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[1]SHU Tianzhu,WANG Xiaohong.Research for the Correlation Between Relief Amplitude and Regional Soil Erosion Based on 3S Technology[J].Research of Soil and Water Conservation,2017,24(04):127-132.

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Research for the Correlation Between Relief Amplitude and Regional Soil Erosion Based on 3S Technology

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 04 Page number: 127-132 Column: Public date: 2017-08-28

Title:: Research for the Correlation Between Relief Amplitude and Regional Soil Erosion Based on 3S Technology

Author(s):: SHU Tianzhu, WANG Xiaohong; College of Forestry, Guizhou University, Guiyang 550025, China

Keywords:: relief amplitude; soil erosion; mean change-point analysis; 3S technology

CLC:: S157.1;P208

DOI:: -

Abstract:: Relief amplitude directly affects the runoff variation of the earth surface, thus, it is one of the main causes of soil erosion. The premise of analysis the relativity between relief amplitude and soil erosion is to determine the best analysis window under the scale data to extract the relief amplitude. In this paper, we analyzed the best analysis window which resulted from DEM(30×30 resolution)of Luodian County in Guizhou Province through a method of mean change-point under the support of 3S technology. And according to the modified classification criteria of soil erosion in 2007, we estimated the soil erosion amount of each sample unit in study area. Finally, we analyzed the relativity between relief amplitude and regional soil erosion. The results show that the best analysis window under the scale data in Luodian County is 32×32, and the best statistical area is 0.921 6 km², which effectively proves that using the mean change point analysis method for extracting the relief amplitude was feasible. Furthermore, the obtained correlation coefficient between relief amplitude and regional soil erosion modulus in Luodian County is 0.5 191, fully illustrating that relief amplitude as one of macroscopic topographic factors is one of the dominant factors in regional soil erosion.

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