Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Ecology and Environmental Sciences》 2009-04
Add to Favorite Get Latest Update

Contributing ratio of impact factor on gully erosion in Loess hilly and gully area of Qinghai province

SUN Genxing1, WANG Shi1, ZHAO Chuanchuan1, YANG Qiaomei1, YANG Ninggui1, DONG Xu2 1. College of Resource & Environment, Shaanxi University of Science and Technology, Shaanxi, Xi’an 710021, China; 2. Qinghai Provincial Forest Inventory and Planning Institute, Xi’ning 810008, China  
Taking six gullies in Fengdui township, Ledu county, Qinghai province as research object, this paper focused on the effect of three indicators on erosion gully, of which annual erosion modulus is measured by the method of steel rod, the erodibility factor K was calculated by soil contents of sand, silt, clay and organic matter and the relative contribution rate was determined by the standardization of process and the multiple-regression analysis among annual erosion modulus, vegetation coverage, slop and factor K. The results showed that the annual erosion modulus would decrease significantly with the increase of vegetation cover and there would be some trends that the sensitivity of erosion amount to vegetation cover would decrease with the increase of the vegetation cover and the erosion amount would become larger with the increase of slope and factor K. The contributing ratio of vegetation cover, slope and factor K changes were 66.97%, 7.12% and 25.91%. It was obvious that the influences of vegetation cover were larger than those of slope and factor K for the soil erosion in the study area.
【Fund】: 青海省林业局资助(横向合作项目)
【CateGory Index】: S157
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved