Embankment Dam Failure Analysis (FEMA 541) - Association of ...

More documents

Recommendations

Info

The first half of the third day was devoted to presentations and discussions on research and new technology related to risk assessment, embankment dam failure, and flood routing. The afternoon of the third day was devoted to discussions prioritizing research needs. 2-2
3 SUMMARY OF WORKSHOP PRESENTATIONS ________________________________________________________________ The broad scope of the workshop presentations demonstrates the wide range of perspectives represented and the importance of the subject to the various entities involved. The material presented covered the spectrum from addressing concerns with developing solutions for specific immediate problems to identification of knowledge deficiencies that impede development of generalized tools, and from concerns related to the breach process itself to those related to the impacts of the resulting floodwave downstream. However, the presenters did an excellent job of focusing on the goals of the workshop and, together, these presentations present a relatively clear picture of the present state of the science in this area. This section provides a very brief overview of the material presented in the workshop, those presentations that included papers are referred by number to appendix B of this report. 1.1 Dam Failures 3.1.1 Classification and Case Histories of Dam Failures – Martin McCann, National Performance of Dams Program This presentation focused on an overview of the National Performance of Dams Program (NPDP). The NPDP acts as a public library of dam performance. The NPDP has several priorities: facilitating reporting of dam performance, providing access to basic information, data compilation and presentation, and research. Dr McCann gave an incident summary for the last 10 years related to total number of incidents, type of dam, type of incident, hazard classification, and height of dam. Dr. McCann also discussed the challenges in data collection and archiving of dam incidents/failures. The information is a resource to support dam engineering, dam safety, and public policy. 3.1.2 Human and Economic Consequences of Dam Failure- Wayne Graham, USBR (B-1) Mr. Graham’s presentation focused on 13 dam failures in the U.S. Included was every U.S. dam failure that caused more than 50 fatalities. The presentation included a discussion of dam characteristics, cause of dam failure, dam failure warning (if any), evacuation, and human and economic losses. Loss of life from dam failure can vary widely. In 1889, the 72-foot high earthfill South Fork Dam near Johnstown, PA. failed, killing about 2,200 people. This can be contrasted to the period, 1985 to 1994, when hundreds of smaller dams failed in the U.S. and less than 2% of these failures caused fatalities. Many of the dam failure images in Mr. Graham’s presentation are proprietary and not in the public domain. As such, dam failure images used in the presentation are not included in these proceedings. 3-1
Page 1: PROCEEDINGS FEMA WORKSHOP, JUNE 26-
Page 5: TABLE OF CONTENTS Page # OVERVIEW
Page 9: 2 OUTLINE OF THE WORKSHOP AGENDA __
Page 13 and 14: He also discussed research needs to
Page 15 and 16: what is reasonable to the engineer
Page 17 and 18: 4 DAM FAILURE ANALYSIS RESEARCH AND
Page 19 and 20: The break down of the individual to
Page 21 and 22: The break down of the individual to
Page 23 and 24: TOPIC NUMBER RESEARCH / DEVELOPMENT
Page 25 and 26: TOPIC NUMBER RESEARCH / DEVELOPMENT
Page 27 and 28: TOPICS Research/Development Topics
Page 29: TOPICS increasing VALUE 2 20 12 15
Page 33 and 34: A AGENDA __________________________
Page 35: B PRESENTATIONS ___________________
Page 38 and 39: Dam name: Williamsburg Dam (Mill Ri
Page 40 and 41: Dam name: Walnut Grove Dam Location
Page 42 and 43: Dam name: Saint Francis Dam Locatio
Page 44 and 45: Dam name: Baldwin Hills Dam Locatio
Page 46 and 47: Dam name: Black Hills Flash Flood (
Page 48 and 49: Dam name: Kelly Barnes Dam Location
Page 50 and 51: Dam name: Timber Lake Dam Location:
Page 53 and 54: Will a Dam Failure Occur? Assessing
Page 55 and 56: Reclamation’s Risk Management Res
Page 57 and 58: Roles of Dam Failure Analyses • I
Page 59: B-3
Page 62 and 63:
2/6/02 %DFNJURXQG ✦ 7UDGLWLRQDO &
Page 64 and 65:
2/6/02 (VWDEOLVKLQJ WKH %DVH 6DIHW\
Page 66 and 67:
2/6/02 &XUUHQW 'DP 6DIHW\ 5 ' ✦ 5
Page 68 and 69:
2/6/02 FRAMEWORK FOR RISK ASSESSMEN
Page 70 and 71:
2/6/02 1.6E-02 ([DPSOH /2/ 5LVN 'LV
Page 72 and 73:
2/6/02 5LVN $QDO\VLV 5 ' ✦ 0HWKRG
Page 75 and 76:
The Uncertainty of Embankment Dam B
Page 77 and 78:
model (Fread 1988). These models si
Page 79 and 80:
Predicted Breach Width (meters) 300
Page 81 and 82:
Table 1. - Uncertainty estimates of
Page 83 and 84:
Summary of Uncertainty Analysis Res
Page 85 and 86:
control seepage and uplift pressure
Page 87 and 88:
Results — Peak Outflow Estimates
Page 89 and 90:
Conclusions This paper has presente
Page 91:
B-5
Page 94 and 95:
each failure mechanics are not well
Page 96 and 97:
Fread (1971,1977,l988,l993) used a
Page 98 and 99:
3. Analytical Parametric Breach Mod
Page 100 and 101:
Figure 3. Side View of Dam Showing
Page 102 and 103:
Figure 5. Teton Dam: Predicted and
Page 104 and 105:
unsteady flow equations with the se
Page 106 and 107:
Figure 8. Routing Curves for SMPDBK
Page 108 and 109:
K and X are computed as follows: K
Page 110 and 111:
Figure 10. Profile of peak discharg
Page 112 and 113:
Fread,D.L., and Hsu,K.S. (l993) “
Page 115:
B-6
Page 118 and 119:
-Application of the numerical model
Page 120 and 121:
45 m 3 /s and at low water level di
Page 122 and 123:
Other recommendation deals with the
Page 124 and 125:
The 2-d flood calculations and the
Page 126 and 127:
The breach hydrographs for the loca
Page 128 and 129:
1) Rectangular mesh # 10m without b
Page 130 and 131:
5. DEVELOPMENT OF RESCUE ACTIONS De
Page 132 and 133:
Emergency action plans prepared ear
Page 134 and 135:
The determination of flow hydrograp
Page 137 and 138:
FEMA/USDA WORKSHOP OKLAHOMA CITY JU
Page 139 and 140:
SIGNIFICANT HAZARD POTENTIAL “Dam
Page 141 and 142:
SELECTING HAZARD POTENTIAL CLASSIFI
Page 143 and 144:
GUIDELINE GOALS • Repeatable Clas
Page 145 and 146:
Permanent Structures • Single fam
Page 147 and 148:
Lifeline Disruption Easy to Restore
Page 149 and 150:
ENVIRONMENTAL DAMAGE • Habitat an
Page 151 and 152:
RISK BASED ASSESSMENT 1. Assume fai
Page 153:
B-8
Page 156 and 157:
It is common that dam failure analy
Page 158 and 159:
A similar situation exists in dams
Page 160 and 161:
Edison Pond Dam may have resulted i
Page 163:
B-9
Page 166 and 167:
However, most of the dams that fail
Page 168 and 169:
The side slopes are sometimes steep
Page 170 and 171:
In Georgia, we use dambreak modelin
Page 172 and 173:
In closing, I wonder if we in the d
Page 175 and 176:
ADJUSTING REALITY TO FIT THE MODEL
Page 177 and 178:
CALIBRATION CORRELATION TO REALITY
Page 179 and 180:
New age modelers Post-modern hydrol
Page 181:
B-11
Page 184 and 185:
Step 1: Determine Dam Failure Scena
Page 186 and 187:
Table 1 Guidance for Estimating Whe
Page 188 and 189:
The parameter DV may be used to sep
Page 190 and 191:
Table 2 Recommended Fatality Rates
Page 193:
B-12
Page 196 and 197:
The procedure was intended to provi
Page 198 and 199:
Although this failure occurred seve
Page 200 and 201:
Qmax equation needs to be updated c
Page 203 and 204:
Dam Failure Analyses Workshop Oklah
Page 205 and 206:
Stability Analyses Programs to Dete
Page 207 and 208:
Milner Dam • Control of Seepage F
Page 209 and 210:
•7
Page 211 and 212:
Santee Cooper East Dam • The Emba
Page 213 and 214:
Dayton Dam Canal Embankment Failure
Page 215 and 216:
Canal Embankment - before failure 2
Page 217 and 218:
The Breach • With the reservoir s
Page 219 and 220:
Breach - 7/20/96 2/12/02 FERC-CRO J
Page 221 and 222:
July 22, 1996 Inspection • The ne
Page 223 and 224:
Secondary Breach Location 7/22/96 2
Page 225 and 226:
Horses on dunes 7/22/96 2/12/02 FER
Page 227 and 228:
Breach 9/30/96 2/12/02 FERC-CRO Jun
Page 229 and 230:
Reconstruction of the Canal Embankm
Page 231 and 232:
Filling in Canal Bottom 8/27/97 2/1
Page 233 and 234:
Impervious Core in breach 9/30/97 2
Page 235:
Canal Embankment 1/15/98 2/12/02 FE
Page 239 and 240:
Presentation for FEMA / USDA Worksh
Page 241 and 242:
• Life Safety Model • Environme
Page 243:
B-15
Page 246 and 247:
Case Study Setting The Chalk Hill h
Page 248 and 249:
ased on ranges given in the BRAECH
Page 251:
B-16
Page 263 and 264:
Current Dam Safety Research Efforts
Page 265 and 266:
Overtopping Facility • Near-proto
Page 267 and 268:
Flow Classification Nappe Flow Skim
Page 269 and 270:
Friction Factor 10.00 Darcy Frictio
Page 271:
Recent Developments in the Research
Page 274 and 275:
ACB Mats Placement 12
Page 276 and 277:
Vegetated Vegetated 14
Page 278 and 279:
Overtopping Testing Threshold Level
Page 280 and 281:
30 Design Curves 28 26 24 Articulat
Page 282 and 283:
Flow Flume Setup Top of flume wall
Page 284:
10 Analysis D 50 C u -0.25 [1.0805%
Page 289 and 290:
Limited Overtopping, Embankment Bre
Page 291 and 292:
development of concentrated flow, 2
Page 293 and 294:
0.1 k d (m 3 /N-h) 0.01 0.001 τ c
Page 295 and 296:
SUMMARY Research efforts at the ARS
Page 297:
B-19
Page 300 and 301:
Hydrologic Engineering Center Missi
Page 302 and 303:
Schematic of the Alamo Dam study ar
Page 304 and 305:
Cross-section Data Editor • Optio
Page 306 and 307:
Use of GIS/DEM data RAS cross secti
Page 308 and 309:
RAS Unsteady Flow • Overview •
Page 310 and 311:
Pre-processing Geometry • For uns
Page 312 and 313:
Bridge Hydraulic Properties Plot Hy
Page 314 and 315:
Unsteady Flow Simulation Manager 1.
Page 316 and 317:
Viewing Unsteady Flow Results • A
Page 318 and 319:
Gate Section
Page 320 and 321:
Future Work • Dam & Levee Breachi
Page 322 and 323:
Product Availability • Internal t
Page 325 and 326:
MORRIS 1 CADAM & IMPACT: European R
Page 327 and 328:
MORRIS 3 • To create a database o
Page 329 and 330:
MORRIS 5 • Dam-break wave along a
Page 331 and 332:
MORRIS 7 SELECTED RESEARCH FINDINGS
Page 333 and 334:
MORRIS 9 site. The results varied s
Page 335 and 336:
MORRIS 11 be appropriate for the si
Page 337 and 338:
MORRIS 13 Funding of European resea
Page 339 and 340:
MORRIS 15 Breach Formation Flood Pr
Page 341 and 342:
MORRIS 17 their findings and future
Page 343 and 344:
MORRIS 19 Theme 4 Sediment Movement
Page 345:
MORRIS 21 (Italy), Politechnika Gda
Page 349 and 350:
Issues, Resolutions, And Research N
Page 351 and 352:
and is presented in detail by Mark
Page 353 and 354:
The most commonly applied approach
Page 355 and 356:
Test no 1,2,3,5,7, and 8 will be us
Page 357 and 358:
• breach tests A local contractin
Page 359:
5. BUDGET AND TIME SCHEDULE The who
Page 362 and 363:
Catalino Cecilio Catalino B. Cecili
Page 364 and 365:
David Gutierrez California Dept. of
Page 366 and 367:
John Ritchey Dept. of Environmental
show all

Embankment Dam Failure Analysis (FEMA 541) - Association of ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?