Basin-Wide Stormwater Management in Pennsylvania—A Case Study of Hydrologic Performance Standardsby T. R. Pysher, Sweetland Engineering &, Associates, Inc, State College, United States,
D. F. Kibler, Sweetland Engineering &, Associates, Inc, State College, United States,
M. N. Mather, Sweetland Engineering &, Associates, Inc, State College, United States,
J. P. Mazich, Sweetland Engineering &, Associates, Inc, State College, United States,
Abstract: Performance standards in the form of 'release rates' are developed using hydrologic computer models. This basin-wide approach to stormwater management considers the impact of increased runoff on downstream areas; therefore, it is more comprehensive than conventional on-site stormwater management that maintains post-development peak discharges at pre-development levels. This paper reviews the release rate concept and provides a comparison of the downstream effects of basin-wide and conventional on-site stormwater management. A case study of the Little Plum Run watershed in Clinton County, PA provides a practical application of release rates. This paper also presents a sensitivity analysis of the effect of various hydrologic computer model input parameters on release rates for the Little Plum Run watershed.
Subject Headings: Stormwater management | Case studies | Hydrologic models | Basins | Computer models | Watersheds | Sensitivity analysis | Rivers and streams | Runoff | Pennsylvania | North America | United States
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