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Last modified
11/23/2009 10:39:52 AM
Creation date
10/4/2006 9:55:38 PM
Metadata
Fields
Template:
Floodplain Documents
County
Statewide
Title
Multi-Objective Flood Mitigation Plan for Vermillion River Basin-South Dakota
Date
1/1/1994
Prepared For
South Dakota
Prepared By
FEMA
Floodplain - Doc Type
Flood Mitigation/Flood Warning/Watershed Restoration
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<br /> <br />FLOOD HAZARD MANAGEMENT, <br />DR A I NAG E, AND T RAN S P 0 R TAT ION <br /> <br />IS'TIl.ODUCTION <br />South Dakota has faced repeated tlooding <br />and Presidentially declared disasters. The <br />flooding potential in the Vermillion River Basin <br />has worsened in the past several decades as a <br />result of widespread changes in land use. One <br />of these is the development of better drainage <br />systems along several tributaries. These sys- <br />tems have reduced the amount of upland water <br />storage on agricultural fields and in natural <br />wetlands, and they also convey excess water to <br />the Vermillion River bottoms more efficient- <br />ly. Another land use change is new develop- <br />ment in drainage areas, which increases the <br />potential for property damage and loss of life. <br />South Dakota has lost 35%-45% of its <br />historical wetland acreage. Although the <br />amount of floodwater these wetlands could <br />have retained is not known. the impact of <br />their loss on the Basin's drainage is highly <br />visible during spring runoff and major <br />rainstorms: more water accumulates down- <br />stream faster. <br /> <br />The periodic flooding causes property <br />damage; loss of life; physical, emotional, and <br />economic disruption; and environmental <br />degradation. Previous methods of coping <br />with the flooding have been piecemeal and <br />ultimately unsuccessful. <br /> <br />TEAM 1 <br /> <br />ISSUE I <br /> <br />lACK OF COMPRHIENSIVE FLOOD- <br />PLAIN ....ND WATERSHED MANAGE- <br />MENT AND MITIGATION PLANNING <br /> <br />There is no coordinated local, state, or fed- <br />eral approach to watershed management <br />in the Vermillion River Basin. This has resulted <br />in actions being implemented in one part of <br />the Basin that have adverse effects on other <br />areas of the Basin. Because there is lillle or no <br /> <br />"Olle of the /hiIlR-' lVC lIoted as lI'e l\'ellt <br />. . <br />aroulld tf't' Basin met'/illg w;tl1 people <br />11'115 ",ore or /css tI call ji" better (Ot)r- <br />dillarioll (~r dmillogc [all'S, Illitigatioll, <br />I\'ct[(//III.' rt'Slt1mt;otl, tho.'Ct)'f't.'oftlli'lgs, <br />l\'ithil/ the Fermif/iol/ Basill. . . .Olle <br />sol/lt;ol/ cOl/ld be a cmtml water del'Cl- <br />OPlllt'/It (/lItl/IJrit)~ perhaps witll plall- <br />/lillg /llIIi zOllhlg P01WT, so tllalwemllld <br />take tI/IIore if/regrated approach 10 prt'. <br />.'en'j/lg water rt'StlllflT$ ami Ilpproach- <br />illR dmi/l(lRt' IIl/d !1oodi"R issllt's." <br />~ ~ . c <br /> <br />. <br /> <br />guidance from basin-wide. regional, or state <br />levels, those responsible for local and county <br />emergency management are hampered in <br />their mitigation planning. Conflicting federal <br />agency programs and missions and lack of <br />coordination need to be addressed. <br /> <br />POTENTIAL SOLUTION !-^ <br />Immediately establish a state f1oodplair1 man- <br />agement program office. <br />This office could be set up in the S.D. <br />Department of Environment and Natural <br />Resources, the S.D. Department of Transpor- <br />tation, the S.D. Water Congress, or the S.D. <br />Division of Emergency Management. <br />Funding is available on a 75%/25% <br />federal-state cost share from the Federal <br />Emergency Management Agency's National <br />flood Insurance Program's Community <br />As..~istance Program. <br /> <br />POT E N T I ^ I. SOl. UTI 0 N 1-1l <br />Establish a regional C(/I)rdindtor for ongoing infor- <br />/11I.ltion sharing on htlZiJrd mirigatior1, water <br />resources, and other related issues. <br />This solution could be implemented by <br />the Regional Planning District. the $.0. Water <br />Congress, local governments, loc.aI soil and <br />water conservation districts, the V.s. Soil <br />
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