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.
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