陕北河流月径流和月输沙集中特性初步研究  

Primary Study on the Characteristcs of Concentration of Monthly Runoff and Silt Load of Streams in North Shaaxi Province

作　　者：姜永清[1] 王万中[1] 胡光荣[1] 

机构地区：[1]中国科学院西北水土保持研究所,水利部西北水土保持研究所

出　　处：《水土保持通报》1994年第4期19-27,54,共10页Bulletin of Soil and Water Conservation

摘　　要：比较几种集中程度的表达公式。结果表明：陕北黄河流域河流月径流和月输沙量的集中指数（Ａｇ）、不均匀系数（Ｃｌ）、集中度（Ｃｎ）和吉布斯──马丁分散指数（Ｇ．Ｍ）之间的相关性极显著（α＝０．００１），其中以月分量向量合成的集中度（Ｃｎ）的变异系数和极差范围最大。年总径流量和年输沙侵蚀模数与月径流、输沙量的集中度及其相应的集中时相角度之间有显著的相关性。利用集中程度指标分析河流径流和输沙侵蚀模数并规划径流泥沙的调控和流域的水土流失治理途径。In the paper we compared several formulas on the magnitude of concentration of monthly strem runoff and siltload within a year in 33 hydrological stations of tributaries of Yellow River in North Shaanxi Province. The reultsshiow there is a retoarked significance ralationship(α=0. 00 1 ) between Aggregation Index(Ag ), Gibbs-Martinsegregation Index(G. M),Degree of concentrationCn) and Uneven Distribution Coefficient(Cl )which representthe characteristcs of concentration of monthly precipitation,strem runoff and load. Among the four formulas it is themaxmum that variation coefficient and the range of maxmum and minimum of theDegre of concentration(Cn).There is a remarkable significance relationship between yearlyload modulus or yearly runoff and monthly Degree ofconcentration and it's peried of which calculated from vector composition of monthly runoff or load as a vector.So,wecan use the indexes of monthly concentration characteristics to analvxis the stream runoff and sediment vield andto plan approaches of soil and water conservation in a watershed and realignmet of runoff and sediment

关 键 词：径流 泥沙 水土流失 陕北河流 

分 类 号：S157.1[农业科学—土壤学]