Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1002/hyp.70174 |
Licence  |
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| Title (Primary) | Stable isotope characteristics and recharge mechanisms of river, lake and groundwater by precipitation in the Hulun Lake basin |
| Author | Du, C.; Kong, X.; Sun, D.; Xue, Y.; Zhang, C.; Xue, B. |
| Source Titel | Hydrological Processes |
| Year | 2025 |
| Department | SEEFO |
| Volume | 39 |
| Issue | 6 |
| Page From | e70174 |
| Language | englisch |
| Topic | T5 Future Landscapes |
| Keywords | groundwater; Hulun Lake; precipitation; recharge mechanisms; river water; stable isotope |
| Abstract | The characteristics of hydrological cycling remain highly uncertain in lake basins at the edge of a monsoon area, particularly during the wet season, which accounts for a predominant amount of annual precipitation (> 50%). To address this challenge, we strategically selected Hulun Lake, the largest freshwater lake in northern China, as the study site. A total of 245 samples of precipitation, river water, groundwater and lake water were collected during the wet season. We analysed their hydrogen and oxygen isotopic characteristics and their relationships to elucidate the recharge mechanisms between different water bodies via isotope conservation and endmember element mixing models. The key findings were as follows. (1) In terms of the changes in precipitation isotopes, the precipitation isotopes gradually depleted with time, whereas the isotopes of lake water, groundwater and river water were relatively stable. (2) On this basis, the local meteoric water line (LMWL) of the lake basin during the wet season was established as δD = 7.11 × δ18O − 5.36 (R2 = 0.89), and the slope and intercept were slightly lower than those at the global and national levels. Specifically, the slopes and intercepts of the lake water line, groundwater line and river water line were similar but distinct from those of the local meteoric water line. (3) In terms of recharge processes and interactions, precipitation had a recharge effect on the other three water bodies, and different water bodies had strong interactions, regardless of their intermediary mutual recharge processes. Collectively, our results suggested that river water was the main recharge source of the lake, with a recharge rate of 42.9%, followed by groundwater (9.3%) and precipitation (1.5%). Our findings revealed the distinct roles of rivers and precipitation in recharging lakes in arid lake basins during the wet season. Therefore, this research is highly relevant for the management of local water resources and provides a reference for hydrological research in similar regions worldwide. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=30841 |
| Du, C., Kong, X., Sun, D., Xue, Y., Zhang, C., Xue, B. (2025): Stable isotope characteristics and recharge mechanisms of river, lake and groundwater by precipitation in the Hulun Lake basin Hydrol. Process. 39 (6), e70174 10.1002/hyp.70174 |
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