不同雨强对裸露坡地水土流失的影响研究  

Effects of Rainfall Intensity on Soil and Water Losses in Bare Sloping Land

作　　者：江淼华[1,2] 黄荣珍[3] 谢锦升[2] 王维明 

机构地区：[1]闽江学院地理科学系,福州350108 [2]湿润亚热带山地生态国家重点实验室培育基地,福州350007 [3]南昌工程学院生态环境系,南昌330099 [4]福建省水土保持实验站,福州350003

出　　处：《亚热带资源与环境学报》2011年第4期24-28,共5页Journal of Subtropical Resources and Environment

基　　金：福建省科技厅重点项目"南方红壤区水土流失地生物固碳技术研究"(2009Y0014);福建省自然科学基金项目"中亚热带绿色‘土壤水库’的研究"(D0010014);福建省教育厅项目"杉阔混交林理水作用机制的研究"(K2001049)

摘　　要：运用坡面径流小区法,研究了闽北裸露坡地水土流失与不同雨强的关系,结果表明:1)裸露坡地径流量受雨强的影响较小,小雨和中雨时径流量与雨强呈线性相关,大雨时径流量与雨强不相关.2)雨强对土壤流失量的影响高于对径流量的影响.在降雨量相近的情况下土壤流失量与平均雨强呈线性关系.3)各时段雨强与裸露坡地的土壤流失量的相关性表现为I10>I30>I60,在不同雨型时均以I10的拟合效果最好.The relationship between rainfall intensity and soil and water losses of bare sloping land in Northern Fujian was investigated by the establishment of runoff equation. The results indicated that the runoff in bare sloping land was not closely related to the rainfall intensity, for example, under the condition of light or moderate rain, the runoff in bare sloping land and different rainfall intensity had a linear correlation, but for heavy rain, the relation could not be explained by functions. The effects of rainfall intensity on soil loss were more significant than on runoff. When the amount of different rainfall was close, the relationship between soil loss and average rainfall intensity was found to be consistent with the linear function. The relationship of different rainfall intensity and soil loss in bare sloping land was in the order of I10 〉 I30 〉I60.

关 键 词：降雨强度 水土流失 裸露坡地 

分 类 号：S157[农业科学—土壤学]