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Submitted to: Watershed News
Publication Type: Popular Publication Publication Acceptance Date: 9/1/1997 Publication Date: N/A Citation: N/A Interpretive Summary: Summary article; no new research reported; no interpretive summary required. Technical Abstract: Stepped spillways are currently a common method to discharge flood flows. The steps significantly increase the rate of energy dissipation along the spillway face and reduce the size and cost of the downstream stilling basin compared to a conventional (smooth chute) spillway. The Natural Resources Conservation Service (NRCS) use RCC stepped spillways for some of their upstream flood prevention structures. Two of these spillways are: the Salado Creek Site 10 in San Antonio, Texas (completed in 1996), and the Cedar Run Site 6, Farquier County, Virginia (under construction). Concern for safety and because generalized criteria for the design of stepped spillways were limited, the NRCS contacted the Agricultural Research Service (ARS), Hydraulic Engineering Research Unit, Stillwater, Oklahoma, to conduct physical model studies of these spillways to evaluate the proposed designs. The results of these studies are presented in this paper. . |
