Science. 1978 Jul 21;201(4352):229-34. doi: 10.1126/science.201.4352.229.
Development and implementation of local and regional plans to control nonpoint sources of pollution from agricultural land are major mandates of section 208 of Public Law 92-500. Many planners tend to equate erosion control as measured by the universal soil loss equation with improvements in water quality. Others implement channel management practices which degrade rather than improve water quality and thereby decrease the effectiveness of other efforts to control nonpoint sources. Planners rarely recognize the importance of the land-water interface in regulating water quality in agricultural watersheds. More effective planning can result from the development of "best management systems" which incorporate theory from all relevant disciplines.
制定和实施针对农业土地非点源污染的地方和区域计划，是公法 92-500 第 208 条的主要任务。许多规划人员倾向于将通过通用土壤流失方程衡量的侵蚀控制等同于水质改善。其他规划人员则采用渠道管理实践，这些实践会降低而不是提高水质，从而降低了控制非点源的其他努力的有效性。规划人员很少认识到土地-水界面在调节农业流域水质方面的重要性。通过制定“最佳管理系统”可以更有效地进行规划，该系统整合了所有相关学科的理论。
