摘要
为改善针对易涝点范围建模时缺乏集水区间概念的现象,采用DEM和传统的D8法确定流向和洼地填平,并将易涝点所在洼地视为"真洼地"不参与循环填平计算。选择青岛市胶南区5 m分辨率的DEM对该方法进行检验,结果表明,该方法能准确地识别出社会调查到的18个易涝点中的15个,命中率83%。对18个易涝点对应的集水特征进行提取,并据其对各个易涝点的易积水程度、危险等级进行分析,结果表明,喜鹊山路11号积水点积水深,威胁最大,在所有积水点中潜在危害最高。
In order to deal the problem that many scholars lack the concept of catchment interval when modeling the waterlogging point,the method that can extract catchment characteristics of waterlogged points in the gentle rolling area of city has been established based on DEM and traditional D8 method to determine the flow direction and the filling of depressions.The depression,where the waterlogged points are located,was regarded as a"true depression",which was not involved in the calculation of cycle filling.The DEM data of 5 m resolution for the Jiaonan District of Qingdao City was tested by the above method and 15 of the 18 waterlogging points were accurately identified,where the hit rate was 83%.In addition,the corresponding catchment characteristics were also extracted,and the water accumulation degree as well as the risk grade of each waterlogged point was analyzed by using the method.The No.11 waterlogged point at Xiqueshan road is the most dangerous and potentially harmful.This method can better extract the catchment characteristics of waterlogging points in the urban area,exhibiting a reference value for the city's flood control and disaster mitigation.
作者
王加虎
梁菊平
李丽
查治荣
刘玉冰
WANG Jiahu;LIANG Juping;LI Li;CHA Zhirong;LIU Yubing(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Huangdao branch of Qingdao Hydrology Bureau,Qingdao 266400,China)
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第5期390-394,共5页
Journal of Hohai University(Natural Sciences)
关键词
城市易涝点
集水区间
DEM
D8法
集水特征提取
青岛市胶南区
urban flood point
catchment interval
DEM
D8 method
deriving of catchment characteristics
Jiaonan District of Qingdao City
