水资源保护2016，Vol.32Issue(4)：11-20,10.DOI:10.3880/j.issn.1004-6933.2016.04.002
外源地下水补给二连浩特盆地
Allogenic groundwater recharge to Erenhot Basin
摘要
Abstract
In order to identify the source of groundwater recharge in Erenhot, the transforming relationships between atmospheric precipitation, surface water, soil water, and groundwater were studied through isotope geochemical analysis. Due to evaporation, the soil moisture remains lower than the maximum water holding capacity for a long period, and the infiltration of precipitation is not sufficient to change this situation. Compared with precipitation, the soil water is more depleted in deuterium and oxygen isotopes. Through comparison of deuterium and oxygen isotopes in soil water, groundwater, and local precipitation, it was found that the soil water is mainly recharged by groundwater. The isotopic composition of precipitation in the Qiangtang Basin, in Tibet, is similar to that of the groundwater in Erenhot, indicating that the groundwater in the Erenhot Basin is recharged by an allogenic water source. Ankerite, red clay, travertine, siliceous sinter, gypsum, and other minerals are widely distributed in the basalt eruption regions in the Erenhot Basin. Elements such as Fe, Mg, Ca, and Si in these minerals may come from deep-circulating groundwater. The formation of ankerite and red clay indicates that the deep-circulating groundwater goes through a high-temperature process. The allogenic water may come from the seepage of rivers and lakes in the Tibetan Plateau, and the deep-circulating groundwater recharges the groundwater of Erenhot ’ s volcanic basalt areas via volcanic lava pipes. Based on the principle of deep circulation of groundwater, four artesian wells have been drilled near the craters in Erenhot, with the flow capacity of a single well reaching 30 m3/h.关键词
氘氧同位素/同位素地球化学分析/羌塘盆地/铁白云岩/地下水补给源/二连浩特盆地Key words
deuterium and oxygen isotopes/isotope geochemical analysis/Qiangtang Basin/ankerite rock/groundwater recharge resource/Erenhot Basin分类
天文与地球科学引用本文复制引用
陈建生,王彦超,谢飞,徐燚,陈亚飞,詹泸成,江巧宁..外源地下水补给二连浩特盆地[J].水资源保护,2016,32(4):11-20,10.基金项目
国家自然科学基金(51578212) （51578212）
科技部“973”项目(2012CB417005) （2012CB417005）
