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a flow recommendation, fine-tunes the
<br />current New England ABF policy, actually
<br />increasing flow recommendations in some
<br />areas, while reducing them in others. The
<br />method is relatively simple to apply, closely
<br />approximates unregulated August median
<br />flow, is statistically based, and is very re-
<br />liable for optimizing water resources for
<br />both aquatic habitat and man-made devel-
<br />opment.
<br />Future refinements to this method may
<br />be possible through further study of the
<br />various individual interior and coastal
<br />subregions identified in this study. With
<br />more data, it may be possible to further
<br />differentiate individual cfsm values for
<br />each of these regions and develop even
<br />finer hydrologic classes for policy use.
<br />ACKNOWLEDGMENTS
<br />This study was an interdisciplinary effort, and
<br />could not have succeeded without professional in-
<br />put from hydrologists, statisticians, aquatic biol-
<br />ogists, and resource managers. I thank Michael
<br />Schimpff for his useful criticism and sources of
<br />hydrologic and climatic data, and William Bartlett
<br />of the USGS for his review, criticism, and insights
<br />into New England streamflow characteristics. Rob-
<br />ert Scheirer and Gordon Russell of the U.S. Fish
<br />and Wildlife Service provided invaluable insights
<br />into the development of the ABF policy. Tom Shy-
<br />ka relentlessly compiled much of the data from
<br />the USGS basin data files. I am indebted to Charles
<br />F. Ritzi, John Slagle, William Perry, and Peter Wil-
<br />liams for editorial and statistical review, and to
<br />Carol Dutting and Glenda Stewart for patiently
<br />revising the manuscript.
<br />REFERENCES
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<br />methodology. Instream Flow Information Paper No. 12, Washington, DC: U.S. Fish and
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<br />Chow, Ven Te. 1964. Handbook of applied hydrology. New York: McGraw Hill.
<br />Dingman, S. L. 1978. Synthesis of flow duration curves for unregulated streams in New
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