Types Of Best Management Practices Research Articles

Pollutant loadings generated by nonpoint sources in the Santa Monica Bay Drainage Basin: A case study

The Santa Monica Bay provides a number of beneficial uses. To protect these, best management practices that control urban runoff should be utilized. In order to determine the types of best management practices to be used, an estimation of nonpoint source pollutant loads generated by the Santa Monica Drainage Basin is needed. Local land use, runoff, and chemical data were used to estimate pollutant loads from nonpoint source pollution and pollutant loads by land use in three subbasins of the Santa Monica Drainage Basin: namely, Ballona Creek, Malibu Creek, and Topanga Creek. The time period of available data was May 1988 to May 1990.

A Monitoring/Modeling Strategy for 208 Implementation

ABSTRACT AN increased emphasis on obtaining and preserving our nation's water quality has led to the need for in-novative and accute methods of assessing and treating nonpoint source water quality problems. The Agricul-tural Engineering Department at Purdue University has been working on the problem of quantifying and treating nonpoint source water quality problems, in conjunction with several local, state and national agencies, since 1972. Water quality problems and their solutions cannot be fully described and understood from monitoring studies alone, due to the spatial and temporal nature of the pro-blem. On the other hand, unverified or unvalidated simulation studies are just as questionable. A methodology is presented which uses both monitoring and modeling information to describe and understand the complex processes of nonpoint source hydrology and pollution production. Examples of the use of the ANSWERS watersehd model in both planning and evaluation applications are provided. The planning example examines a primarily agricultural watershed of approximately 1964 ha both before and after application of several different manage-ment schemes. Selection criteria based both on sediment yield reduction and cost/benefit ratios are presented. The evaluation example utilizes the entire Black Creek watershed in northeastern Indiana in showing the im-pacts of incorporating several types of Best Management Practices (BMPs) throughout the watershed from 1975 to 1978. Spatial as well as temporal changes are noted.