摘要
针对丘陵地区的面雨量计算提出了一种新的方法,利用该方法对广西主要江河流域的面雨量进行计算和合成分析,并研究了流域的面雨量与洪水水位的关系。流域的面雨量与洪水水位关系非常密切,连续性的强面雨量往往对应流域的重大洪涝灾害;面雨量峰值出现时间与洪峰的出现时间之间存在着一定的滞后关系,一般是小流域滞后的时间短,而大流域滞后的时间长。对于大流域来说,滞后的时间长短还与流域致洪暴雨的落区有关。
A new method to calculate the area rainfall on hilly land is developed, with which the area rainfall over the main river valleys in Guangxi are derived. On the basis of synthetic analysis, the relationship between area rainfall and flood is studied. The result shows that severe floods are caused by heavy area rainfall. The lag time of the flood peak behind the peak of heavy area rainfall is shorter in small river basins than that in large basins. In addition, lag time in large river basin varies with the distribution of the areas where torrential rain occurrs.
出处
《热带地理》
2003年第3期222-225,245,共5页
Tropical Geography
基金
国家科技部社会公益研究专项资金项目(37020)
广西自然科学基金(桂科基0236041)
广西区气象局重点研究项目<广西主要江河流域面雨量预报系统研究>
