ABSTRACT
The region to which we are applying the residuals management modeling framework is an 11-county area of Pennsylvania, New Jersey, and Delaware which is referred to as the Lower Delaware Valley (see Figure 1). This region consists of Bucks, Montgomery, Chester, Delaware, and Philadelphia Counties in Pennsylvania; Mercer, Burlington, Camden, Gloucester, and Salem Counties in New Jersey; and New Castle County in Delaware. Included in these 11 counties are 379 incorporated political jurisdictions–cities, towns, townships, boroughs, and divisions: 239 in Pennsylvania, 129 in New Jersey, and 11 in Delaware [20–22]. The major cities in the area are Philadelphia (coterminous with Philadelphia County) in Pennsylvania with a 1970 population of 1,948,609; Trenton, population 104,786 within the city bounds, and Camden, city population 102,551, in New Jersey; and Wilmington in Delaware with a 1970 population of 80,386 within the city limits [23–25]. The 11-county region comprises an area of roughly 4,700 square miles (12,200 square kilometers), less than half the size of Belgium or about the size of the State of Connecticut [26–29]. The region is about 80 miles (130 kilometers) across from West to East and roughly 90 miles (145 kilometers) from South to North. The rivers of interest in this region are: the reach of the Schuylkill from Pottstown, Pennsylvania, to the confluence with the Delaware at Philadelphia; the Delaware Estuary which runs approximately 85 miles from the head of tide at Trenton, New Jersey, to the head of Delaware Bay; a short reach of the Delaware River above Trenton; and roughly 30 tributaries of the Delaware and the Schuylkill within this part of the Delaware River Basin [30]. Lower Delaware Valley Region. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315666150/ad0b720d-d0d5-45df-97a6-6345f963d131/content/fig1_B.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
