论文部分内容阅读
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。
The Weigan River, one of the famous rivers in Xinjiang, is the oasis of Weigan River. The survival and development of this oasis is closely related to the utilization of water resources in the irrigation area. Weigan River Irrigation District, the deterioration of the environment is mainly formed by the natural and human factors formed. The irrigated areas are distributed on independent and closed alluvial fans, and the salt content of the primary soil is generally high. In addition, heavy irrigation and light drainage have been carried out for a long time, causing serious secondary salinization of the soil. According to the monitoring data of water and salt in Weigan River irrigation area for many years, this paper discusses the dynamic changes of water and salt and their coupling relations over the years in irrigated area. The results show that the main source of salt in the irrigation area is water diversion and salt carrying. The drainage of irrigation area is the main way of salt removal in the irrigation area. The groundwater depth and groundwater quality in irrigation area vary with time and space. The groundwater condition determines the type of water chemistry.