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A three-dimensional hydraulic and sediment transport model, U2RANS, has been developed through funding provided by Taiwan Water Resources Agency and has been applied to other sediment transport problems. The model was extended to simulate the case where the reservoir pool is nearly full, but dam outlet gates are opened to pressure flush sediments from the vicinity of the gates. We applied the 3D flow model U2RANS to observed pressure flushing cases at Cherry Creek Reservoir in Denver, Colorado. We compared the model results to pre- and post-flush surveys of the reservoir bottom near the outlet intake structure for Cherry Creek Dam and Reservoir, as well as the observed downstream sediment concentrations during the flushing operations.", "catalogStatusId":1, "metadataFilePath":null, "metadataStandard":{ "_id":"ISO", "definition":"International Standards Organization (ISO) 19115-1:2014 metadata content standard, and ISO 19139:2007 metadata implementation standard", "createDate":"2018-11-20T13:25:52+00:00" }, "createDate":"2021-01-25T22:45:16+00:00", "updateDate":"2025-12-10T16:42:14+00:00", "programNames":[ "Science and Technology Program" ], "generationEffort":"S&T Project 1754: Prediction of Reservoir Sediment Pressure Flushing", "generationEffortId":51, "subTheme":{ "_id":25, "subTheme":"Sediment and Sedimentation", "definition":"Relating to the study of sediment accumulation and movement, chemical, physical, biological, and radiological characteristics of sediment, and management of sediment loads.", "createDate":"2019-10-08T15:05:05+00:00" }, "tags":[ "Sediment Transport Modeling", "Reservoir Sedimentation" ], "themes":[ "Environmental" ] }, "type":"CatalogRecord", "relationships":{ "location":{ "data":[ { "id":"/rise/api/location/3679", "type":"Location" } ] }, "catalogItems":{ "data":[ { "id":"/rise/api/catalog-item/10770", "type":"CatalogItem" } ] } } }, { "id":"/rise/api/catalog-item/10770", "attributes":{ "_id":10770, "itemTitle":"S&T Project Number 1754 Final Report: Modeling of Cherry Creek Reservoir Pressure Flush", "itemDescription":"A numerical and empirical modeling study of pressure flushing through outlet works is reported at the Cherry Creek Dam and Reservoir, Denver, Colorado. Specifically, a 3D numerical model and empirical equations from laboratory experiments are developed and applied. The project is a joint collaborative effort among the Bureau of Reclamation, U.S. Army Corps of Engineers, and U.S. Geological Survey on the studyof reservoir outlet maintenance activities. The 3D model is based on the solution of the Navier-Stokes equations along with sediment transport and mobile-bed modules. The numerical model results are compared with the field measurement results. Repeat land and bathymetric surveys, sediment sampling, and suspended sediment concentration measurement were made at the study site. The comparison allows us to evaluate the suitability of the numerical models for pressure flushing modeling. 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