论文部分内容阅读
降雨的时空分布是影响坡面水文响应的重要因素之一。本文结合实测物理模型实验数据与基于物理概念的数值模型Intergrated Hydrology Model(InHM)研究降雨的时空分布对坡面产流的影响。利用收集到的实测物理模型数据对数值模拟结果进行参数率定、验证后,再分别对均匀与非均匀分布降雨条件下的坡面产流情况进行数值模拟,通过分析两者间的模拟结果的差异,可以定量化地研究降雨时空分布对坡面产流所产生的影响。研究结果表明:均匀空间分布与不均匀空间分布降雨引起的坡面产流存在相当大的差别,由降雨空间分布的不均匀性带来的产流峰值的变化差距可以超过40%;也验证了在降雨移动产生的时间变化下,产流峰值随着移动方向与坡面方向间角度的增大而逐渐减小。
Spatiotemporal distribution of rainfall is one of the important factors affecting the hydrological response of slope. In this paper, the experimental data of the physical model and the Intergrated Hydrology Model (InHM) based on the concept of physics are used to study the effect of spatio-temporal distribution of rainfall on runoff generation. Using the measured physical model data collected, the numerical simulation results are calibrated and validated. Then, the runoff of the slope is numerically simulated under the condition of uniform and non-uniform rainfall distribution. By analyzing the simulation results between the two Difference, we can quantitatively study the impact of spatio-temporal distribution of rainfall on runoff generation. The results show that there is a considerable difference between uniform spatial distribution and runoff caused by uneven spatial distribution of rainfall, and the difference of the peak of runoff caused by the nonuniform distribution of rainfall can vary by more than 40% Under the change of rainfall time, the peak of runoff decreases with the increase of the angle between the direction of movement and the direction of slope.