Collaborative Research: Cross-Scale Interactions & the Design of Adaptive Reservoir Operations

该项目解决了缓解洪旱灾害的两个关键问题：在最大限度地减少洪灾和干旱风险之间的权衡，以及在选择在系统的哪个地方投资于缓解风险方面的权衡。该项目将通过在不同的水文气候和治理环境下的详细案例研究来研究这些权衡：加利福尼亚州的门多西诺湖和湖北省的丹江口水库，中国。在这两种情况下，水资源管理人员都在探索使用径流预报来改善水库调度，以便在不断变化的条件下进行防洪和供水。该项目将收集和分析有关水文、基础设施和决策的数据，以研究业务变化的影响，并确定促进适应的战略。将开发一个模型，以测试在不同的环境和社会环境中，减少洪涝和干旱影响的做法如何在不同的规模(例如，区域、市政)之间相互作用，并对变化作出反应。项目团队将与决策者合作，学习他们的经验并开发适合他们需求的工具。该项目还将通过有指导的研究经验和新的课程模块，为水文学和水资源系统分析方面的下一代劳动力提供教育和培训机会。该项目将解决三个关键问题：1)水库运行的变化将如何通过部分工程、部分演变的流域系统传播；2)水文或治理系统的哪些特征影响这种传播？3)哪些机构设计选择能够实现适应性管理？虽然开发的基于案例的模型可以在两个具体背景下解决研究问题，但该项目还旨在获得关于对减轻水旱风险至关重要的特征和过程的概括性知识，以及对意外脆弱性的见解。为了建立理论，该项目还将生成一个基于微分方程式的一般水库和流域系统的社会水文模型。这个模型将被用来探索在一系列条件下长期出现的系统层面的模式，这将使我们能够建立关于水文和制度因素的理论，这些因素对于理解水库调度规则变化的影响至关重要。综上所述，这项工作将从四个方面促进对洪水和干旱适应性管理的了解：1)说明水库调度在不同尺度上的抗洪抗旱目标之间的权衡；2)确定水库调度变化通过系统传播的过程；3)量化控制径流变化的益处和局限性；以及4)展示机构设计选择在发现关键变化和促进应对方面的影响。这一新知识将解决规划更高的水流变化性的实际挑战，同时降低产生意外脆弱性的风险。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

This project addresses two key tensions in flood and drought mitigation: tradeoffs between minimizing flood and drought risk, and tradeoffs in the choice of where in the system to invest in risk mitigation. This project will study these tradeoffs through detailed case studies in distinct hydro-climatic and governance settings: Lake Mendocino, California and Danjiangkou Reservoir in Hubei Province, China. In both cases, water managers are exploring the use of streamflow forecasts to improve reservoir operations for flood control and water supply under changing conditions. This project will collect and analyze data on hydrology, infrastructure and decision making to study the impacts of operational changes and identify strategies that facilitate adaptation. A model will be developed to test how practices to reduce flood and drought impacts interact across scales (e.g., regional, municipal) and respond to change, in different environmental and social settings. The project team will work with decision makers to learn from their experiences and develop tools that fit their needs. The project will also provide education and training opportunities for the next-generation workforce in hydrology and water resources systems analysis through mentored research experiences and new course modules.This project will address three key questions: 1) How will a change in reservoir operations propagate through the partially-engineered, partially-evolving watershed system? 2) What characteristics of the hydrological or governance system affect this propagation? 3) What institutional design choices enable adaptive management? While the case-based models developed can address the research question in two specific contexts, the project also aims to derive generalizable knowledge about the features and processes critical to mitigating flood and drought risk as well as insights into unintended fragilities. To build theory, the project will also generate a differential equation-based socio-hydrological model of a generic reservoir and watershed system. This model will be used to explore the system-level patterns that emerge in the long-run under a range of conditions, which will enable us to build theory on the hydrological and institutional factors critical to understanding the effects of reservoir operating rule changes. In summary, this work will advance knowledge of adaptive flood and drought management in four ways: 1) illustrate the tradeoffs between flood and drought mitigation goals in reservoir operations across scales; 2) identify the processes through which reservoir operation changes propagate through the system; 3) quantify the benefits and limitations of controlling streamflow variability; and 4) demonstrate the impact of institutional design choices in detecting critical changes and facilitating response. This new knowledge will address the practical challenge of planning for higher streamflow variability, while mitigating the risk of generating unintended fragilities.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.