摘要: The overall objective of the recreation lockage study was to document the present level of usage and develop a model and forecasts for general recreation use and, in particular, recreation boat lockage. Specific tasks in this stud... 展开 The overall objective of the recreation lockage study was to document the present level of usage and develop a model and forecasts for general recreation use and, in particular, recreation boat lockage. Specific tasks in this study were to: (1) Develop a methodology to forecast use and small craft lockages on the Upper Mississippi River; (2) Forecast use and small craft lockages for 1980, 1985, 1990, 1995, and 2000. The study area extended from the Twin Cities in Minnesota to just north of the confluence of the Missouri River with the Mississippi north of St. Louis, Missouri. This section of the river contains 28 lock and dam operations and a variety of land and water resources. 收起