Drought Experiences of Ohio and Their Applications in the DAR-JAI River Basin of Taiwan

by Tiao J. Chang,
Wen C. Huang,
Chian M. Wu,

Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water


The shortage of water due to droughts could cause tremendous environmental and economical impacts to the affected area such as the unsuitability for aquatic life and the inadequacy for municipal and industrial water supply. Based on the method of truncation, the conditional drought probability was developed to evaluate potential drought occurrences in the Scioto River basin of Ohio and the Dar-Jai river basin of Taiwan. Occurrences of droughts in Taiwan, similar to those in the Ohio River Basin, are mainly due to uneven distributions of time and location. Experiences of drought study in Ohio were applied to the Dar-Jai river basin in central Taiwan. Time series of monthly precipitation were used to derive droughts based on truncation levels of 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 gaging stations from the Scioto River basin and twenty-six stations from the Dar-Jai river basin were selected for this comparative study. The kriging method based on the minimum unbiased estimation was used to obtain regional distributions of conditional probability at each drought severity level. Comparison of research results were made with regards to respective methods used for both drainage basins.

Subject Headings: Droughts | Rivers and streams | Basins | Water shortage | Water supply | Precipitation | Municipal water | Taiwan | Asia | Ohio | United States | Ohio River

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