适应性（再）操作促进多目标水库下游环境流量的维持
Adaptive (re)operations facilitate environmental flow maintenance downstream of multi-purpose reservoirs
AI总结：
研究多目标水库下游最小环境流量(MEF)释放对其他部门效益的影响，通过构建多目标决策模型分析印度Nagarjuna Sagar水库，发现优先释放MEF能在不显著影响其他目标的情况下满足环境流量需求。
摘要：
多目标水库通过提供灌溉、生活用水、水电和其他服务来支持社会经济发展。然而，蓄水会影响河流水生生态系统。因此，最小环境流量（MEFs）的概念被确立，通过规定大坝下游需维持的最低流量来恢复自然流动河流的效益。但多目标水库运行所处的不同法律背景并不总是需要释放MEF。释放MEF在多大程度上影响其他部门的效益，仍是一个开放且可能因地点而异的问题。一个相关问题是——释放的优先顺序如何影响各部门的绩效？我们针对印度南部最大的多目标水库之一Nagarjuna Sagar水库分析了这些问题。我们构建了多目标决策问题的两个版本。PF_MEF公式将MEF释放优先于满足用水需求的释放，其次是水电释放。PF_nMEF公式遵循区域立法规则，首先释放以满足需求，其次是水电和MEF释放。结果表明，优先释放MEF能够满足MEF需求，且不会对其他目标造成显著妥协。我们假设，类似的调查可能会揭示简单的释放顺序修改如何提高其他水库实现环境目标的能力。
英文摘要：
Multi-purpose reservoirs support socioeconomic development by providing irrigation, domestic water supply, hydropower, and other services. However, impoundment of water impacts instream aquatic ecosystems. Thus, the concept of minimum environmental flows (MEFs) was established to restore the benefits of naturally flowing rivers by specifying minimum flow rates to be maintained downstream of dams.But varying legislative contexts under which multi-purpose reservoirs operate may not always necessitate MEF releases. To what extent the release of MEF affects other sectoral benefits remains an open-ended and possibly a site-specific inquiry. A related issue is - how does the order in which releases are prioritized influences sectoral performances? We analyse these issues for the Nagarjuna Sagar reservoir, one of the largest multipurpose reservoirs in southern India. We formulate two versions of a multi-objective decision problem. PF_MEF formulation prioritizes MEF releases over releases for water demand satisfaction, followed by hydropower releases. PF_nMEF formulation follows the regional legislative rule releasing first for demand satisfaction, followed by hydropower and MEF releases. Results thus indicate that prioritizing MEF releases improves can meet MEF requirements without significant compromises in other objectives. We hypothesize that similar investigations may reveal how simple modification of release order may improve ability of other reservoirs to meet environmental goals.
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