文献类型：期刊文献

中文题名：基于通径分析的陕北黄土坡面径流产沙影响因素

英文题名：Factors affecting slope runoff and sediment yield in northern Shaanxi Province based on path analysis

作者：艾宁[1] 魏天兴[1] 朱清科[1] 葛根巴图[2] 秦伟[3] 赵兴凯[1] 赵维军[4] 马欢[1] 杨苑君[1]

第一作者：艾宁

机构：[1]北京林业大学水土保持学院,水土保持与荒漠化防治教育部重点实验室;[2]中国林业科学研究院沙漠林业实验中心;[3]中国水利水电科学研究院泥沙研究所;[4]泰山学院山东省高校旅游与资源环境重点实验室

年份：2015

卷号：37

期号：6

起止页码：77-84

中文期刊名：北京林业大学学报

外文期刊名：Journal of Beijing Forestry University

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：林业公益性行业科研专项(201104002-2)

语种：中文

中文关键词：逐步回归分析;通径分析;径流量;产沙量

外文关键词：stepwise regression analysis; path analysis; runoff; sediment yield

分类号：S715.3

摘要：通过对陕北半干旱黄土区16场有径流产沙发生的次降雨数据进行收集,以径流量和产沙量为因变量,植被类型、植被盖度、坡度、坡向、降雨量、降雨历时、场均雨强、I5、I10、I15、I30、土壤密度、土壤稳渗率作为自变量,在进行逐步回归分析的基础上,对影响径流量及产沙量的主要因素进行通径分析,结果表明:1)植被盖度、降雨量、降雨历时、I30、稳渗率是影响径流量的主要因素,径流量、植被盖度、坡度、降雨量、场均雨强、I15、土壤密度为影响坡面降雨产沙量的主要因素;2)降雨历时、降雨量、I30对径流量起到决定性作用,且对径流量产生影响的直接影响因素排序为降雨历时>I30>降雨量>植被盖度>稳渗率,而间接影响排序为降雨量>降雨历时>稳渗率>I30>植被盖度,决定系数排序为d降雨量·降雨历时>d降雨历时·降雨历时>dI30·I30>d降雨量·降雨量>d植被盖度·植被盖度;3)径流量、降雨量、I15对产沙量起到决定性作用。对产沙量影响因素排序:从直接通径系数来看,径流量>I15>土壤密度>降雨量>场均雨强>植被盖度>坡度;从间接通径系数来看,降雨量>场均雨强>植被盖度>I15>土壤密度>径流量>坡度;从决定系数来看,d径流量·径流量>d径流量·降雨量>d径流量·I15>dI15·I15>d土壤密度·土壤密度>d降雨量·降雨量。
Based on data collected in 16 rainfall events with runoff and sediment yield on semiarid loess area in northern Shaanxi Province of northwestern China, we determined the main factors affecting runoff and sediment yield using path analysis. The runoff and sediment yield were set as dependent variables, while vegetation type, vegetation coverage, gradient, slope aspect, rainfall, rainfall duration, average rainfall intensity, I5, I10, I15, I30, soil bulk density and steady soil infiltration rate as independent variables. All the factors were processed by stepwise regression analysis. The following conclusions were reached： 1）Runoff was mainly affected by vegetation coverage, rainfall, rainfall duration, I30 and steady soil infiltration rate, while sediment yield was mainly influenced by runoff, vegetation coverage, gradient,rainfall, average rainfall intensity, I15 and soil bulk density. 2） Rainfall duration, rainfall and I30 were crucial factors affecting runoff; the factors affecting runoff based on the direct path coefficient were ranked in a descending order as rainfall duration 〉 I30 〉 rainfall 〉 vegetation coverage 〉 steady soil infiltration rate; based on the indirect path coefficient, the order was rainfall 〉 rainfall duration 〉 steady soil infiltration rate 〉 I30 〉 vegetation coverage; based on the coefficient of determination, the order was drainfall·rainfall duration 〉 drainfall duration·rainfall duration 〉 dI30·I30 〉 drainfall·rainfall duration 〉 dvegetation coverage·vegetation coverage. 3） Runoff, rainfall and I15 were critical factors for sediment yield; The descend order of factors affecting runoff based on the direct path coefficient were ranked in a descending order as I15 〉 soil bulk density 〉rainfall 〉 average rainfall intensity 〉 vegetation coverage 〉 gradient; based on the indirect path coefficient, the order was rainfall 〉 average rainfall intensity 〉 vegetation coverage 〉 I15 〉 soil bulk density 〉 rainfall 〉 gradient; based on the coefficient of determination, the order was drunoff·runoff 〉 drunoff·rainfall 〉 drainfall·I15 〉 dI15·I15 〉 dsoil bulk density·soil bulk density 〉 drainfall·rainfall.