Estimation of Probable Maximum Precipitation for Dams in the Hongru River Catchment, China
Estimation of Probable Maximum Precipitation for Dams in the Hongru River Catchment, China
复制标题
DOI：
10.1007/s007040050014
复制
发表时间：
1998-02
影响因子：
3.4
通讯作者：
C. Svensson;P. Rakhecha
中科院分区：
文献类型：
--
作者：
C. Svensson;P. Rakhecha
在夏季，台风在北太平洋西部形成，并向西向中国移动。有些气旋在离开海岸后向北转向，而另一些则继续在陆地上空移动。这些台风给中国中东部的淮河流域带来了强降雨。1975年8月，台风尼娜的残余在淮河上游山区的鸿儒河流域造成了异常强的降雨。8月4日至8日，降雨持续了5天。这种类型的近静止台风可以造成大强度的降雨持续时间长，并适合最大化，以获得可能的最大降水（PMP）的估计。PMP转换成一个可能的最大洪水过程线，随后用于设计溢洪道等。在这项研究中，PMP值已估计使用水文气象方法，涉及深度-面积-持续时间分析，水分最大化，高度调整台风尼娜，为1，2，和3天的持续时间。获得了整个鸿儒河流域以及板桥（762 km 2）、石漫滩（230 km 2）、博山（580 km 2）和苏亚湖（4 498 km 2）大坝上游子流域的区域PMP值。在100 m左右的点上，PMP分别为1 200 mm/d、1 460 mm/2 d和1 910 mm/3 d，与前人的研究结果吻合较好。
During the summer season, typhoons form in the western north Pacific Ocean and travel westward towards China. Some recurve northward off the coast, whereas others continue in over land. These typhoons bring heavy rainfall to the Huai river basin in eastern central China. In August 1975, the remnant of typhoon Nina caused exceptionally heavy rainfall in the Hongru river basin, in the mountainous upper reaches of the Huai river. The rainfall lasted five days from 4 to 8 August. This type of nearly stationary typhoon can cause rainfall of large intensity for a long duration, and is suitable for maximization to derive probable maximum precipitation (PMP) estimates. The PMP is transformed into a probable maximum flood hydrograph that is subsequently used to design spillways etc. In this study the PMP values have been estimated using a hydrometeorological method involving depth-area-duration analysis, moisture maximization, and altitude adjustment for typhoon Nina, for 1, 2, and 3 days duration. Areal PMP values were obtained for the entire Hongru river catchment, as well as for the subcatchments upstream the dams at Banqiao (762 km2), Shimantan (230 km2), Boshan (580 km2), and Suyahu (4 498 km2). For point values, the PMP was estimated to 1 200 mm/day, 1 460 mm/2 days, and 1 910 mm/3 days at altitudes about 100 m, which agrees well with previous studies.