Maps of runoff in the northeastern region and the southern Blue Ridge Province of the United States during selected periods
in 1983-85
Dataset Identification:
Resource Abstract:
Maps of annual runoff for two regions in the eastern United States were prepared by the U.S. Geological Survey for the Direct/Delayed
Response Project being conducted by the U.S. EPA. These maps show annual runoff during water year 1984 in the northeastern
region and in the Southern Blue Ridge Province. Runoff from the northeastern region during the 1984 water yr ranged from 12
to 55 in.; this was 25 to 55% > average runoff for the 1951-80 period. Runoff from the Southern Blue Ridge Province during
the 1984 water year ranged from 14 to 60 in.; this was 10 to 30% > the average runoff for the 1951-80 period. A split sample
analysis of the data for New York was conducted to evaluate the accuracy of the runoff mapping procedure used in this report.
A runoff map was prepared using one-half of the data base. The map was then used to estimate runoff at the gaging stations
that were not used to develop the map. The values estimated from the split-sample map were found to differ from the actual
recorded values by 9.9%. The runoff maps are most accurate in areas with a relatively large concentration of gaging stations
and little topographic variability. Conversely, the maps are least accurate in areas with few gaging stations and high topographic
variability. Based on these criteria, those parts of the maps covering Connecticut, Massachusetts, New Jersey, and Rhode Island,
are the most reliable. The least reliable parts of the maps are those along the North Carolina-Tennessee border and in parts
of Maine. (Author 's abstract)
Citation
Title Maps of runoff in the northeastern region and the southern Blue Ridge Province of the United States during selected periods
in 1983-85