Your search found 3 records
1 Zipper, S. C.; Farmer, W. H.; Brookfield, A.; Ajami, H.; Reeves, H. W.; Wardropper, C.; Hammond, J. C.; Gleeson, T.; Deines, J. M. 2022. Quantifying streamflow depletion from groundwater pumping: a practical review of past and emerging approaches for water management. Journal of the American Water Resources Association, 58(2):289-312. [doi: https://doi.org/10.1111/1752-1688.12998]
Groundwater depletion ; Pumping ; Water Management ; Stream flow ; Surface water ; Aquifers ; Watershed management ; Water use ; Statistical models ; Analytical methods ; Decision support systems ; Uncertainty ; Ecosystems ; Evapotranspiration
(Location: IWMI HQ Call no: e-copy only Record No: H050944)
https://onlinelibrary.wiley.com/doi/epdf/10.1111/1752-1688.12998
https://vlibrary.iwmi.org/pdf/H050944.pdf
https://vlibrary.iwmi.org/pdf/H050944.pdf
(1.19 MB) (1.19 MB)
Groundwater pumping can cause reductions in streamflow (“streamflow depletion”) that must be quantified for conjunctive management of groundwater and surface water resources. However, streamflow depletion cannot be measured directly and is challenging to estimate because pumping impacts are masked by streamflow variability due to other factors. Here, we conduct a management-focused review of analytical, numerical, and statistical models for estimating streamflow depletion and highlight promising emerging approaches. Analytical models are easy to implement, but include many assumptions about the stream and aquifer. Numerical models are widely used for streamflow depletion assessment and can represent many processes affecting streamflow, but have high data, expertise, and computational needs. Statistical approaches are a historically underutilized tool due to difficulty in attributing causality, but emerging causal inference techniques merit future research and development. We propose that streamflow depletion-related management questions can be divided into three broad categories (attribution, impacts, and mitigation) that influence which methodology is most appropriate. We then develop decision criteria for method selection based on suitability for local conditions and the management goal, actionability with current or obtainable data and resources, transparency with respect to process and uncertainties, and reproducibility.
2 Gleeson, T.; Huggins, X.; Connor, R.; Arrojo-Agudo, P.; Sune, E. V.; Villholth, Karen; Rohde, M.; van der Gun, J.; Kreamer, D.; Manzano, M.; Scrinzi, L.; Arduino, G.; Resende, T. C.; Moosdorf, N.; Walsh, V.; Harjung, A. 2022. Groundwater and ecosystems. In UNESCO World Water Assessment Programme (WWAP). The United Nations World Water Development Report 2022: groundwater: making the invisible visible. Paris, France: UNESCO. pp.89-100.
(Location: IWMI HQ Call no: e-copy only Record No: H051031)
(2.77 MB)
3 Wang-Erlandsson, L.; Tobian, A.; van der Ent, R. J.; Fetzer, I.; te Wierik, S.; Porkka, M.; Staal, A.; Jaramillo, F.; Dahlmann, H.; Singh, C.; Greve, P.; Gerten, D.; Keys, P. W.; Gleeson, T.; Cornell, S. E.; Steffen, W.; Bai, X.; Rockstrom, J. 2022. A planetary boundary for green water. Nature Reviews Earth and Environment, 3(6):380-392. [doi: https://doi.org/10.1038/s43017-022-00287-8]
Freshwater ; Water availability ; Climate change ; Resilience ; Risk ; Soil moisture ; Precipitation ; Vegetation ; Evaporation ; Hydroclimatology ; Biogeochemical cycle ; Carbon cycle ; Ecosystems ; Governance ; Deforestation ; Drylands
(Location: IWMI HQ Call no: e-copy only Record No: H051114)
(1.67 MB)
Green water — terrestrial precipitation, evaporation and soil moisture — is fundamental to Earth system dynamics and is now extensively perturbed by human pressures at continental to planetary scales. However, green water lacks explicit consideration in the existing planetary boundaries framework that demarcates a global safe operating space for humanity. In this Perspective, we propose a green water planetary boundary and estimate its current status. The green water planetary boundary can be represented by the percentage of ice-free land area on which root-zone soil moisture deviates from Holocene variability for any month of the year. Provisional estimates of departures from Holocene-like conditions, alongside evidence of widespread deterioration in Earth system functioning, indicate that the green water planetary boundary is already transgressed. Moving forward, research needs to address and account for the role of root-zone soil moisture for Earth system resilience in view of ecohydrological, hydroclimatic and sociohydrological interactions.
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