MA Yaya, WANG Jie, ZHANG Chao, et al. Evaluation of Soil Erosion Based on CSLE Model in Zhifanggou Watershed of Northern Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 2018, 38(6): 95-102.
DOI:
MA Yaya, WANG Jie, ZHANG Chao, et al. Evaluation of Soil Erosion Based on CSLE Model in Zhifanggou Watershed of Northern Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 2018, 38(6): 95-102. DOI: 10.13961/j.cnki.stbctb.2018.06.015.
Evaluation of Soil Erosion Based on CSLE Model in Zhifanggou Watershed of Northern Shaanxi Province
[Objective] The soil erosion situation was evaluated in the Zhifanggou watershed of Northern Shaanxi Province in order to provides scientific basis and theoretical support for the adjustment and optimization of unreasonable land use patterns and the rational arrangement of soil and water conservation control measures in the watershed.[Methods] The present study amended the parameters of Chinese soil loss equation(CSLE) and calculated soil erosion intensity based on the data of monthly rainfall
DEM
soil type
and land use from 2005 to 2016 in the Zhifanggou watershed at Ansai County of Northern Shaanxi Province using ArcGIS. The linkages between land use change
slope degree and soil erosion intensity were also analyzed. Based on the aforementioned results
we put forward suggestions for the management of soil and water loss in this area.[Results] Soil erosion intensity differed greatly among different slope zones in the investigated area. Farmlands with 15°~25° slope in the watershed were sensitive to soil erosion. Forestland
farmland and grassland dominated the Zhifanggou watershed. The area of farmland decreased continuously and that of forestland and grassland increased gradually. Since the project of Grain for Green initiated
the area that subjected to soil erosion
and the erosion intensity were both decreased. There was a close association between land use change and soil erosion intensity
characterized by higher erosion intensity in farmland and lower density in forestland and grassland. These results indicated that increasing the forestland and grassland and decreasing the farmland could be favorable for the reduction of soil erosion.[Conclusion] Spatial distribution of soil erosion in the study area was dominantly determined by the land use types and slope degree. Soil and water loss management should focus on the slope land with degree of 15°~25°.
Knisel W G. CREAMS:A Field Scale Model for Chemicals, Runoff, and Erosions from Agricultural Management Systems[R]. USDA Conservation Research Report No.26, US:US Department of Agriculture, 1980.
Flangan D C, Nearing M A. USDA Water Erosion Prediction Project:Hill Slope Profile and Watershed Model Documentation[R]. USA:USDA-ARS, NSERL, Report No10 USDA-ARS, West Lafayette, Indiana. 1995.
Misra R K, Rose C W. Application and sensitivity analysis of process-based erosion model-GUEST[J]. European Journal Soil Science, 2010, 47(4):593-604.
Mccool D K, Brown L C, Foster G R, et al. Revised slope steepness factor for the universal soil loss equation[J]. Transactions of the ASAE-American Society of Agricultural Engineers(USA), 1987,30(5):1387-1396.
Zhang, Hongming, Yao Zhihong, Yang Qinke, et al. An integrated algorithm to evaluate flow direction and flow accumulation in flat regions of hydrologically corrected DEMs[J]. Catena, 2017(151):174-181.
Zhu Hanhua, Wu Jinshui, Guo Shengli, et al. Land use and topographic position control soil organic C and N accumulation in eroded hilly watershed of the Loess Plateau[J]. Catena, 2014, 120(1):64-72.
Liu Baoyuan, Nearing M A, Shi P J, et al. Slope length effects on soil loss for steep slopes[J]. Soil Science Society of America Journal, 1994,64(5):1759-1763.