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Quantifying Tradeoffs Associated with Hydrologic Environmental Flow Methods

机译：定量权衡与水文环境流量方法

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摘要

Freshwater management requires balancing and tradingoff multiple objectives, many of which may be competing. Ecological needs for freshwater are often described in terms of environmental flow recommendations (e.g., minimum flows), and there are many techniques for developing these recommendations, which range from hydrologic rules to multidisciplinary analyses supported by large teams of subject matter experts. Although hydrologic rules are well acknowledged as overly simplified, these techniques remain the state-of-the-practice in many locations. This article seeks to add complexity to the application of these techniques by studying the emergent properties of hydrologic environmental flow methodologies. Two hydrologic rules are applied: minimum flow criteria and sustainability boundaries. Objectives and metrics associated with withdrawal rate and similarity to natural flow regimes are used to tradeoff economic and environmental needs, respectively, over a range of flow thresholds and value judgments. A case study of hypothetical water withdrawals on the Middle Oconee River near Athens, Georgia is applied to demonstrate these techniques. For this case study, sustainability boundaries emerge as preferable relative to both environmental and economic outcomes. Methods applied here provide a mechanism for examining the role of stakeholder values and tradeoffs in application of hydrologic rules for environmental flows.
机译：淡水管理需要平衡和权衡多个目标，其中许多目标可能相互竞争。通常根据环境流量建议（例如最小流量）来描述淡水的生态需求，并且有许多制定这些建议的技术，从水文法则到大型主题专家小组支持的多学科分析。尽管人们公认水文法则过于简化，但这些技术在许多地方仍然是当前的做法。本文旨在通过研究水文环境流量方法的新兴特性，为这些技术的应用增加复杂性。应用了两个水文规则：最小流量标准和可持续性边界。在一定的流量阈值和价值判断范围内，分别使用与退出率和与自然流量机制相似的目标和度量来权衡经济和环境需求。以佐治亚州雅典附近的中奥科尼河的假设取水为例，以证明这些技术。在本案例研究中，相对于环境和经济结果，可持续性界限显得更为可取。此处采用的方法提供了一种机制，可以检查利益相关者的价值和权衡在应用环境水文水文规则中的作用。

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