U.S. GEOLOGICAL SURVEY
Water-Resources
Investigations Report 00-4022
Development of a Contour Map Showing Generalized Skew Coefficients
of Annual Peak Discharges of Rural, Unregulated Streams in New York, Excluding
Long Island
By Richard Lumia and Yvonne H. Baevsky
Abstract
Introduction
Purpose and Scope
Acknowledgments
Station skew coefficients
Generalized skew coefficients
Weighting of skew coefficients
Mapping of skew coefficients
Regionalization
Error Analysis
Summary
References cited
FIGURES
1-2. Maps of New York, excluding Long Island, showing:
1. Generalized skew coefficients
2. Five hydrologic regions
3-6. Graphs showing:
3. Unbiased skew coefficients at stations within five hydrologic regions of New York and in all regions
combined
4. Mean generalized skew coefficients for five hydrologic regions of New York and for the five regions
combined, as calculated by five methods
5. Mean square errors of generalized skew coefficients for five hydrologic regions of New York and for
the five regions combined, as calculated by four methods
6. Observed station skew coefficients and skew coefficients predicted from:
A. The IACWD nationwide map (1982)
B. New York statewide map
TABLES
1. Selected statistics for unbiased skew coefficients for each of five hydrologic regions of New York and for
all five regions combined
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