摘要
该文以小良水土保持试验站3号试验场(光板地)1983年至1989年7年间观测到的有关降雨侵蚀资料为研究内容,运用计算机技术,对小良水保站的降雨侵蚀动能作了比较深入的分析。对小良站的雨型、瞬时雨强所产生的侵蚀动能以及由此而产生的土壤侵蚀等方面,都作了有益的探讨;对引起土壤侵蚀的临界降雨强度即侵蚀性降雨的底值(X)作了定量描述,即X=9.4mm(一次降雨雨量)I_(30)=8.7mm/h或I_5=20.6mm/h。在应用通用土壤流失方程时,对小良水土保持试验站的降雨因子作了必要的修正,并给定了适合在各种情况下的综合雨型系数。同时,在回旧分析的基础上,建立了瞬时雨强和相应土壤侵蚀量之间的模拟方程,并具有较高的置信度。
With some rainfall erosion data measured in 7 years from 1983 to 1989 in No.3 Te-sting Field (by bare land) at xiaoliang water and soil conservation station as theresearch contents, computer techniques are used to make a rather detailed analysisof kinetic energy of rainfall erosion at xiaoliang water and soil conservationStation. Also, a benefit discussion was made on rainfall types, erosion kinetic energy produced by instant rainfall, intensity thereby to cause soil erosion in thispaper. At the same time, the critical rainfall intensity to cause soil erosion i.e. thebottom value (X) of erosive rainfall was described quantitatively, i. e. X = 9.4 mm(rainfall in one time), I_(30) = 8.7 mm/h or I_5 = 20.6 mm/h. When using universalsoil loss equation,the necessary modification was made to rainfall factorat XiaoliangWater and Soil Conservation Station, and also the coefficients of comprehensiverainfall typs in various cases were given. Meanwhile, based on the regressionanalysis, the simulation equation between instant rainfall intensity and the amountof corresponding soil erosion was established with a high reliability.
出处
《水土保持通报》
CSCD
北大核心
1992年第1期42-51,共10页
Bulletin of Soil and Water Conservation
关键词
雨型
雨强
侵蚀动能
rainfall patterns
rainfall intensity
erosion kinetic
