Controlling agricultural nonpoint source pollution from livestock grazing is a necessary step to improving the water quality of the nation's streams. The goal of enhanced stream water quality will most likely result from the implementation of an integrated system of best management practices (BMPs) linked with stream hydraulic and geomorphic characteristics. However, a grazing BMP system is often developed with the concept that BMPs will function independently from interactions among controls, climatic regions, and the multifaceted functions exhibited by streams. This paper examines the peer reviewed literature pertaining to grazing BMPs commonly implemented in the southern humid region of the United States to ascertain effects of BMPs on stream water quality. Results indicate that the most extensive BMP research efforts occurred in the western and midwestern U.S. While numerous studies documented the negative impacts of grazing on stream health, few actually examined the success of BMPs for mitigating these effects. Even fewer studies provided the necessary information to enable the reader to determine the efficacy of a comprehensive systems approach integrating multiple BMPs with pre‐BMP and post‐BMP geomorphic conditions. Perhaps grazing BMP research should begin incorporating geomorphic information about the streams with the goal of achieving sustainable stream water quality.

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MORAN, AMY CHRISTINE. A North Carolina Field Study to Evaluate Greenroof Runoff Quantity, Runoff Quality, and Plant Growth. (Under the direction of Gregory D. Jennings and William F. Hunt) Two greenroofs were constructed for research and demonstration purposes in North Carolina; the first was constructed at the Neuseway Nature Center in Kinston in April 2002 and the second greenroof was constructed at Wayne Community College (WCC) in Goldsboro in May 2002. The 27 m 2 Nature Center Greenroof, with a 3% pitch, was constructed with 102 mm deep media. The relatively flat, 70 m 2 WCC Greenroof was constructed with two different media depths of 102 mm and 51 mm to research the effect of media depth on plant growth. Each greenroof was compared to a reference roof, or a control roof, on site.