Showing papers on "Siltation published in 1979"

Fundy Tidal Power Environmental Sedimentology

Abstract: Tidal power potentially can contribute significantly to North America's future needs Proposed developments in the upper reaches of the Bay of Fundy have a total generating capacity half again that of Niagara Falls Construction of tidal power barrages could, however, have serious consequences to the marine environment The high productivity of the intertidal communities in the upper reaches is maintained in part by tidal flushing; these communities are also affected by changes in sediment type The upper reaches are important feeding areas for migratory shorebirds and commercial species of fish, and may function as a nursery estuary, supporting offshore fisheries Serious siltation problems could also shorten the lifespan of tidal power barrages It is questionable whether studies now underway to assess the consequences of development can gather the necessary data within the allotted time frame Computer simulation of sediment dynamics combined with programs designed to assess the effect of siltation on benthic communities will, probably within a year, allow estimates of expected productivity losses to be made for some of the areas which have already been studied

Managing Storm Runoff in Chicago Area

Abstract: Existing combined sewers in the Chicago area discharge a mixture of storm-water runoff and sewage to the rivers approx 100 times/yr and on occasions overload the river system making it necessary to reverse the flow of the river system into Lake Michigan. Storm-water and drainage in the combined sewer area will be managed by a system of tunnels and reservoirs under construction. In the separate sewered area, a system of reservoirs, channel improvements, and land treatment is being implemented; and, to reduce the erosion and siltation problems of the rivers and streams, on-site detention in new residential and industrial developments is being required. Thus, the goals of Chicago’s Areawide Wastewater Management Program are comprehensive, including simultaneous flood control and water quality improvements.