Subjects: Geosciences >> Geography submitted time 2023-12-16 Cooperative journals: 《干旱区研究》
Abstract： The Bortala River Basin in Xinjiang is short of water resources and is unevenly distributed in time and space. It is important to quantitatively calculate the conversion rates of the surface water and groundwater in different reaches of the basin and as well as at different periods for the purposes of groundwater exploitation and replenishment and for the optimal allocation of water resources. Based on the daily flow measurement data from five monitored sections in the middle reaches of Bortala River from December 1, 2021, to November 30, 2022, Using river runoff analysis method, combined with the P-III distribution frequency curve, comparisons of water quantity between different monitoring sections, and hydrogeological cross-sections. The relationship between the infiltration rate and the runoff in the leaking river section was also fitted. The results showed that: (1) among the five monitoring stations, Bole Hydrology Station had the largest annual runoff, while Chaxiang Bridge had the smallest; (2) the runoff in the middle reaches of Bortala River was in a normal flow year year of 2022. (3) in the upper part of the middle reaches of the Bortala River, groundwater is converted to recharge surface water; The surface water in the section that runs from the Kundelun canal head to Chaxiang Bridge has a large amount of infiltration to recharge groundwater (infiltration coefficient: 0.67), and the infiltration rate was found to be significantly negatively correlated with the quantity of incoming water; In the lower part, groundwater spilled over the surface. The middle reaches of the Bortala River experienced three conversions of surface water and groundwater, with an overall performance of groundwater overflow supplementing surface water.
Subjects: Geosciences >> Geography submitted time 2022-01-26 Cooperative journals: 《干旱区研究》
Abstract：采用水量平衡法、实地勘查和遥感影像数据相结合的方式，阐述了生态输水后河道输水方式变化对河床渗透性能演变、不同输水方式下水环境响应特征；分析了输水后塔里木河下游河道的耗水率和河床透水性规律以及生态闸后近自然漫溢下的MNDWI变化特征。结果表明：（1）持续输水河道的波涌灌效应会增强，减少对地下水补给量；（2）以库木吐格为代表的生态闸后的随机化输水，缺乏合理调控，形成了常流水河段，导致部分区域地下水位过高，潜水蒸发量增加；（3）以博孜库勒为代表的近自然方式下的沟汊漫溢对该区域地下水位及植被恢复起到了重要作用，但随着输水沟汊的固化与积水面的形成，出现由旱区植被向以芦苇为代表的湿地植被景观演化的现象，导致水面蒸发量增加；（4）缺乏调控下的生态闸与近自然方式下输水均产生了一定面积的水域和湿地植被。对地处干旱的塔里木河流域来说，应遵循河流伦理的要求，通过人工干预下的调控输水，采用汊河轮渗与漫溢相结合的输水方式，不仅可提高下泄水量的利用效率，进一步扩大生态修复区域，而且可实现对不同恢复目标区水量耗散的调控，达到植被恢复面积的最大化。
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