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[1]WU Yan,ZHANG Xiao-ping,CHEN Feng-juan,et al.Preliminary Investigation on Soil Erosion and Spatial Distribution after Returning Farmland in Typical Watershed of Northern Shaanxi Province[J].Research of Soil and Water Conservation,2010,17(04):29-33.

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Preliminary Investigation on Soil Erosion and Spatial Distribution after Returning Farmland in Typical Watershed of Northern Shaanxi Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 04 Page number: 29-33 Column: Public date: 2010-08-20

Title:: Preliminary Investigation on Soil Erosion and Spatial Distribution after Returning Farmland in Typical Watershed of Northern Shaanxi Province

Author(s):: WU Yan¹, ZHANG Xiao-ping^1,2, CHEN Feng-juan¹, WAN Long¹, FU Yan-ling¹, LIU Guo-bin²; 1. College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and WaterConservation, Yangling, Shaanxi 712100, China

Keywords:: soil erosion; spatial distribution; hily-gullt region

CLC:: S157.1

DOI:: -

Abstract:: Soil erosion in Loess Plateau is very serious.In recent years,implementation of the policy of returning farmland to forest has a fundamental impact on soil erosion.In order to learn the situation of soil erosion in this area,taking the Majiagou gully which lies in the north part of Shaanxi province,the typical hilly and gully loess region as the example,based on land use filed survey and data in 2008,using Standards for classification and gradtion of soil erosion (SL190-96) from Ministry of Water Resources,this paper calculated soil erosion modulus of watershed and analyzed their spatial distributions.It is shown that soil erosion modulus in Majiagou was 5 700t/(km²·a) under the conditions in the land use and land cover.The areas of classification erosion levels present normal distribution.The moderate erosion takes 53.65% area of watershed,the intense and slight levels take 17.23%,14.64%,respectively.Severe,weak and extreme severe level take less erosion area,for 4.16%,1.12% and 9.2%.The erosion distributions of upper,middle and downstream area are affected by terrain geomorphology.In upper and middle area,it matches the whole watershed erosion distribution.In downstream area,most area erosion level is weak or intense,gentler and severe levels concentrate less in proportion.

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