摘要
采用25 m分辨率的DEM并收集多年洪水位、潮位数据,以保证源数据的精度和可靠性.结合研究区地貌特征和水系分布,基于ArcGIS的空间分析工具采用种子蔓延法进行了有源淹没分析计算,得到淹没区范围和水深分布图.结果表明:淹没区主要分布在水库和河流下游的冲洪积平原和海积平原,淹没面积共318.08 km^(2),占全区陆域面积的18.6%.洪水淹没深度为0~7.6 m.以水库为种子点的淹没区域较大,淹没水深自种子点到海岸线逐渐增大;以河流为种子点的淹没区域呈带状分布,淹没水深自河流中线向两侧逐渐减小.
The study adopts the digital elevation model(DEM)with 25 m resolution,and collects multiyear flood and tide level data to ensure the accuracy and reliability of source data.Combined with the geomorphic features and water system distribution in the study area,on the basis of ArcGIS spatial analysis technology,the seed spread algorithm is used for calculation of source flood submerge area,which obtains the submerged area and distribution of water depth.The results show that the submerged area is mainly distributed in reservoir,as well as alluvial-diluvial plain and marine plain in lower reaches of river,covering a total area of 318.08 km^(2) and accounting for 18.6%of land area of the whole district.The flood submerged depth is 0-7.6 m,and the submerged area with reservoir as the seed point is large,with the submergence depth gradually increasing from seed point to coastline,while the submerged area with river as the seed point is in zonal distribution,with the submergence depth decreasing gradually from middle line to both sides of river.
作者
张静
倪金
马诗敏
逯兰
ZHANG Jing;NI Jin;MA Shi-min;LU Lan(Shenyang Center of China Geological Survey,Shenyang 110034,China;Liaoning Provincial Building Design and Research Institute Geotechnical Engineering Co.,Ltd.,Shenyang 110166,China)
出处
《地质与资源》
CAS
2021年第5期590-594,共5页
Geology and Resources
基金
中国地质调查局项目“大连海岸带陆海统筹综合地质调查”(DD20189504)
“东北地区自然资源综合调查”(DD20211383)
辽宁省自然资源科技创新项目“大连金普新区地下空间开发地质条件适宜性评价方法研究”.
