|
|
|
| Quantitative analysis of influencing factors on soil erosion and water loss for sloping cropland of earth rocky mountain areas in Shandong Province |
| Zhang Zixue1,Yang Jihua1,Lü Lanzhou2,Chen Anqiang1,Luo Mingda1 |
| 1.Soil and Water Conservation Department of Forest College,Shandong Agricultural University,271018,Tai'an,Shandong;2.Shandong Province Water Conservancy Government Office Water and Soil Conservation Department,250013,Jinan: China |
|
|
|
|
Abstract The runoff and soil erosion data were observed in four sloping cropland plots in Linqu,Mengyin,Tai'an,Wendeng soil and water onservation experimental station of Shandong Province.The runoff and soil erosion under different cropland,slope gradient,slope length and different rainfall were analyzed in order to know the rule of soil erosion and water loss of earth rocky mountain areas in Shandong Province.The results show that there are good linear relation between rainfall amount,rainfall intensity and runoff,soil erosion under same landform.The descending order of change extent of runoff and soil erosion amount is corn,peanut,wheat+peanut,wheat+soybean.There are good linear relation between rainfall amount,rainfall intensity and runoff,soil erosion amount under different slope length and gradient.With the increasing of slope length and gradient,runoff and soil erosion amount are increasing.With the increasing of rainfall and rainfall intensity,runoff and soil erosion is increasing and the increasing extent reach maximum when rainfall amount is from 50.0 to 79.9 mm and rainfall intensity is larger than 50 mm/h.
|
|
Received: 26 August 2008
|
|
|
|
|
|
|
