Citation: | FU Changchang, LI Xiangquan, ZHANG Wenjing, CHENG Xu, BAI Zhanxue, LI Jinqiu. 2025. Water quality, genetic model, and potential development and use of the Hoh Xil Budongquan Spring on the northern Qinghai–Xizang Plateau[J]. Geology in China, 52(4): 1369-1380. doi: 10.12029/gc20220426002 |
This paper is the result of hydrogeological survey engineering.
Budongquan Spring is in the region of Hoh Xil on the northern Qinghai–Xizang Plateau. It is a typical sub−surface spring with discharge that ascends to the surface through taliks in the permafrost. It is an important water supply for the Qinghai–Xizang railway and the construction of small towns along the railway. Therefore, it is very important to understand its formation and water characteristics.
In this paper, we evaluated spring water quality using the single index evaluation method. We analyzed water storage, circulation, and sources of main chemical components by examining the local geology, environmental isotopes, and hydrochemistry.
Budongquan spring water quality is in class V throughout the year. It is in class V in terms of total hardness, SO42−, and Cl−, and in class I–II in terms of toxicological and heavy metal indices. Nearby glacier meltwater and river water are in class I–II. The spring is mainly recharged by glacial meltwater from the southern slope of Kunlun Mountains, atmospheric precipitation, and surface river water. Average cycle length is less than 5–10 years. Groundwater flow follows the talik zone along the northeast−trending active normal faults. Budongquan spring is formed by the surfacing of groundwater that is blocked by the west-northwest-trending active reverse faults. Its chemical composition is mainly determined by evaporation, and presence of and interaction with magnesium salts and carbonate rocks.
To meet standards for drinking water, we recommend mixing spring water with river water at a ratio of 1:2.
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Geological sketch of the study area and the distribution of sampling sites
Piper diagram of the different water bodies in the Budongquan region
Variation characteristics of main components exceeding standard in Budongquan Spring water during the year
Planar graph and profile of Budongquan Spring storage water structure in NE direction
Diagram of δD–δ18O (a) and the box plot of 3H content (b) in different water samples in Budongquan Spring region
Equivalent ratio diagram of the major ions in the different water bodies