An innovative approach to rainwater harvesting for irrigation based on El Niño Southern Oscillation forecasts

Sangha, Laljeet; Lamba, Jasmeet; Kumar, Hemendra; Srivastava, Puneet; Dougherty, Mark; Prasad, Ram

doi:10.2489/jswc.2020.00085

Cited by 7 publications

(1 citation statement)

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“…For instance, during a 30‐day low‐flow period, oxygen depletion has been observed in a severely infested section of a river (Effler et al., 1998). Such low‐flow conditions play a crucial role in shaping the biotic composition, structure, and function of aquatic, wetland, and riparian ecosystems (Richter et al., 1996; Sangha, Lamba, Kumar, Srivastava, et al., 2020). Similarly, the 2040 demand scenario shows high reductions in flows in certain potential areas of high‐water demand, while other locations where demand is projected to decrease see flow increases.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of surface water supply impacts from permit exemptions: A comparison with climate change and demand growth

Sangha,

Hildebrand,

Scott

et al. 2024

J American Water Resour Assoc

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Many states in the Eastern U.S. have limited water withdrawal regulations, posing significant risks to water supply management during periods of low flows. While these states require water withdrawal permits, exemptions for grandfathered withdrawals that allow unregulated access to surface water are common. Such permit exemptions present a challenge to water supply management, as full utilization of allowable withdrawals by permit‐exempt users could pose risks to maintaining adequate water supplies for current and projected demand. This study used reported permit exemption data in Virginia to understand the extent, volume, and potential impact of permit‐exempt withdrawals on 30‐ and 90‐day low flows. The permit‐exempt withdrawal values used in this study were obtained from Virginia Department of Environmental Quality. Maximum permit‐exempt withdrawal volumes were significantly higher than projected future demands in permitted users. The impacts of these withdrawals on drought flows were compared with the impacts presented by climate change and demand growth. Widespread reduction in flows was observed with the “dry” future climate change scenario, while impacts were more localized in the exempt users and the demand growth scenarios. The impacts of exempt users exceeded the impact of climate change and demand growth scenarios in many regions during low‐flow periods. Therefore, more comprehensive water planning, policy and research is needed to address the impact of permit exemptions.

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Section: Discussionmentioning

confidence: 99%