摘要
透水坝是针对平原河网地区的地形特点以及农业非点源污染的时空不均匀性而开发的面源污染控制新技术,它既可以拦蓄径流,也具有一定的净化效果。透水坝的过水能力与其几何参数及渗透系数密切相关,可以通过联立渗流方程和达西定律进行计算。一般来说,在渗流量不是很大的情况下,可用矩形模型进行计算,而在贴坡流不可忽略的情况下则应采用梯形模型精确计算渗流量。通过现场试验,实测渗流量与理论值符合较好。
Permeable dam is a new technology for the agricultural non-point pollution treatment, which is designed on the basis of topographic characteristics of plain river network areas and the spacetime inhomogeneity of agricultural non-point pollution, permeable dam can hold up runoff and also have purification effect. The seepage of the permeable dam is concerned with the geometrical parameters and permeability coefficient, and it can be calculated by seepage equation and Darcy＇ s law. The condition of little seepage will be applied using a reetangle model, while the exact seepage trapezoid model will be applied when slope faced seepage can not be ignored. Measured seepage accords with theoretical values through a field seepage test.
出处
《中国给水排水》
CAS
CSCD
北大核心
2006年第13期22-25,共4页
China Water & Wastewater
基金
国家高技术研究发展计划(863)项目(2002AA601012-4)
关键词
透水坝
渗流
矩形模型
梯形模型
permeable dam
seepage
rectangle model
trapezoid model
