地下水浅埋区土壤水TDS变化规律分析

Study on Variation and Influence Factor of Soil-water TDS in Shallow Groundwater Areas

土壤水的研究对农田水利、水文地质、生态与环境等具有很重要的意义,本文研究了黄河三角洲地区土壤水TDS变化规律及其影响因素。在研究区设立了3个试验点,分别观测裸地、棉花地和芦苇地包气带水分变化,并利用陶土头负压法获取各试验点不同深度的土壤水样。水样分析结果表明,土壤水的TDS主要与地表覆盖类型、包气带岩性和地下水及其埋深有关。

The study on soil-water is important for farm, conservancy, hydrogeology and environment. This paper introduced the method and equipment for getting soil water in carrying out the project named study on the moisture movement in unsaturated zone in the Yellow River delta. The variation and influence factor of soil-water mineral degree is analyzed by using the assaying result of water sample. The follow are the main conclusions: In shallow groundwater areas, the variation of soil water is connected with groundwater; the effect of evaporation and transpiration on soil water are different. The evaporation increases mineral degree of up layer soil water, the vegetation decreases the mineral degree when they are growing; groundwater, vegetation and the character of soil is the important influence factor of soil-water mineral degree in shallow groundwater areas.