Hydrologic Issues for Dams - Association of State Dam Safety Officials

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Paper 12 - Cecilio 66
67Paper 12 - Cecilio
Page 1 and 2:
The National DamSafety ProgramResea
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collaboration and expertise, and th
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TABLE OF CONTENTSPage #FOREWORD....
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NEW DEVELOPMENTS AND NEEDS IN SITE-
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FOREWORDThe Federal Emergency Manag
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The PMF represents an estimated upp
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RESEARCH AREASResearch needs were b
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Lack of Historical Data for Extreme
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should be developed that will allow
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• Storms used in HMR 55A and in t
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last 20,000 year s in submitting th
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d. USBR Guidelines Publication, Dam
Page 25 and 26: was severe. There was a potential,
Page 27 and 28: Thirdly, we must develop better way
Page 29 and 30: For most projects, the first step f
Page 31 and 32: Instead of lumping the loss rates t
Page 33 and 34: adjust the rating curve for when th
Page 35 and 36: In response to this situation, TVA
Page 37 and 38: TVA established a Regional Resource
Page 39 and 40: The Utah Hydrological ExperienceByM
Page 41 and 42: The Utah Hydrological ExperienceByM
Page 43 and 44: Late SpringRain on snow eventModel
Page 45 and 46: State of GeorgiaFEMA Workshop on Hy
Page 47 and 48: a. HEC1• DOS based program - glit
Page 49 and 50: Long te rm hydrologic needs include
Page 51 and 52: Current State and County PracticesA
Page 53 and 54: present standards and, as such, are
Page 55 and 56: Research Needs in Dam Safety Analys
Page 57 and 58: Looking at the four test cases give
Page 59 and 60: Hydrologic Analyses Related to Dam
Page 61 and 62: (iii) Modified Expected Cost Approa
Page 63 and 64: Parameter Estimation Based on Joint
Page 65 and 66: estimation of lag times and loss ra
Page 67 and 68: Hydrology for Dam Safety - Private
Page 69 and 70: Probable Maximum PrecipitationAll o
Page 71 and 72: The most common synthetic methods a
Page 73 and 74: the standard would be very conserva
Page 75: 65Paper 12 - Cecilio
Page 79 and 80: 69Paper 12 - Cecilio
Page 81 and 82: REFERENCES1. U. S. Army Corps of En
Page 83 and 84: Overview of Flood Estimation Proced
Page 85 and 86: Extreme FloodsExtreme floods, the t
Page 87 and 88: Temporal patterns used to distribut
Page 89 and 90: Preliminary Estimates of Rainfall a
Page 91 and 92: 24 to 72 hours). CRC Research Repor
Page 93 and 94: CURRENT AND FUTURE HYDROLOGIC RESEA
Page 95 and 96: ecause existing procedures are inad
Page 97 and 98: REGULATORY INVOLVEMENT AND COMMUNIC
Page 99 and 100: Decision BasisThe third feature of
Page 101 and 102: However, should it be revealed that
Page 103 and 104: supporting sub-processes. Therefore
Page 105 and 106: Probability ofFailure P f1Probabili
Page 107 and 108: Since any rigorous analysis is an i
Page 109 and 110: well, and usually do include subjec
Page 111 and 112: Against this background, there is n
Page 113 and 114: Howson, Colin., and Peter. Urbach.
Page 115 and 116: Procedures and Analysis Technologie
Page 117 and 118: Currently transposition limits for
Page 119 and 120: pro cedures are used to allow the h
Page 121 and 122: Use of Atmospheric Models in Rainfa
Page 123 and 124: mountain watersheds in response to
Page 125 and 126: 18. Schaefer MG, Stochastic Modelin
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dams which could be used to save li
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Hydrodynamic modelMIKE 21 BACKGROUN
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A FRAMEWORK FOR CHARACTERIZATION OF
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c) Decision Level Risk Assessment:
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credible estimates of extreme flood
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Fitting a distribution to data sets
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unoff volumes. Examples of this typ
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used to estimate frequency distribu
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Hosking, J.R.M., and J.R. Wallis, 1
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in west central Arizona. The draina
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Trial and error reservoir routings
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Figure 1 Alamo DamAlamo Dam and Spi
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Paper 19 - Chieh and Evelyn 146
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esources are made to mitigate flood
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implementing a risk-assessment meth
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Typically, the elevation of the top
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similar to that of the high-gradien
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and provides a cost-effective frame
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10000E. Colorado
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10000x Peak Discharge95% confidence
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An integrated science approach will
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ReferencesBaker, V.R., Kochel, R.C.
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Partnerships, Proceeding of the 200
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Flood HydrographThe flood hydrograp
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A variety of data including informa
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Improved Flood Frequency Extrapolat
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RESEARCH NEEDS SUMMARYJerry Webb, H
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o Unsteady flow computer models for
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• Upd ate “Generalized Snowmelt
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DISCUSSION1. Genera l - After the p
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participant was asked to pick what
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RISK ANALYSIS100Relative Comparison
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WORKSHOPONHYDROLGIC RESEARCH NEEDSF
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JOE SKUPIENPrincipal Hydraulic Engi
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Hydrologic Issues for Dams - Association of State Dam Safety Officials

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