入渗水矿化度对土壤入渗特征和离子迁移特性的影响  

Effect on Both Soil Infiltration Characteristics and Ion Mobility Features by Mineralization Degree of Infiltration Water

作　　者：吴忠东[1] 王全九[2] 

机构地区：[1]山东理工大学资源与环境工程学院,淄博255049 [2]西安理工大学水利水电学院,西安710048

出　　处：《农业机械学报》2010年第7期64-69,75,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50879067);中国科学院知识创新工程重要方向项目(KSCX2-YW-N-003);陕西省重点学科建设专项资金资助项目

摘　　要：为开发利用浅层地下劣质水,进行均匀土柱一维垂直入渗实验,对矿化度不同的入渗水在土柱中入渗后的剖面含水率分布和土壤入渗率进行了分析,并对土壤剖面的含盐量以及入渗后盐分降低区深度随入渗水矿化度的变化规律进行了研究。结果表明,含盐水入渗能够改变土壤结构,并增强土壤导水和持水能力,但随着进入土壤中的钠离子数量增加,土壤的导水和持水能力并非由矿化度一个因素决定,而是由入渗水矿化度和钠离子数量共同决定。当矿化度低于3 g/L左右时仍可以对土壤上层的盐分有一定的淋洗作用,但当矿化度进一步升高时,入渗水对供试土壤的盐分几乎没有淋洗作用。One-dimensional perpendicular infiltration process to water with different mineralization degree by uniformity earth pillar experiments was studied.Soil moisture content distribution and infiltration rate infiltrated by different mineralization degree were analyzed.The variance in regular pattern of soil profile salt content as well as desalt depth after infiltration in response to mineralization degree of infiltrated water were carried out at the same time.The results showed that saline water infiltration could transform soil structure and enhance both soil water transmitting ability and moisture holding capacity,but in company with sodium ion in soil increasing,soil water transmitting ability and moisture holding capacity did not depend only on mineralization degree,but rather codetermined by both mineralization degree and sodium ion quantity;top soil salt would be infiltrated by water when mineralization degree lowered about 3g/L,but soil salt was scarcely infiltrated when mineralization degree further increased.

关 键 词：地下水 积水入渗 矿化度 含水率 盐分降低区深度 

分 类 号：S273.4[农业科学—农业水土工程]