摘要
本项研究依据６年来在黄丘五副区定西试验区径流场所取得的观测资料，探讨了降雨物征值和地形中坡度、坡长、坡形三个因子对坡面水土流失的影响规律及其相互关系．提出了表征降雨侵蚀力、坡面产流的指标均为ＰＩ３０，依次建立了相应的数学模型群。此项研究不但从理论上揭示了坡面水土流失发生发展过程及机制，而且在实践上为有效地进行坡面水土流失的治理和水土保持措施的优化配置提供了科学依据。
According to experimental data ftom runoff observation plot of Dingxi experimental field in No.5 subregion of the rolling loess region in 6 years,the paper probes into the law of influence of precipitation features and landform fsctors(gradient,length and form) on soil loss from slopesurfsce and interrelation between them,puts forward that the indexes representing rainfall erosive force and runoff from slope surf see are all PI30,and sets up a group of mathmatic models correspondingly.The study not only expounds raising and developing process and machenism of soil loss from slope surfsce in terms of theory,but also provides scientific basis for effective control of soil loss from slope surface and optimized location of soil and water conservation measures in terms of practice.
出处
《中国水土保持》
北大核心
1996年第12期26-28,共3页
Soil and Water Conservation in China
关键词
定西
黄丘五副区
降雨
坡面
水土流失
Dingxi No.5 subregion of the rolling loess region rainfall landform factor soil loss from slope surface
