Potential cumulative impacts on river flow volume from increased groundwater extraction under the Murray-Darling Basin Plan

IF 2.4 Q2 WATER RESOURCES

Australasian Journal of Water Resources Pub Date : 2020-07-02 DOI:10.1080/13241583.2020.1804042

G. Walker, Quan J. Wang, A. Horne, Rick Evans, S. Richardson

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引用次数: 9

Abstract

ABSTRACT A risk assessment of the reduction of streamflow in the Murray-Darling Basin (MDB) from potential increased groundwater extraction has been conducted. This incorporates the uncertainty of future extraction and connectivity between groundwater and surface water. The predicted impact from forty years of growth in extraction is less than 580 Gl/y, and likely to be in range of 100–400 Gl/y. Over 80% of this impact will result from extraction under limits existing before the Basin Plan, with most impact from extraction outside these limits occurring later. Groundwater units with high risk lie within a range of river valleys and hydrogeological domains, and particularly the Goulburn valley and zones of fresher groundwater discharge. Management rules in the new groundwater management plans are designed to reduce use in high impact zones. Monitoring is required to assess effectiveness of these as use increases and conjunctive water management becomes more common.

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根据墨累-达令盆地计划，增加地下水开采对河流流量的潜在累积影响

摘要对墨累-达令盆地（MDB）因潜在的地下水开采量增加而导致的流量减少进行了风险评估。这包括了未来开采的不确定性以及地下水和地表水之间的连通性。40年开采增长的预测影响小于580 Gl/y，可能在100–400 Gl/y之间。超过80%的影响将来自盆地规划之前存在的限制范围内的开采，而这些限制范围外的开采的大部分影响将在稍后发生。高风险地下水单元位于河谷和水文地质区域的范围内，尤其是古尔本河谷和新鲜地下水排放区。新地下水管理计划中的管理规则旨在减少高影响区的使用。随着使用量的增加和联合用水管理变得越来越普遍，需要进行监测以评估这些措施的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Australasian Journal of Water Resources WATER RESOURCES-

CiteScore

5.10

自引率

21.90%

发文量

期刊介绍： The Australasian Journal of Water Resources ( AJWR) is a multi-disciplinary regional journal dedicated to scholarship, professional practice and discussion on water resources planning, management and policy. Its primary geographic focus is on Australia, New Zealand and the Pacific Islands. Papers from outside this region will also be welcomed if they contribute to an understanding of water resources issues in the region. Such contributions could be due to innovations applicable to the Australasian water community, or where clear linkages between studies in other parts of the world are linked to important issues or water planning, management, development and policy challenges in Australasia. These could include papers on global issues where Australasian impacts are clearly identified.