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[1]SU Yuan,WANG Zhijie,YAN G Rui,et al.SpatioTemporal Variation Characteristics of Soil Erosion in Southern Shaanxi Region Based on RUSLE[J].Research of Soil and Water Conservation,2018,25(05):1-11.

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SpatioTemporal Variation Characteristics of Soil Erosion in Southern Shaanxi Region Based on RUSLE

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 05 Page number: 1-11 Column: Public date: 2018-09-06

Title:: SpatioTemporal Variation Characteristics of Soil Erosion in Southern Shaanxi Region Based on RUSLE

Author(s):: SU Yuan¹, WANG Zhijie², YAN G Rui¹, YAO Jing³; 1. College of Forestry, Guizhou University, Guiyang 550025, China;
2. College of Life Sciences, Guizhou University, Guiyang 550025, China;
3. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China

Keywords:: southern Shaanxi Region; soil Erosion; spatiotemporal variation; RUSLE

CLC:: S157.1

DOI:: -

Abstract:: With the help of GIS and RS technology, based on remote sensing image data, DEM data, soil type data, rainfall data, vegetation coverage data and land use data, RUSLE as the evaluation model was used to calculate and analyze the spatial and temporal dynamic characteristics of soil erosion intensity in southern Shaanxi Region in recent 20 years from 1995 to 2014. The results showed that:(1) the soil erosion modulus in 5 periods were 787.86 t/(km²·a),1 362.97 t/(km²·a),1 627.75 t/(km²·a),1 684.41 t/(km²·a) and 1 571.79 t/(km²·a), respectively, the tendency was to increase rapidly at first and then decrease slowly, the soil erosion types were micro and slight erosion. The micro erosion decreased with time change, the other 5 grades increased volatility; (2) the soil erosion in the central region and the northern of Daba Mountain of study area was more severe, especially in Ziyang County and Zhenba County; the average soil erosion intensities were 2 935.47 t/(km²·a) and 3 327.45 t/(km²·a), respectively, which belonged to moderate erosion; (3) for different altitude, the soil erosion increased first and then decreased with elevation rise; the soil erosion distributed most widely in middle-mountain area (800~2 000 m), its erosion intensity was large, and low-mountain area (500~800 m) was in next; the soil erosion distributed less in hilly and high-mountain area, the erosion intensity was small; (4) for different slope gradients, the soil erosion was more serious with the greater slope gradients, and slopping area with greater than 25° was the main soil erosion area in the study area, also was the main area of soil erosion prevention in southern Shaanxi Region.

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