Finding Principles of Large Scale Hydrologic Response: Linking Hydroclimatology and River Basin Dynamics

Kumar 该研究的目的是通过耦合水文气候学和流域动力学，发展不同水文气候制度下的大尺度水文响应原理。 将通过三项任务实现这一目标： 通过对大气-水文循环和径流的联合分析，制定参数化方法，将水文气候学和流域响应特征联系起来。 在这项任务中，我们将：（I）综合利用大气动力学、大气湿度、风速和温度场的分析以及湍流观测，将整个美国划分为均匀的水文气候系统。 这还涉及确定描述这些制度之间的相似性和差异的参数。 (ii)在每一个均质区域中，发展气候特征参数与流域响应之间的关系。 发展一个无量纲的制定大规模流域响应，明确纳入水文气候的影响和自相似性的三维河流网络。 在本研究中，我们将（I）将水文气候影响和三维河网的自相似性纳入水文相似性的概念，并在无量纲框架下建立流域响应公式。 (ii)确定控制两个流域在水文气候均匀区域内和跨水文气候均匀区域响应的相似性和差异的重要参数，并检查其适用性的尺度使用高分辨率数字高程和径流数据，在不同的水文气候区域进行验证研究。在这项任务中，我们将：（i）将上述公式产生的流域响应与不同状况下观测到的径流进行比较。 (ii)通过使用各种大小的盆地研究无量纲配方的适用性尺度（iii）分析所确定的参数的有效性，这些参数表征了均匀制度内的响应之间的相似性和差异。 在本提案执行期间，模型开发和测试将限于两到三个同质区域的盆地。

Kumar The objective of the proposed research is to develop principles of large scale hydrologic response in different hydroclimatological regimes by coupling hydroclimatology and river basin dynamics. This objective will be accomplished via three tasks: Through joint analysis of the atmospheric-hydrologic cycle and streamflow develop parameterizations to link hydroclimatology and basin response characteristics. In this task we will: (I) Classify the entire US into homogeneous hydroclimatic regimes using a combination of atmospheric dynamics, and analysis of atmospheric moisture, wind velocity and temperature fields, and stramflow observations. This also involves identifying parameters that describe the similarities and differences between these regimes. (ii) Develop relationships between parameters characterizing the climatology and the basin response in each homogeneous regime. Develop a non-dimensional formulation of large-scale basin response which explicitly incorporates the hydrolimatological influence and self-similarity of the three dimensional river networks. In this task we will (I) Incorporate hydroclimatological influence and the self-similarity of three dimensional river networks into the notion of hydrologic similarity and develop formulation of basin response in non-dimensional framework. (ii) Identify the important parameters that control the similarities and differences in responses of two basins within and across hydroclimatogically homogeneous regimes, respectively, and examine the scales of their applicability Using high resolution digital elevation and streamflow data, perform validation studies in different hydrolimatic regimes.In this task we will: (i) Compare the basin response generated from the above formulations with the observed streamflows in the different regimes . (ii) Study the scales of applicability of the non-dimensional formulations by using basins of various sizes (iii) Analyze the effectiveness of the identified parameters that characterize the similarities between responses within homogeneous regimes and differences across them. Model development and testing will be limited to basins in two to three homogeneous regimes for the duration of the proposal.