Emphasis on finding the most cost-effective ways to reduce reservoir sedimentation is increasing. Biophysical and economic models for a large agricultural watershed are integrated to estimate the average and marginal costs of reducing sedimentation with an optimal combination of land management...

While there is substantial evidence that nonpoint sources have lower nutrient reduction costs than point sources, experience with water quality trading (WQT) reveals a common theme: little or no trading activity. The success of WQT seems, in part, to depend on the structure of the market created...