评估许可豁免对地表水供应的影响:与气候变化和需求增长的比较

IF 2.6 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Laljeet Sangha, Daniel Hildebrand, Durelle Scott, Julie Shortridge
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引用次数: 0

摘要

美国东部许多州的取水法规都很有限,这给低流量时期的供水管理带来了巨大风险。虽然这些州都要求获得取水许可,但允许不受管制地取用地表水的祖父辈取水豁免也很常见。这种许可豁免给供水管理带来了挑战,因为许可豁免用户对允许取水量的充分利用可能会给维持充足的供水以满足当前和预期需求带来风险。本研究使用了弗吉尼亚州报告的许可豁免数据,以了解许可豁免取水的范围、数量以及对 30 天和 90 天低流量的潜在影响。本研究中使用的许可豁免取水量数值来自弗吉尼亚州环境质量部。许可豁免的最大取水量大大高于许可用户未来的预计需求量。这些取水量对干旱流量的影响与气候变化和需求增长带来的影响进行了比较。在 "干旱 "的未来气候变化情景下,流量普遍减少,而在豁免用户和需求增长情景下,影响则更为局部。在许多地区,在低流量时期,豁免用户的影响超过了气候变化和需求增长情景的影响。因此,需要更全面的水资源规划、政策和研究来应对许可豁免的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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

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

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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来源期刊
Journal of The American Water Resources Association
Journal of The American Water Resources Association 环境科学-地球科学综合
CiteScore
4.10
自引率
12.50%
发文量
100
审稿时长
3 months
期刊介绍: JAWRA seeks to be the preeminent scholarly publication on multidisciplinary water resources issues. JAWRA papers present ideas derived from multiple disciplines woven together to give insight into a critical water issue, or are based primarily upon a single discipline with important applications to other disciplines. Papers often cover the topics of recent AWRA conferences such as riparian ecology, geographic information systems, adaptive management, and water policy. JAWRA authors present work within their disciplinary fields to a broader audience. Our Associate Editors and reviewers reflect this diversity to ensure a knowledgeable and fair review of a broad range of topics. We particularly encourage submissions of papers which impart a ''take home message'' our readers can use.
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