Tests were conducted on a 1:36-scale model of a portion of the proposed Beech Fork Lake and multilevel intake structure to determine the effects of the upstream topography and the geometry in the vicinity of the intake structure on the selective withdrawal capability of the structure. A 2500-ft-long by 1800-ft-wide area of the 40-ft-deep lake was modeled, and three alternative locations of the intake structure were investigated. Desnsity stratification caused by differentials in temperature in the prototype was simulated in the model by using saline and fresh water.

Large river systems are valuable national resources that provide numerous benefits to travel, shipping, recreation, and fish and wildlife. However, efforts to expand one of the uses frequently come in direct conflict with one or more of the othersThis guide attempts to bring together all scientific data that are available on techniques that have been or can be used to offset or reduce the impacts of development and maintenance of Upper Mississippi River System or other large river systems. Decision makers are thus provided an objective descriptin of options now at their disposal when they attempt to weigh the merits of defects associated with a particular action.