Weir Design to Maintain Effluent Quality from Dredged Material Containment Areas

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dc.acquisition-srcen_US
dc.call-noTC 187 .D73 TR-D-78-18, 1978en_US
dc.contract-noen_US
dc.contributor.authorWalski, Thomas M. and Paul R. Schroederen_US
dc.contributor.otherU.S. Army Corps of Engineers Dredged Material Research Programen_US
dc.date.accessioned2010-02-15T17:15:57Z
dc.date.available2010-02-15T17:15:57Z
dc.date.issued1978en_US
dc.degreeen_US
dc.description106 pgs.en_US
dc.description-otheren_US
dc.description.abstractThe suspended solids concentration in the effluent water from an upland containment area being filled with fine-grained material can be significantly influenced by the length of the weir and the depth of the ponded water. This study develops a procedure for designing and operating the weir to maintain good effluent quality, given a flow and dredged material type. Stratified-flow and sediment transport models were investigated to describe the depth of withdrawal, velocity profile, and effluent suspended solids concentration, given a concentration profile and flow. Field data on these parameters were collected at three sites - Yazoo River, MS, Fowl River, AL, and Oyster Bay, AL. The Waterways Experiment Station's selective withdrawal model developed by Bohan and Grace, modified to fit observed data, was selected as the basis of the design procedure for silt and saltwater clays and for freshwater clays. The nomogram relates the flow, weir length, ponding depth, and effluent suspended solids concentration. The designer manipulates these four variables until he reaches a satisfactory balance between weir length and ponding depth, based on his design flow and effluent goal. Sharp-crested rectangular or shaft-type weirs are recommended. Proper operation of the weir can ameliorate the effects of short-circuiting or an undersized basin. In general, the weir crest should be maintained at as high an elevation as feasible during dredging operations. Guidance for operation of the weir for special applications is also presented.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeUnited Statesen_US
dc.history8/27/07 easen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23281
dc.latitudeen_US
dc.locationTAMUG Circulating Collectionen_US
dc.longitudeen_US
dc.notesen_US
dc.placeVicksburg, MSen_US
dc.publisherU.S. Army Corps of Engineers Waterways Experiment Stationen_US
dc.relation.ispartofseries5087.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesU.S. Army Corps of Engineers Technical Report D-78-18en_US
dc.subjectdredgingen_US
dc.subjectenvironmental aspectsen_US
dc.subjectweirsen_US
dc.subjectwaste disposal sitesen_US
dc.titleWeir Design to Maintain Effluent Quality from Dredged Material Containment Areasen_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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