Regional flow duration curves for ungauged sites in Sicily

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Abstract

Flow duration curves are simple and power-ful tools to deal with many hydrological and environmental problems related to water quality assessment, water-use as-sessment and water allocation. Unfortunately the scarcity of streamflow data enables the use of these instruments only for gauged basins. A regional model is developed here for es-timating flow duration curves at ungauged basins in Sicily, Italy. Due to the complex ephemeral behavior of the exam-ined region, this study distinguishes dry periods, when flows are zero, from wet periods using a three parameters power law to describe the frequency distribution of flows. A large dataset of streamflows has been analyzed and the parame-ters of flow duration curves have been derived for about fifty basins. Regional regression equations have been developed to derive flow duration curves starting from morphological basin characteristics.

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Viola, F., Noto, L. V., Cannarozzo, M., & La Loggia, G. (2011). Regional flow duration curves for ungauged sites in Sicily. Hydrology and Earth System Sciences, 15(1), 323–331. https://doi.org/10.5194/hess-15-323-2011

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