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http://dx.doi.org/10.4491/KSEE.2011.33.6.439

Runoff Analysis for Weak Rainfall Event in Urban Area Using High-ResolutionSatellite Imagery  

Kim, Jin-Young (Department of Urban Engineering, The University of Tokyo)
An, Kyoung-Jin (Department of Urban Engineering, The University of Tokyo)
Publication Information
Journal of Korean Society of Environmental Engineers / v.33, no.6, 2011 , pp. 439-446 More about this Journal
Abstract
In this research, enhanced land-cover classification methods using high-resolution satellite image (HRSI) and GIS in terms of practicality and accuracy was proposed. It aims for understanding non-point pollutant origin/loading, assessment the efficiency of rainfall storage/infiltration facilities and sounds water-environment management. The result of applying enhanced land-cover classification methods to the urban region verifies that roof and road area are including various vegetations such as roof garden, flower bed in the median strip and street tree. This accounts for 3% of total study area, and more importantly it was counted as impervious area by GIS alone or conventional indoor work. The feasibility of the method was assessed by applying to rainfall-runoff analysis for three weak rainfall in the range of 7.1-10.5 mm events in 2000, Chiba, Japan. A good agreement between simulated and observed runoff hydrograph was obtained. In comparison, the hydrograph simulated with land-use parameters by the detailed land-use information of 10m grid had an error between 31%~71%, while enhanced method showed 4% to 29%, and showed the improvement particularly for reproducing observed peak and recession flow rate of hydrograph in weak rainfall condition.
Keywords
Urban Area; High-Resolution Satellite Imagery; Landuse Classification; Weak Rainfall;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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