Hydrochemistry and Isotopic Characteristics of Various Types of Water Bodies in Ruoergai Wetland and their Water Recharge Relationship
In order to explore the water environment characteristics and water recharge relationship of the Ruoergai Wetland,Heihe River water,marsh water and groundwater samples were collected in the summer of 2019,2020 and 2021.The water chemistry and stable hydrogen and oxygen isotope characteristics of different water bodies were analyzed,and the recharge ratio between different water bodies was estimated using the endmember mixture model.The results showed that atmospheric precipitation was the initial recharge source of all kinds of water,and the groundwater in the middle and lower reaches of the Heihe River trunk stream and the northwest was greatly affected by precipitation.The recharge ratio of the middle and upper reaches of the Heihe River trunk stream from the southern marsh,the southern Heihe River tributary and precipitation was 68.52％,22.76％and 8.72％,respectively.The northern outlet Heihe River tributary recharged by northern marsh and precipitation was 62.88％and 37.12％.The main source of groundwater recharge in the southeast comes from the northern Heihe River tributary leading into the lake and the middle and upper reaches of the mainstream,ac-counting for 67.88％and 32.12％,respectively.In the northwest,groundwater recharge was 88.59％and 11.41％in the middle and lower reaches of the mainstream and southern marsh,respectively.
precipitationriver watermarsh watergroundwaterRuoergai wetlandhydrochemistryhydrogen and oxygen isotopes
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万方数据
