清漳河流域20230730洪水调查分析

Flood Investigation and Analysis of Qingzhang River Basin on July 30,2023

2023年7月28日至8月1日,山西省晋中市东部山区经历了一场极端天气过程,清漳河流域普降暴雨,涉及和顺和左权2县7个乡(镇)。较大降水区域位于清漳东源中下游干支流,其中松烟河上游为暴雨中心。经统计,区域内部分站点降水量已突破历史极值,最大降水发生在新庄雨量站,6 h、24 h、72 h最大降雨量分别为211.8 mm、478.4 mm、608.2 mm,均为历史极值。由于降水强度大、覆盖面积广,流域内部分河流水位暴涨,山洪暴发,给当地造成严重破坏。对清漳河流域的雨洪灾害成因以及时空分布特点进行深入分析,并提出相应的防范应对措施。

From July 28 to August 1,2023,the eastern mountainous area of Jinzhong City,Shanxi Province experienced an extreme weather process,with heavy rainfall in the Qingzhang River Basin,involving 7 townships(towns)in 2 counties of Heshun and Zuoquan.The larger precipitation area was located in the trunk and tributaries in the middle and lower reaches of the east source of Qingzhang River,where the upper reaches of the Songyan River is the center of the rainstorm.According to statistics,the precipitation at some stations in the region has exceeded historical extremes,with the maximum precipitation occurring at Xinzhuang Rainfall Station.The maximum rainfall in 6 h,24 h,and 72 h was 211.8 mm,478.4 mm,and 608.2 mm,respectively,all of which were historical extremes.Due to the high intensity of precipitation and wide coverage,the water level of some rivers in the basin surged and flash floods occurred,causing serious damage to the local area.The causes of rain and flood disasters in Qingzhang River Basin were deeply analyzed as well as the characteristics of spatial and temporal distribution,and corresponding preventive and coping measures were put forward.