Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Test on Rainfall-runoff with Different Land Use Patterns in Loess Hilly Region

ZHAO Peng-yu1,XU Xue-xuan1,2,LI Bo1,et al.(1.College of Earth and Environmental Science,Northwest A & F University,Yangling,Shaanxi 712100,China;2.Soil and Water Conservation Research Institute of CAS and MWR,Yangling,Shaanxi 712100,China;3.Gansu Provincial Institute of Soil and Water Conservation Research,Lanzhou,Gansu 730020,China)  
It establishes the runoff plots of grassland,cradled grassland,ploughed grassland,bush-land,cradled bush-land and ploughed bush-land in Yangou experimental area in Yan'an.The duration of runoff yield of grass-bush land is far greater than that of the cradled and ploughed lands based on the analysiss datas of duration of runoff yield,runoff intensity,runoff depth and infiltration rate which are obtained from 30 artificial rainfalls.The runoff intensity and fluctuation amplitude of ploughed bush-land is the maximum,1.5 times of ploughed grassland,3.4 times of grassland and 15.7 times of bush land.During each rainfall,the mean runoff depth and infiltration rate of grassland are 17.1 mm and 75%,cradled grassland 25.3 mm and 62%,ploughed grassland 38.4 mm and 35.6%,bush land 3.2 mm and 97%,cradled bush-land 5.6 mm and 92%,ploughed bush-land 46 mm and 35% respectively.The outcomes show that vegetation can impound runoff effectively and the damage to grass-bush land can cause serious soil and water loss in loess hilly region.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved