Laserfiche WebLink
<br />downstream flooding was reduced considerably by the disasterous flood <br /> <br /> <br />storage in the city of Wilkes-Barre. <br /> <br /> <br />The Agnes study included flood frequency, rainfall-runoff, reservoir <br /> <br /> <br />system operation, and water surface profile analyses in the Susquehanna, <br /> <br /> <br />Schuylkill, Potomac and James River Basins. The Corps of Engineers con- <br /> <br /> <br />tracted with Anderson Nichols, Inc., a Boston-baaed consulting engineering <br /> <br />firm, to perform the water surface profile analyses in the Susquehanna <br /> <br />River Basin. The water surface profile studies were used to verify existing <br /> <br />Muskingum flood routing criteria or to replace it with storage-outflow <br /> <br />relationships where the linear Muskingum method was not adequate. <br /> <br />STUDY OBJECTIVES AND MODELS USED <br /> <br />There were two major objectives in the Agnes Study: investigate the <br /> <br /> <br />effect of this large event on previously computed flood frequency rela- <br /> <br /> <br />tionships; and develop mathematical models of rainfall-runoff and reservoir <br /> <br /> <br />operation. Results of the Susquehanna and Schuylkill River studies have <br /> <br /> <br />been reported in "Hydrologic Study - Tropical Storm Agnes, Report No.2" <br /> <br />(reference 1). The mathematical models are to be used to assist in <br /> <br /> <br />studying new flood control projects and to compute regulated and natural <br /> <br /> <br />frequency curves. Two generalized co~puter progrsms developed by The <br /> <br /> <br />Hydrologic Engineering Center were used: HEC-l. Flood Hydrograph Package <br /> <br />(reference 2), and HEC-5, Reservoir System Operation for Flood Control <br /> <br /> <br />(reference 3). A third computer program of The Hydrologic Engineering <br /> <br /> <br />Center, HEC-2. Water Surface Profiles (reference 4). was used by the <br /> <br />consulting engineering firm for their part of the project. <br /> <br />RAINFALL-RUNOFF <br /> <br />Basin data for the HEC-l rainfall-runoff and HEC-5 reservoir operation <br /> <br />models were obtained from the National Weather Service, U.S. Geological <br /> <br /> <br />Survey, and the Baltimore District of the Corps of Engineers. The ~ational <br /> <br />2 <br />