【摘要】 渭干河是新疆著名大河之一,是渭干河绿洲的塑造者,该绿洲的生存和发展与灌区水资源利用关系密切。渭干河灌区环境恶化主要是在自然及人为因素共同作用下形成的。灌区分布于独立而封闭的冲积扇上,原生土壤普遍含盐,加之长期以来重灌轻排,土壤次生盐渍化严重。本文根据渭干河灌区多年水盐监测资料,探讨灌区多年来的水盐动态变化及其耦合关系。研究表明:灌区盐分来源主要为引水携盐,灌区排水是灌区盐分去处的主要途径;灌区地下水埋深,地下水水质存在时间和空间上的变化,地下水状况决定水化学类型。更多还原

【Abstract】 The irrigation district is located on the alluvial fan which is independent and close,so the parent material of soil is salt-bearing generally.As a result of the unreasonable irrigation mode,the soil salinization problems were becomeing more and more serious.According to the many years monitor data of water and salt in Weigan River irrigation district,the dynamic changes of water and salt and their coupling relationships were discussed.The results indicated that the irrigation district salinity originates mainly from Weigan River,and the drainage of irrigation district was the main outlet of salinity;Changes of groundwater depth and groundwater quality existed temporal and spatial rule,meanwhile,groundwater condition controlled the hydrochemistry type.更多还原