WCR: Quantifying the Impact of Land Use and Climate Change on Groundwater/Surfacewater Interactions in Regional Great Lakes Watersheds

0233648 Hyndman土地利用和气候的变化都可能对水循环动态产生不利影响，但这些变化的潜在影响很少在区域流域量化。PI建议使用综合建模方法在重要的尺度上探索复杂的气候-陆地-水相互作用。 他们提出的研究将分别深入了解气候和土地利用变化的影响，然后协同作用，对整个区域五大湖流域水通量的时空变化。这些模型还将提供一个框架，以研究在流域尺度上控制地表水和地下水之间相互作用的复杂过程。高分辨率的河流流量测量和土地利用估计将限制基于过程的流量模型。 将对排入五大湖的两个实验流域的试验模型进行改进，以预测水循环通量的空间和时间动态。 拟议的工作具有很高的智力价值，因为很少有研究：（1）充分处理了气候和土地利用对水动力学的相互作用，（2）充分整合的三维地下水和地表水流动模型，（3）在一个过程模型框架中应用高分辨率的河流流量数据，以估计不同土地覆盖的补给率，（4）建立了实验流域尺度的土地-气候-水文相互作用机理模型。拟议的工作将产生广泛的重大影响。 首先，研究结果将有助于解释气候、土地利用和水循环之间的复杂关系，这些关系通常是在决策的尺度上进行的。 其次，将探讨土地利用和气候变化的情景，为地方、州、地区和联邦机构提供信息。 第三，拟议的教育活动将通过多学科环境使学生广泛了解重要的气候-土地-水的相互作用。 最后，将向社区利益攸关方提供关于其行动如何影响水循环动态的信息。

0233648HyndmanChanges in land use and climate are both likely to adversely affect water cycle dynamics, however the potential impact of these changes are rarely quantified in regional watersheds. The PI's propose to explore complex climate-land-water interactions at scales that matter using an integrated modeling approach. Their proposed research will provide insight into the impacts of climate and land use changes separately, and then synergistically, on the spatial and temporal variation of water fluxes throughout regional Great Lakes watersheds. The models will also provide a framework to study the complex processes that control the interactions between surface water and groundwater at a watershed scale. High-resolution stream flow measurements and land use estimates will constrain process-based flow models. Pilot models of two experimental watersheds that drain into the Great Lakes will be refined to predict spatial and temporal dynamics of the water cycle fluxes. The proposed work has high intellectual merit because few studies have: (1) adequately addressed the interaction of climate and land use on water dynamics, (2) fully integrated three-dimensional groundwater and surface water flow models, (3) applied high-resolution stream flow data in a process model framework to estimate recharge rates for different land covers, and (4) developed mechanistic models of land-climate-hydrology interaction at the experimental watershed scale. The proposed work will have significant broader impacts. First, the results will help explain complex relationships between climate, land use and the water cycle at scales where decisions are commonly made. Second, scenarios of land use and climate change will be explored to provide information to local, state, regional and federal agencies. Third, the proposed education activities will provide students with a broad understanding of important climate-land-water interactions through a multidisciplinary environment. Finally, community stakeholders will be provided with information on how their actions impact water cycle dynamics.