PROTOCOL FOR DEVELOPING FECAL COLIFORM TMDLS IN THE STATE OF NEW JERSEY
Abstract:Quantifying pathogen loads from nonpoint sources of fecal coliforms is distinguished from quantifying other pollutants given the inherent variability in population size and dependence not just on physical factors such as temperature and soil characteristics, but also on less predictable factors such as regrowth media. Since fecal coliform loads and concentrations can vary many orders of magnitude over short distances and over time at a single location, dynamic model calibrations can be very difficult. Options available to control non-point sources of fecal coliform typically include the following measures: goose management strategies, pooper-scooper ordinances, and septic system maintenance; the efficacy of such control measures however, is not easily measured. Given these considerations, detailed water quality modeling may not provide adequate insight or guidance toward the development of implementation plans for fecal coliform reductions. The purpose of this paper is to outline the methodology that will be used in developing TMDLs in the State of New Jersey for fecal coliformimpaired stream segments which occur in non-tidal areas not affected by combined sewer overflows and in which nonpoint sources are known to contribute the primary pollutant load. Percent-load reductions will be assigned to stream segments based on the use of a geometric mean and the aid of a load-duration curve. Bacterial sources will then be identified using one-of-several reliable bacterial source tracking (BST) methods and targeted as part of the TMDL implementation process.
Document Type: Research Article
Publication date: January 1, 2002
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