摘要
通过在测坑中开展灌溉条件下2种含沙量4种泥沙级配组合下的浑水入渗试验,发现泥沙粒径对浑水入渗过程的影响显著:灌溉浑水的泥沙越细,其累积入渗量和入渗率越小,相同累积入渗量的入渗历时更长。利用Kostiakov原理和通用公式拟合不同泥沙级配浑水灌溉下的累积入渗量、入渗率与入渗历时的关系,决定系数均在0.90以上。发现浑水入渗特性的主要成因并提出关键影响因子粒径小于0.01 mm的泥沙影响值,分析结果表明不同泥沙级配浑水在同一入渗历时的累积入渗量和泥沙影响值成指数函数关系,不同泥沙级配浑水在同一入渗历时下的入渗率和泥沙影响值呈线性关系;通过建立泥沙影响值与入渗公式中各个参数的相关关系,用粒径小于0.01 mm泥沙影响值表征了相关性较好的参数。
Through the experiment on muddy water infiltration under combinations of two sediment concentrations and four different sediment gradations under irrigation condition,it was found that sediment particle sizes significantly affect the muddy water infiltration law. The smaller the sizes of sediment particles in muddy water,the smaller their accumulative infiltration capacity and infiltration rates and the longer their infiltration durations for the same accumulative infiltration capacity. The Kostiakov equation and the universal equation are used to fit the relationship of accumulative infiltration capacity,infiltration rates and infiltration durations of muddy water with different sediment gradations.The correlation is strong and the coefficients of determination are greater than 0.90. The results indicate that the sediment impact value with particle sizes smaller than 0. 01 mm is the main factor that affects muddy water infiltration. The study has found that the accumulative infiltration capacity and the sediment impact values of muddy water with different sediment gradations have an exponential function relationship for the same infiltration duration and that the infiltration rates and the sediment impact values of muddy water with different sediment gradations have a linear relationship for the same infiltration duration. In this paper,the relationship of parameters in the infiltration equations with the sediment impact value is built and the sediment impact value with particle sizes smaller than 0. 01 mm is used to characterize the closely correlated parameters.
作者
卞艳丽
曹惠提
张会敏
黄福贵
宋长吉
BIAN Yan-li;CAO Hui-ti;ZHANG Hui-min;HUANG Fu-gui;SONG Chang-ji(Yellow River Institute of Hydraulic Research of YRCC,Zhengzhou 450003,China)
出处
《节水灌溉》
北大核心
2018年第11期39-47,50,共10页
Water Saving Irrigation
基金
水利部技术示范项目(SF-201802)
中央级公益性科研院所专项资金项目(HKY-JBYW-2017-09
HKY-JBYW-2018-04)
关键词
浑水入渗
泥沙级配
粒径
泥沙影响值
入渗公式
含沙量
infiltration of muddy water
sediment gradation
particle size
sediment impact value
infiltration equation
sediment concentration
