伊犁黄土水分入渗规律试验研究  

Experimental study on water influence law of Yili Loess

作　　者：弋鹏飞 张建鹏 马瑞 马奭文 李永发 YI Peng-fei;ZHANG Jian-peng;MA Rui;MA Shi-wen;LI Yong-fa(College of Physics Science and Technology,Yili Normal University,Yi ning,Xinjiang 835000,China;College of Water Conservancy and Hydro-power,Hohai University,Nanjing 210098,China)

机构地区：[1]伊犁师范大学物理科学与技术学院,新疆伊宁835000 [2]河海大学水利水电学院,江苏南京210098

出　　处：《地下水》2024年第3期119-122,共4页Ground water

基　　金：伊犁师范大学校级科研项目(2022YSYY001,CXZK2021028,BSZX2021014)。

摘　　要：为了了解伊犁黄土水分入渗规律,在伊宁市北岸干渠边坡采样,进行了一维土柱积水入渗、变水头测定黄土渗透系数试验。结果表明,黄土湿润锋前进距离、累积入渗量随时间呈幂函数递增关系,入渗率随时间呈幂函数递减关系,用Kostiakov公式建立了伊犁黄土入渗模型。随着黄土干密度增大,累积入渗量加大,湿润锋运移速率减弱,到达渗透阶段时间延长,入渗率减小且逐渐趋于稳定,干密度较大的黄土稳渗率较小。采用TST-55型渗透仪通过变水头试验得到了伊宁市北岸干渠黄土饱和渗透系数在2.25×10^(-4)~2.32×10^(-5)cm/s,拟合了干密度与饱和渗透系数的关系式,表明干密度与饱和渗透系数呈负指数函数关系。In order to understand the water infiltration law of Yili loess,samples were taken from slope of the north bank channel in Yining City,one-dimensional soil column infiltration,variable water head measurement of loess permeability coefficient were carried out in the laboratory.The results showed that the advance distance of loess wetting front and cumulative infiltration increase with time,and infiltration rate decrease with time,which established the Yili loess infiltration model using Kostiakov formula.With the increase of dry density of loess,the wetting front migration rate were decreases,the cumulative infiltration increase,and the time to reach the penetration stage is prolongate,the infilatration rate decreases and gradually stabilizes,which loess with higher dry density has lower stable infiltration.The saturated permeability coefficient of loess measured is between2.25×10^(-4)~2.32×10^(-5)cm/s by TST-55 Osmosis apparatus,and the relationship between dry density and saturated permeability coefficient was fitted,indicated a negative exponential function relationship between them.

关 键 词：伊犁黄土 入渗率 干密度 饱和渗透系数 

分 类 号：S152.71[农业科学—土壤学]