Spillway and foundation erosion: Estimating progressive erosion extents
Conference
·
OSTI ID:220104
- Bureau of Reclamation, Denver, CO (United States)
- Colorado State Univ., Fort Collins, CO (United States); and others
Causal estimates of the Probable Maximum Precipitation (PMP) and Probable Maximum Flood (PMF) are generally larger than a statistical estimate based upon historical records. Over the past thirty years causal methods have replaced statistical methods for estimating the PMP. These changes in estimating procedures have made dam owners aware of deficiencies in spillway capacity. Dam owners, faced with this new awareness, must show regulating agencies a plan for satisfying a deficiency. Allowing a dam to overtop is an alternative for satisfying a spillway deficiency. This alternative requires an analysis of the potential for erosion of the dam foundation and abutments. Current methods of evaluating erosion extents have limited applicability. Existing erosion prediction formulas do not track erosion as a function of time, and have limited application in hard-rock or cohesive foundation materials.
- OSTI ID:
- 220104
- Report Number(s):
- CONF-9507190--
- Country of Publication:
- United States
- Language:
- English
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