FLOOD03246

• County: Statewide
• Community: Nationwide
• Basin: Statewide
• Title: Pollution Characteristics of Stormwater Runoff Completion Report
• Date: 9/1/1978
• Prepared By: CSU Environmental Resources Center
• Floodplain - Doc Type: Educational/Technical/Reference Information

the mechanisms controlling constituent concentrations. The

greater overland flow, higher peak discharge, and shorter

residence time of water in soils in the urban system were

identified as the primary factors contributing to the observed

differences between the watersheds.

The quality and quantity of storm runoff from a regional

shopping mall in Tallahassee was also examined (Turner and Burton,

1975). The mall covered approximately 75 acres (30 hal, with

reported traffic volumes of approximately 8.6 million vehicles

annually. Table 15 summarizes the concentrations of selected

constituents of the runoff from the one storm that was sampled.

Some of the notable features of these data include (1) the very

large variability in concentrations of nearly all the constituents,

(2) the relatively high dissolved solids concentrations, (3) the

high proportions of volatile solids, dissolved organic carbon,

and particulate organic carbon in the runoff, and (4) the high

concentrations of phosphorus in the runoff considering the lack

of a sanitary sewage source. The reasons for the high phosphorus

concentrations were not determined.

A recent study concerning the effects of land use on urban

runoff quality was carried out by Rimer, Reynolds and Nissen

(1976). Their study utilized the Third Fork Creek drainage area

in Durham, N.C., and was part of a 208 study for the Triangle J.

Council of Governments. The study involved the inventory and

analysis of point and non-point pollution (Pollution Source

Analysis). Instead of monitoring the drainage basin as a whole

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