安徽省部分山丘区中小河流水文分析与频率计算

Hydrological Analysis and Frequency Calculation of Small and Medium-sized Rivers in Some Hilly Areas of Anhui Province

通过外业调查洪水宣城市11个乡镇3条河流共11调查点和内业数据分析,安徽省宣城市小河主要存在治理不完善,堤防达标率不高,防洪设施薄弱、标准低;山洪灾害防御能力不足。山区众多山溪性小支流,水土流失、河床淤积严重,且极不稳定等诸多问题,建议推进防洪治理工程,加强防洪安全教育,以提高防洪水平。

Through field investigation and analysis of 11 survey points and internal data from 11 townships and 3 rivers in Xuancheng City,Anhui Province,it was found that the main problems with small rivers in Xuancheng City have such problems as incomplete governance,low embankment compliance rate,weak flood control facilities,low standards and insufficient ability to defend against flash floods.There are numerous small tributaries of mountain streams in mountainous areas,with serious soil erosion,riverbed siltation,and extreme instability.It is suggested to advance the flood control project and strengthen the education of flood control safety so as to improve flood control level.