Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Alterations in the Hydrologic Cycle Induced by Urbanization in Northern New Castle County, Delaware: Magnitudes and Projections.
Author Albrecht., James C. ;
CORP Author Delaware Univ., Newark.
Year Published 1974
Report Number DI-14-31-0001-3508 ;DI-14-31-0001-3808; OWRR-A-017-DEL; W74-07729 ; OWRR-A-017-DEL(2)
Stock Number PB-232 153
Additional Subjects Hydrologic cycle ; Delaware ; Surface water runoff ; Urban areas ; Mathematical models ; Ground water ; Evapotranspiration ; Heat transfer ; Soil water ; Watersheds ; Surface waters ; Land use ; Shellpot Creek ; New Castle County(Delaware) ; Wilmington Delaware ; Storm water runoff
Library Call Number Additional Info Location Last
NTIS  PB-232 153 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 26p
A model of surface runoff as a function of land surface characteristics in an urban residential area was developed from measured land surface characteristics, precipitation, and runoff data. Surface runoff from impervious surfaces feeding directly into drainage ways began after an initial extraction for wetting the surface of .03 inches (.08 inches after hot, sunny summer weather). The model was used to evaluate the effects of urbanization on other components of the hydrologic cycle by incorporation into a standard daily water budget run for Shellpot Creek Watershed, Wilmington, DE for 1954 to 1968. The application revealed a tripling of surface runoff, a one-half increase in total runoff, and a halving of both percolate to ground water and actual evapotranspiration as urbanized surface (residential use, 54 percent impervious surface) increased from 20 to 100 percent of the watershed area.