Abstract
AbstractComprehensive management of karst water resources requires sufficient understanding of their dynamics and karst-specific modeling tools. However, the limited availability of observations of karstic groundwater dynamics has been prohibiting the assessment of karst water resources at regional to global scales. This paper presents the first global effort to integrate experimental approaches and large-scale modeling. Using a global soil-moisture monitoring program and a global database of karst spring discharges, the simulations of a preliminary global karstic-groundwater-recharge model are evaluated. It is shown that soil moisture is a crucial variable that better distinguishes recharge dynamics in different climates and for different land cover types. The newly developed dataset of karst spring discharges provides first insights into the wide variability of discharge volumes and recharge areas of different karst springs around the globe. Comparing the model simulations with the newly collected soil-moisture and spring-discharge observations, indicates that (1) improvements of the recharge model are still necessary to obtain a better representation of different land cover types and snow processes, and (2) there is a need to incorporate groundwater dynamics. Applying and strictly evaluating these improvements in the model will finally provide a tool to identify hot spots of current or future water scarcity in the karst regions around the globe, thus supporting national and international water governance.
Funder
Deutsche Forschungsgemeinschaft
Publisher
Springer Science and Business Media LLC
Subject
Earth and Planetary Sciences (miscellaneous),Water Science and Technology
Reference78 articles.
1. Allocca V, Manna F, De Vita P (2014) Estimating annual groundwater recharge coefficient for karst aquifers of the southern Apennines (Italy). Hydrol Earth Syst Sci 18:803–817. https://doi.org/10.5194/hess-18-803-2014
2. Arnold S, Bulovic N, McIntyre N, Finch WK, Larsen JR, Reading LP, Baumgartl T (2020) Event-based deep drainage and percolation dynamics in vertosols and chromosols. Hydrol Process 34:370–386. https://doi.org/10.1002/hyp.13592
3. Baker A, Berthelin R, Cuthbert MO, Treble, PC, Hartmann, A and The KSS Cave Studies Team (2020) Rainfall recharge thresholds in a subtropical climate determined using a regional cave drip water monitoring network. J Hydrol 587:125001. https://doi.org/10.1016/j.jhydrol.2020.125001
4. Beck HE, Wood EF, Pan M, Fisher CK, Miralles DG , Van Dijk AIJM , McVicar TR, Adler RF (2019) MSWep v2 global 3-hourly 0.1° precipitation: methodology and quantitative assessment. Bull Am Meteorol Soc 100:473–500. https://doi.org/10.1175/BAMS-D-17-0138.1
5. Berthelin R, Hartmann A (2020) The shallow subsurface of karst systems: review and directions. In: Bertrand C, Denimal S, Steinmann M, Renard P (eds) Advances in karst science. Springer, Cham, Switzerland, pp 61–68
Cited by
15 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献