Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1029/2024WR038938 |
Lizenz  |
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| Titel (primär) | Responses of wetted river network contraction and expansion dynamics to prolonged drought |
| Autor | Li, Y.; Yang, X.; Lischeid, G.; Wollheim, W.; Jomaa, S.; Zhou, X.; Rode, M.
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| Quelle | Water Resources Research |
| Erscheinungsjahr | 2025 |
| Department | ASAM |
| Band/Volume | 61 |
| Heft | 6 |
| Seite von | e2024WR038938 |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Abstract | Intermittent rivers spread worldwide, but estimating them and their response to extreme climate conditions at the catchment scale, like prolonged drought, remains challenging. This study related river network dynamics to river-groundwater interaction and investigated the response of wetted river network contraction and expansion to prolonged drought by coupling a fully distributed hydrological model (mHM) with a groundwater model (MODFLOW). The coupled model was applied to the Bode catchment (3,200 km2) in central Germany from 2000 to 2022, with 2018–2022 considered a prolonged drought period. Results demonstrated good model performance when evaluated using discharge, groundwater table depth, and sampling data of river dryness and wetness. Compared to the reference period 2004–2017, in the lower Bode, 7% of the total river length shifted from water gain to water loss due to prolonged drought. The total gross river gain from groundwater dropped by 17%, with the decline primarily occurring in small streams. Meanwhile, the total gross river loss declined by 9%, driven by reduced instream flow during prolonged drought. The annual mean wetted river network contracted by 140 km due to the prolonged drought, with extended drying and reduced rewetting on a seasonal scale. River persistence declined significantly due to prolonged drought, with around 130 km of intermittent river shifted to totally dry. Based on this coupling approach, this study highlights the impact of prolonged drought on wetted river network dynamics, which, mediated by groundwater dynamics and their memory effects, can significantly change water resource distribution, thereby affecting ecosystem health and water quality. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=30921 |
| Li, Y., Yang, X., Lischeid, G., Wollheim, W., Jomaa, S., Zhou, X., Rode, M. (2025): Responses of wetted river network contraction and expansion dynamics to prolonged drought Water Resour. Res. 61 (6), e2024WR038938 10.1029/2024WR038938 |
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