 m resolution maps, the water erosion rate for the sampling units was calculated based on the sub-meter resolution sampling survey. The map algebra mapping results were calculated for the sampling units from the reference map using histogram matching. Finally, the thematic map of soil water erosion rate was obtained. The results showed that:(1)the histogram matching results not only retained the original spatial distribution characteristics, but also had accurate statistical characteristics;(2)the average soil water erosion rate in Thailand was 687.9 t/(km²·a), which was 2.4 times of the global average soil water erosion rate; in some areas, it reached to more than 1 000 t/(km²·a)(accounting for 13.2% of the total area, and 72.0% of the total erosion); compared with the global average soil water erosion rate, soil water erosion in Thailand was more serious; the annual erosion in 0.6% of the area accounted for about 21.5% of the total erosion in the study area, and local erosion was severe;(3)among the land use types, the water erosion of cultivated land was the most serious, and the average water erosion rate was 1 020.2 t/(km²·a). 84.1% of hot spots, soil loss >2 500 t/(km²·a), were cultivated lands. It can be seen that soil water erosion is severe in some parts of Thailand, and cultivated lands contribute greatly to regional soil erosion.

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Last Update: 2022-06-20