Flood Report AnalysisPDF Document

53 Pages·2006·7.8 MB·English

Water Resoun:es Report Number 54
Flood Report Analysis
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MISSOURI DEPARTMENT OF NATIJRAL RESOURCES
Division ofGeology and land Survey
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Water ResourcesReport Number 54
Flood Report Analysis
by
Richard M Gaffney
1996
MISSOURI DEPARTMENT OF NATIJRAL RESOURCES
Division ofGeology and Land Survey
P.O. Box 250, RoUa, MO 65402-0250
[phone]
Missouri Classification Nwnber: MO!r-l"RGe 9:54
Gaffney, Richard M., 1996,FLCKJD REPORTANALYSIS,MissouriDepartment ofl\taturaJ Resources' Division
ofGeologyand LandSurvey, 44 p., 7figs., 11 this.
Asr«ipienlof./Mn"tdfunds, theMissouriI:JqH;IrtmDI1ofNaluruJRaoflroe:salntwldist:ri1rlirlitkll&llinstanyone0tIIbcbaNofma,color,
ruIl'icmaJon!'·.....se:l",wbandiulp. !Jll~beliaaWsWbtlSbreosa.<bjrckd10dlst:rimiPllllionforan),of~rrasons,1H/sMmay
fik aeomplainlwiJb ~dHI:JqH;I't'tmDIlofNalural RDouroe:sw the Ojftaof£I{uaI qpommi.!>', us. DqJQ~of~/nInior,
W4!binrm, D.C. 2()240
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TABlE OF CONTENTS
Page
Acknowledgements viii
Foreword 1
Introduction and Background 3
Synopsis 5
Flood Plain Managemenl 7
Hydrology Recorrunendations 11
Post-Flood Disasler AssisIaIlce " 15
Recorrunendations Relating lO Lending and Flood Insurance... . 17
Insurance Behind Levees Recommendation 19
Markel Value Defmition . . 21
Buy-Outs and Hazard Mitigation . . 25
Levee Policy . ................................... 29
Open Space and Environmenl Recorrunendations 33
Hazardous Malerials Policy 35
Afterword 39
Defmitions 41
Appenc:lix. Lisl ofReports 43
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Table 1 Flood Plain Management Recommendations _ 8
Table 2 Hydrology Recommendations 12
Table 3 Missouri River stage gages 14
Table 4 Disaster Aid Recommendations . ........................................ 16
Table 5 Recommendations Related to Lending and Insurance 18
Table 6 Insurance Behind Levees Recommendations 19
Table 7 Market Value and Buy-Out Recommendations ~6
Table 8 Levee Recommendations 30-31
Table 9 Open Space and Environment Recommendations 34
Table 10 Hazardous Materials Recommendations . .... 36
Table 11 AcronYJIlS 39
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Figure 1, Page 135, Galloway Report, Flood Claims . ........................................ 20
Figure 2, Page 126, Galloway Report, Repetitive Losses 22
Figure 3. Two FOrlllulae . 23
Figure 4, Rhineland Relocation 24
Figure 5, Principal Sources ofFunding for BUyOU15.......•............................................................... 27
Figure 6, Hisloric Flood Discharges, Boonville 37
Cart<X>n 1. The 500-year Flood 38
Figure 7. Floodway Defmition. IUustrated 42
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For assistance in the preparation of this Early drafts were reviewed by Jim
report, the following individuals and organi Alexander, Scon ToneD, Harold Morton, Ed
zations deserve recognition: the Honorable Sadler, Doug Edwards, James Hadley Will
Ervin Elsenraat. Mayor of Rhineland; Steve iams,,Mimi Garstang,JimMacy,OgleHopkins,
Etcher, Executive Director of the Boonslick SteveMdmosh,John Madras,John Drewand
Regional Planning Commission; Steven G. Charles Hays of various programs within the
Lauer, Director, SL Charles County Planning Department ofNatural Resources.
andZoningDepartment;GaryDybouse.Chief, ClericalsupponwasprovidedbyNeeole
HydrologicEngineeringSection,St.LouisDis Koestner; graphics, typeSetting and design by
trict..,U.S. ArmyCorpsofEngineers;]ackBurns, SusanDunn;editingandproductioncoordina
Service Hydrologist, National Weather Ser tion by Dwight Weaver, of the department's
vice's St. Louis Weather Forec:asl Office; and Division of Geology and Land Survey.
Herman C. Skaggs, ofthe Federal Emergency Contributions by these talented and
Management Agency's Eastern Missouri Field knowledgeable peoplehavemade this repo"
Office. a unique publication.
Floodingisa naturaleventand hasbeen influencing public policyin the areasofflood
characteristic ofrivers in Missouri throughout plain management, flood control, flood insur
its historyand prehistory. ance, flood disaster aid, and otherflood-relat
Floodingbecomesanaturaldisasterwhen ed issues.
itisofsuchmagnirudethatbothman-madeand 1h:reeofthe repor1S were commissioned
natural landforms are destroyed 01" seriously by some authority: The Rerxm and Recom
damaged. When human development (strUc mendations oftbe Governor's Task Force on
DJres and activities) are placed in the way of FloodPlainManagement, onbehalfofGover
such floodwaters, the damage becomes over nor Carnahan; The Floods of 93 - State of
whelming. Unlike the unpre-dictability of Missouri, by the Interagency Hazard Mitiga
tornadoes, placeswherefloods will occurcan tion Team set up by the Federal Emergency
be predicted. Flooding that is not ofmajor Management Agency, under the tenns of the
proportionshascertainbenefits. Forexample, Stafford Act of 1988; and Sharing the Chal
flooding rejuvenates wetland areas in flood lenge: Floodplain Management into the 21st
plains. Century, the report ofthe InteragencyFlood
Overthedecades, therehavebeendiver plain Management Review Committee to the
gent approaches to solving the problem of Administration (White House) Floodplain
occasional or recurrent flooding. These ap Management Task Force.
proaches essentially fit into three categories: Thefourth report, NationalFloodPol
(A) to deal with the flood hazard itself icy in Review- 1994, by the Association
(keep the water away from the people), of State Floodplain Managers (ASFPM),
(B)to dealwithhuman development(keep known as the organization "dedicated to
the people away from the water), and (C) reducing flood losses in the nation", was
to deal with howthe floods and thepeople voluntarily produced for the guidance of
come together (flood insurance and disas decision makers and planners.
ter assistance). Each ofthe four reportS approached the
problemofflooding from a differentperspec
TIllS DOCUMENT tive. The reports worded their recommenda
This document is an analysis offour re tions differently. This analysis of the four
ports which were published bystate and fed reports sought areas of commonality which
eral agencies as policy and planning docu could be brought to bear on the issue of
ments follOWing 1993 flooding in nine flooding in Missouri. Sometimes onlytwo or
midwesternslates. Therepomconlainrecom three repom touched on a given point, al
mendationsfor howto reduceflood damages though all four addressed some aspect of a
inthelikelyeventthatanotherlargemagnitude point. Where possible, this analysis shows
flood should QCcur in the future. The four where common wisdom pOints the wayto an
reportswerealsopublishedforthepurposeof improved approach to dealing with flooding.