Urban Flood Water Management Systems in Semi-Arid Regions: Model Extension, Design and Application: Project Completion Report

• Main Authors: Arai, K., Ince, S., Resnick, S. D.
• Other Authors: University of Arizona
• Language: en_US
• Published: University of Arizona (Tucson, AZ) 1977
• Subjects: Rainfall-runoff model; thunderstorm non-linear reservoir model; urban watershed; Urban runoff > Computer programs.; Runoff > Arizona > Tucson.
• Online Access: http://hdl.handle.net/10150/305440

Project Completion Report, OWRT Project No. A-049-ARIZ / Agreement No. 14-31-0001-4003 / Project Dates: July 1, 1973 - June 30, 1974. / Acknowledgement: The work upon which this report is based was supported by funds provided by the United States Department of the Interior, Office of Water Research and Technology, as authorized under the Water Resources Research Act of 1964. === A non-linear reservoir model is used to represent the rainfall-runoff relationships for thunderstorms on the urban watersheds of Tucson, Arizona. Two types of computer programs are developed: a calibration program to obtain a best -fit calculated hydrograph; and a verification program to generate storm hydrographs given the watershed characteristics and a hyetograph. Calibration reveals the relationship of the model parameters, namely, (f) the inflow coefficient, (a) the constant coefficient, and (TL) the time lag, to the total rainfall, drainage area, channel length, and infiltration capacity of the watershed. The average discrepancy between the predicted hydrograph and the actual hydrograph for Tucson urban watersheds is 20 -25 percent.