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http://dx.doi.org/10.17663/JWR.2014.16.1.103

Evaluation of Raingauge Network using Area Average Rainfall Estimation and the Estimation Error  

Lee, Ji Ho (Department of Civil Engineering, Seoul Nation University of Science and Technology)
Jun, Hwan Don (Department of Civil Engineering, Seoul Nation University of Science and Technology)
Publication Information
Journal of Wetlands Research / v.16, no.1, 2014 , pp. 103-112 More about this Journal
Abstract
Area average rainfall estimation is important to determine the exact amount of the available water resources and the essential input data for rainfall-runoff analysis. Like that, the necessary criterion for accurate area average rainfall estimate is the uniform spatial distribution of raingauge network. In this study, we suggest the spatial distribution evaluation methodology of raingauge network to estimate better area average rainfall and after the suggested method is applied to Han River and Geum River basin. The spatial distribution of rainfall network can be quantified by the nearest neighbor index. In order to evaluate the effects of the spatial distribution of rainfall network by each basin, area average rainfall was estimated by arithmetic mean method, the Thiessen's weighting method and estimation theory for 2013's rainfall event, and evaluated the involved errors by each cases. As a result, it can be found that the estimation error at the best basin of spatial distribution was lower than the worst basin of spatial distribution.
Keywords
Area average rainfall; Estimation error analysis; Nearest neighbor index; Raingauge network; Spatial distribution;
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Times Cited By KSCI : 2  (Citation Analysis)
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