Regionalization of Precipitation Droughts in the Scioto River Basin

by Tiao J. Chang, Ohio Univ, Athens, United States,
S. H. Joo, Ohio Univ, Athens, United States,
C. B. Teoh, Ohio Univ, Athens, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


By the use of monthly precipitation, droughts are defined based on different truncation levels, namely, 70%, 80%, 90%, and 95%, where a 70% truncation level means that 70% of the recorded monthly precipitations are greater than or equal to the value. Twenty one precipitation gage stations were selected in the basin for the study of regionalization. The kriging method based on the minimum unbiased estimation was used to obtain a regional distribution of each truncated monthly precipitation. Contour lines for each truncation level were constructed to show possible drought distributions in the region. The estimation errors associated with each contour map were reasonably small.

Subject Headings: Precipitation | Droughts | Rivers and streams | Basins | Kriging | Errors (statistics) | Water resources | Hydrologic data

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