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Developmental Strategies for a server based hydrologic model and runoff forecasting system for Kentucky, USA

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2007 ASAE Annual Meeting  072173.(doi:10.13031/2013.23417)
Authors:   Bakkiyalakshmi Palanisamy, Stephen R Workman
Keywords:   Time Constants, Observed Hydrographs, Runoff, Forecasting, Harmonic Analysis,

Abstract Runoff forecasting for ungauged river network requires efficient descriptions of catchment response to the applied input. Developmental strategies of this watershed response function, which is defined as time constant in this paper, from observed hydrographs of Kentucky River basin were discussed. Techniques of analyzing observed hydrographs were presented to include both quick flow and baseflow components. Nonlinear baseflow recession and separation analyses were proposed to characterize karstic nature of the Kentucky River basin. Harmonic analysis of observed hydrographs was setup for the calculation of time constant. The time constants were then suggested to be regressed with geomorphologic properties of the watershed. Channel properties that were considered include length, slope, sinuosity, bed materials, and watershed properties such as soil, landuse characteristics. In addition to channel and watershed characteristics, response of the catchment was proposed to incorporate climatic variables such as precipitation, temperature, Evapotranspiration. As a preliminary attempt, channel length, slope, and sinuosity were obtained for Kentucky River using Utility Network Analyst of ArcGIS software.

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