中文摘要：

洪水是全世界发生的最普通的自然危险之一。然而，在一个给定的区域的食物和它的可能的大小的起源的知识还仍然保持不清楚。理解的这缺乏在有在四川省的大度的多山的区域是特别地尖锐的，中国，在流量很少被测量的地方。在一个区域的流速及流水量的性质与时间和降雨数量和分水岭地形学的空间分发有关。geomorphologic 特征是在分水岭的插头把降雨输入转变成输出自记水位计的隧道网络和包围风景。与分水岭的给定的 geomorphologic 性质，没有使用过去的降雨或流量事件的任何记录数据，理论上，水文学反应功能能水力地被决定。在这研究， kinematic-wave-based geomorphologic 即时单位自记水位计(KW-GIUH ) 模型被收养并且验证了在 ungauged 区域估计流量。在四川的二个山分水岭， Yingjing 河分水岭和 Tianquan 河分水岭作为学习地点被选择。二个分水岭的 geomorphologic 因素被基于从美国鈥檚 NASA 的梭雷达地形学使命获得的地志的数据库使用一个数字举起模型(DEM ) 获得。二个分水岭上的模型的测试两个都被执行在计量并且 ungauged 地点。在为在计量地点的很多暴风雨的模仿并且观察的自记水位计之间的比较在这些区域为流量分析作为一个有用工具显示了 KW-GIUH 模型的潜力。而且，那能导致模仿可能的集中的暴风雨在这些区域的严肃的泛滥，合成降雨雨量图作为输入被采用到 KW-GIUH 模型为不同回来时期条件在二个 ungauged 地点获得流动自记水位计。Hydroeconomic 分析能在未来被执行为决定洪水控制工作选择最佳设计回来时期。关键词 Kinematic-wave-based geomorphologic 即时单位自记水位计(KW-GIUH )- Ungauged 分水岭 - 降雨流量模拟 - 数字举起模型

英文摘要：

Floods are one of the most common natural hazards occurring all around the world. However, the knowledge of the origins of a food and its possible magnitude in a given region remains unclear yet. This lack of understanding is particularly acute in mountainous regions with large degrees in Sichuan Province, China, where runoff is seldom measured. The nature of streamflow in a region is related to the time and spatial distribution of rainfall quantity and watershed geomorphology. The geomorphologic characteristics are the channel network and surrounding landscape which transform the rainfall input into an output hydrograph at the outlet of the watershed. With the given geomorphologic properties of the watershed, theoretically the hydrological response function can be determined hydraulically without using any recorded data of past rainfall or runoff events. In this study, a kinematic-wave-based geomorphologic instantaneous unit hydrograph （KW-GIUH） model was adopted and verified to estimate runoff in ungauged areas. Two mountain watersheds, the Yingjing River watershed and Tianquan River watershed in Sichuan were selected as study sites. The geomorphologic factors of the two watersheds were obtained by using a digital elevation model （DEM） based on the topographic database obtained from the Shuttle Radar Topography Mission of US＇s NASA. The tests of the model on the two watersheds were performed both at gauged and ungauged sites. Comparison between the simulated and observed hydrographs for a number of rainstorms at the gauged sites indicated the potential of the KW-GIUH model as a useful tool for runoff analysis in these regions. Moreover, to simulate possible concentrated rainstorms that could result in serious flooding in these areas, synthetic rainfall hyetographs were adopted as input to the KW-GIUH model to obtain the flow hydrographs at two ungauged sites for different return period conditions. Hydroeconomic analysis can be performed in the future to select the optimum design return period for dete