title: Estimation of sediments in urban drainage areas and relation analysis between sediments and inundation risk using GIS.
abstract: Sediments entering the sewer in urban areas reduce the conveyance in sewer pipes, which increases inundation risk. To estimate sediment yields, individual landuse areas in each sub-basin should be obtained. However, because of the complex nature of an urban area, this is almost impossible to obtain manually. Thus, a methodology to obtain individual landuse areas for each sub-basin has been suggested for estimating sediment yields. Using GIS, an urban area is divided into sub-basins with respect to the sewer layout, with the area of individual landuse estimated for each sub-basin. The sediment yield per unit area for each sub-basin is then calculated. The suggested method was applied to the GunJa basin in Seoul. For a relation analysis between sediments and inundation risk, sub-basins were ordered by the sediment yields per unit area and compared with historical inundation areas. From this analysis, sub-basins with higher order were found to match the historical inundation areas.
authors.affiliation: Department of Civil Engineering, Hanseo University, Seosan, Choongnam, Korea. mjpark@hanseo.ac.kr
authors.forename: Park
authors.initials: P
authors.lastname: Moojong
authors.forename: Jun
authors.initials: J
authors.lastname: Hwandon
authors.forename: Shin
authors.initials: S
authors.lastname: Minchul
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D040362:Geographic Information Systems; D019015:Geologic Sediments / Q000032:analysis*; D008962:Models, Theoretical; D018570:Risk Assessment; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D014873:Water Pollutants