微咸水矿化度对重度盐碱土壤入渗特征的影响  

Effect of mineralization degree of infiltration water on infiltration characteristics of severely saline-alkali soil

作　　者：刘小媛[1] 高佩玲[1,2] 张晴雯[3] 王乃江[1] 赵连东[1] 

机构地区：[1]山东理工大学农业工程与食品科学学院,山东淄博255000 [2]山东理工大学资源与环境工程学院,山东淄博255000 [3]中国农业科学院农业环境与可持续发展研究所,北京100086

出　　处：《干旱地区农业研究》2018年第1期102-107,共6页Agricultural Research in the Arid Areas

基　　金：国家水体污染控制与治理科技重大专项(2015ZX07203-007);国家自然科学基金(41402208);山东省自然科学基金(ZR2011EL020);山东省自然科学基金项目(ZR2016EEM34);国家级大学生创新创业训练计划项目(201510433047)

摘　　要：通过微咸水室内一维垂直入渗试验,分析了淡水以及4种不同矿化度(2,3,4,5 g·L^(-1))微咸水对重度盐碱土壤累积入渗量、湿润锋运移深度、土壤含水率、入渗历时、入渗速率的影响。结果表明:累积入渗量、湿润锋运移深度、土壤含水率随微咸水矿化度的增加呈现增大的趋势,但与淡水相比,2,3,4,5 g·L^(-1)微咸水的累积入渗量、湿润锋运移深度随入渗时间的变化差异较小;同一土层,土壤含水率大小比较:淡水<5 g·L^(-1)<3 g·L^(-1)<2 g·L^(-1)<4 g·L^(-1);在微咸水灌溉条件下,累积入渗量与湿润锋运移深度呈线性关系。采用Kostiakov模型,Philip模型和Green-Ampt模型模拟微咸水入渗过程,结果显示,Kostiakov模型可以更好地描述重度盐碱土入渗率与入渗时间的关系。One-dimension vertical water infiltration experiments were conducted using a vertical soil column.The study was conducted to study the relations between cumulative infiltration,wetting front depth,soil moisture content,infiltration rate and infiltration time under different mineralization degree of infiltration water. The results showed that cumulative infiltration,wetting front depth,soil moisture content increased with the mineralization degree of infiltration water. However,compared with fresh water,the changes of wetting front depth and cumulative infiltration of 2,3,4 g·L^(-1) and 5 g·L^(-1) is smaller. In the same depth of soil,soil moisture content was characterized by fresh water <5 g·L^(-1)<3 g·L^(-1)<2 g·L^(-1)<4 g·L^(-1). Cumulative infiltration was in good linear relationship with wetting front depth under brackish water irrigation. The Kostiakov infiltration model,Philip infiltration model and Green-Ampt infiltration model was compared in terms of quantifying saline water infiltration process,by which Kostiakov model was proposed.

关 键 词：微咸水 湿润锋 累积入渗量 土壤含水率 入渗率模型 

分 类 号：S152.72[农业科学—土壤学] S278[农业科学—农业基础科学]