Newell, Charles J., Hanadi S. Rifai, and Phillip B. BedientJensen, Richard W. Russell W. Kiesling, and Frank S. ShipleyProceedings: The Second State of the Bay Symposium. February 4 - 6, 19932010-02-152010-02-151993http://hdl.handle.net/1969.3/24112pgs. 65-70Although non-point source (NPS) pollutants have been identified as a key process affecting the water quality of Galveston Bay, only rough estimates of the location and magnitude of nonpoint sources to the Bay had been developed prior to 1990. The characterize existing NPS loadings to the Bay more accurately, the Galveston Bay National Estuary Program (GBNEP) initiated a detailed water quality and NPS mapping project of the lower 4,238 square mile Galveston Bay watershed in November, 1990.nonpoint source pollutionwater qualitywatershedshydrologymappingChapter