豫西山区淤地坝泥沙淤积过程及流域产沙模型  

Depositing process of silt dam and model of sediment yield in west mountainous area of Henan Province

作　　者：王国重[1] 梅亚东[1] 双瑞 屈建钢 贾爱卿[3] 荣耀[4] 王代长[5] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]河南省水土保持监督检测总站,河南郑州450008 [3]河南省水利厅水土保持处,河南郑州450003 [4]河南省核工业放射性核素检测中心,河南郑州450002 [5]河南农业大学资源与环境学院,河南郑州450002

出　　处：《武汉大学学报（工学版）》2010年第5期558-561,共4页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:50779049).

摘　　要：对所选淤地坝剖面分层采集土样,测定其中的137Cs含量并计算各层泥沙淤积量,根据当地降雨资料,按照大雨对大沙的原则,将各淤积层与次侵蚀性降雨相对应.而后运用数理统计理论将各层的泥沙淤积量与次降雨特性中的4个指标(次降雨侵蚀力R、最大30min雨强I30、降雨量P、平均雨强I)进行回归分析,得出结论:次降雨侵蚀力R、最大30min雨强I30、次降雨量P是流域产沙的主要因素,其中次降雨侵蚀力R是关键因素.最后根据建立的多元回归模型进行模拟,预测值与计算值拟合较好,说明所建的模型符合当地实际情况.Layered soil samples were collected in the chosen profile of silt dam to determine the content of 137Cs; and layered sedimentation levels were surveyed. Single erosive rainfall was ascertained according to local rainfall data and the principle of heavy rain on the large sand. Regression analysis of deposited volume with the four indicators of single rainfall characteristics （rainfall erosivity（R） , maximum rainfall intensity in thirty minutes （130）, rain capacity（P） and average rainfall intensity（I）） were made, using mathematical statistics theory; the results of which indicate that the relationships between deposited volume and the first three indices were closer; rainfall erosivity was the closest among them. The predicted and calculated val- ues are in order by the multiple regression model established to simulate, which shows the model is adap- tive to local realities.

关 键 词：淤地坝 137Cs 旋回层 侵蚀性降雨 回归分析 模型 

分 类 号：TV14[水利工程—水力学及河流动力学]