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CALIBRATION OF SNYDER COEFFICIENTS FOR PENNSYLVANIA 1
Author(s) -
Miller Arthur C.,
Kerr Sonja N.,
Spaeder Donald J.
Publication year - 1983
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1983.tb02780.x
Subject(s) - hydrograph , surface runoff , calibration , hydrology (agriculture) , runoff model , storm , environmental science , flow (mathematics) , mathematics , statistics , meteorology , geology , geography , geotechnical engineering , geometry , ecology , biology
Unit hydrograph theory is one of the most widely used techniques to predict surface runoff. The present study is concerned with the Snyder unit hydrograph and the calibration of the Snyder coefficients for Pennsylvania. Twenty‐seven study basins were selected, located randomly across the state. With the rainfall and runoff recorded for several events for each basin (more than 500 events were analyzed) unit hydrographs were calculated and the Snyder coefficients determined. A map of the coefficients was drawn to illustrate the variability in the coefficients and two equations using multiple regression theory were developed. The unexplained variability of the coefficients suggests that upper and lower bounds on the peak flow might be placed on storm hydrographs developed for ungaged watersheds.