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PREDICTING STORMFLOW AND PEAKFLOW FROM SMALL BASINS IN HUMID AREAS BY THE R‐INDEX METHOD

PREDICTING STORMFLOW AND PEAKFLOW FROM SMALL BASINS IN HUMID AREAS BY THE R‐INDEX METHOD ABSTRACT: A relatively simple nonlinear equation was fitted to 468 stormflows larger than 0.05 area inches on 11 forested basins from New Hampshire to South Carolina, providing a predictive method for use on forest and wildlands in humid regions. Stormflow in area inches (Q̄) was: where R is the mean value of Q/P for all P larger than one inch, P is storm rainfall in inches, and I is the initial flow rate in ft3/sec/mi2. S.E. was 0.3 inch of stormflow. Peakflow was similarly estimated, S.E. 26 ft3/sec/mi2. The R‐index method is proposed as a practical tool in forest and wildland management. Similar to the SCS runoff curve number method, the R‐index method requires no prior assumptions about infiltration capacities of forest lands, but calls for the mapping of all first‐order streams for the average storage capacity index R, i.e., the mean hydrologic response of the source areas. Tested against the runoff curve method on four independent basins, predictions by the R‐index method were considerably more accurate when field information normally available to planners and managers was used in both methods. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the American Water Resources Association Wiley

PREDICTING STORMFLOW AND PEAKFLOW FROM SMALL BASINS IN HUMID AREAS BY THE R‐INDEX METHOD

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References (19)

Publisher
Wiley
Copyright
Copyright © 1977 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1093-474X
eISSN
1752-1688
DOI
10.1111/j.1752-1688.1977.tb02021.x
Publisher site
See Article on Publisher Site

Abstract

ABSTRACT: A relatively simple nonlinear equation was fitted to 468 stormflows larger than 0.05 area inches on 11 forested basins from New Hampshire to South Carolina, providing a predictive method for use on forest and wildlands in humid regions. Stormflow in area inches (Q̄) was: where R is the mean value of Q/P for all P larger than one inch, P is storm rainfall in inches, and I is the initial flow rate in ft3/sec/mi2. S.E. was 0.3 inch of stormflow. Peakflow was similarly estimated, S.E. 26 ft3/sec/mi2. The R‐index method is proposed as a practical tool in forest and wildland management. Similar to the SCS runoff curve number method, the R‐index method requires no prior assumptions about infiltration capacities of forest lands, but calls for the mapping of all first‐order streams for the average storage capacity index R, i.e., the mean hydrologic response of the source areas. Tested against the runoff curve method on four independent basins, predictions by the R‐index method were considerably more accurate when field information normally available to planners and managers was used in both methods.

Journal

Journal of the American Water Resources AssociationWiley

Published: Apr 1, 1977

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