微咸水灌溉对地下水补给和土壤水盐运移的影响分析-influence of brackish water irrigation on groundwater recharge and soil water and salt transportation.docx

西安理工大学硕士学位论文  PAGE 2 本论文得到以下课题资助： 1、新疆绿洲灌区节水关键技术和用水安全研究与示范(2011130103-3)； 2、水利部公益性行业科研专项经费项目：地下水开发与绿洲安全用水关键技术研究 (201301102)； 3、陕西省科学技术研究发展计划项目（2012JM7007）； 4、陕西省教育厅基金项目（11JS076）；  Abstract Title: Study on the effects of groundwater recharges and soil water and salt movement under brackish water irrigation Subject: Agricultu 陀 Soil and Water Engineering Author: Fei Xu Signature:μ; 队 Advisor: Associate Prof. Wenjuan SHI Signatu陀: I1)ρ岛..1)，，，， rLf Abstract Korla 缸ea shortages of 企eshwater resources and large saline-alkali land，drip irrigation combine with brackish water will broad application prospects. But improper irrigation will not only crop production ，but also make soil salinization. Groundwater recharges supplies crop water，but also cause soil salinization. Therefore，how to conduct a rationaI use of brackish water drip irrigation，reasonable regulation of soil water and salt，for the sustainable development of oasis agriculture is important. This paper taking the measured experimental data， and use theoretical anaIysis，made studies on the soil water and salt movement and groundwater recharges by brackish water irrigation in Korla area，main conclusions show 由at: Soil effective temperature decreases with irrigation quantity increasing，and irrigation quantity quadratic parabola. The cumulative groundwater recharges and irrigation are the linear relationship. In July and August groundwater recharges pe由rmance of the evening is greater than daytime，at other times performance of daytime greater than evening. Groundwater recharges recharge groundwater depths are the exponentiaI relationship . Groundwater recharges decrease with the increase of groundwater d巳pths. The average soil salinity and groundwater depths are the parabola relationship. Groundwater depth more shallow the total saIinity of cotton root zone and the saIt comes from groundwater recharges are bigger， the relationship between the proportions of salt ∞mes from groundwater recharges