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elative sea level rise is 0.33 cm/yr at Port Isabel (III) and 0.62 cm/yr at Galveston (IV). Using the Gornitz et al. (1982) eustaticcorrectlon factors the contribution of subsidence ranges between 0.1 cm/yr and 0.5 cm/yr. In contrast with Louisiana, subsidence is not the major driving process of relative sea level rise, although it is an important component. Conclusions 1. Analysis of National Ocean Survey tide gauge records from 9 stations along the U.S. Gulf Coast indicates that Louisiana is experiencing the highest rates of relative sea level rise in the Gulf of Mexico. Maximum relative sea level rise rates ranged between 1.03 cm/yr and 1.19 cm/yr. Texas ranked second with rates ranging between 0.33 cm/yr and 0.62 cm/yr followed by Florida with rates between 0.16 cm/yr and 0.22 cm/yr and then Mississippi-Alabama with a rate of 0.15 cm/yr. The NOS tide gauge stations detected an acceleration in relative sea level rise throughout the Gulf of Mexico, with the highest increase of 1.62 cm/yr found in Grand Isle, Louisiana. The amount of sea level rise acceleration appears to be proportional to the rate of relative sea level rise for the entire period. Acceler ation amounts range between 0.18 cm/yr and 1.62 cm/yr for two lunar epochs. 2. Subsidence rates determined from the NOS tide gauge records using the eustatic-correction factors for the Gulf of Mexico and the globe indicated Louisiana is experiencing the highest subsidence rates along the U.S. Gulf Coast. The maximum subsidence rates in Louisi ana ranged between 0.80 cm/yr and 1.07 cm/yr. Texas ranked second with subsidence between 0.10 cm/yr and 0.50 cm/yr. Subsidence rates in Mississippi, Alabama, and Florida suggest that these coastal zones are stable with respect to the Gulf of Mexico eustaticcorrection factor. However, using the global eustatic-correction factor the subsidence rates range from 0.03 cm/yr to 0.11 cm/yr. 3. The maximum rates of subsidence apply only for the Mississippi River delta plain in Louisiana and indicate that contribution of subsi dence to relative sea level rise ranges between 81 percent and 90 percent. In Texas the contribution for compactional subsidence is 30-81 percent and in Mississippi. Alabama, and Florida it is 0-48 percent, depending on the eustatic correction factor used. 4. The regional pattern of relative sea level rise and subsidence observed for Louisiana and the other U.S. Gulf Coast states is controlled by the thickness of the underlying Holocene sediment at each tide gauge station location. The highest rates of relative sea level rise and subsidence are associated with the Mississippi River delta plain where the Holocene section reaches a maximum thickness of about 200 m (Kolb and Van Lopik, 1958). East and west of the delta plain, the thickness of the Holocene section decreases to thicknesses of less than 20 m and in some cases pinches out com pletely, as in Florida. The rates of relative sea level rise and subsidence decrease concurrently east and west of Louisiana. 5. The rates of relative sea level rise are accelerating in Louisiana and the other U.S. Gulf Coast states. This acceleration is 673
674 proportional to the rate of relative sea level rise observed for the entire period of record at each station. These acceleration rates forecast that coastal Louisiana will experience a 1.5-2 m rise in sea level over the next century. These acceleration rates are con sistent with the forecasts of the National Academy of Sciences and the U.S. Environmental Protection Agency of accelerated relative sea level rise due to the greenhouse effect (Hoffman et al., 1983). Acknowledgements This investigation was sponsored by the Louisiana Geological Survey, U.S. Geological Survey, and the Terrebonne Parish government (James B. Edmonson). The authors would like to thank the National Ocean Survey (David Zilkoski, Steve Lyles and John Till), U.S. Army Corps of Engi neers (Jay Combe, John Miller, Greg Cambell, and Hark Soloman). and Lou isiana State University (Randy Hebert. Sandy Sparks, David Hilensky, Rick Bowen, Laree Lejeune, and Robin Sanders). Within the Louisiana Geological Survey, Tangular Williams typed the manuscript, Toni McLaugh lin assisted in preparing the graphics, and Jacquelyn Monday directed manuscript production.
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HT 390 .C66 C66 1986 v.2 Thomas EBi
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Copyright® 1987 The Coastal Societ
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"PROPERTY OF NOAA COASTAL K_CE3 CEN
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PLENARY SESSIONS TABLE OF CONTENTS
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CHARACTERIZING A SYSTEM Choir. Char
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TRACKING TOXICS Chair Susan Harvey
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The Use ofthe NationalWater DataExc
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The Site Selection Process foraChes
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MANAGING LIVING RESOURCES Resource
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Estuarine and CoastalManagement - T
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398 the particular Interests, envir
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400 data, a developer may discover
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Estuarine and Coastal Management
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fortune to work with several coasta
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growth economics, local feelings ab
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410 unprotected coastal barriers wi
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412 caveats. The greatest concerns
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Estuarine and Coastal Management -
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Model of Resort Evolution R. Initia
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Pensacola Beach Like Fort Myers Bea
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had again contributed to serious en
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Estuarine andCoastal Management -To
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High altitude and oblique aerial ph
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Estuarineand Coastal Management•
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432 system, the LEO system is start
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434 b. Hind observations (Figure 5)
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436 LEO PERCENT OCCURRENCE OF WAVE
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438 Estuarine and Coastal Managemen
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440 appropriate variables and param
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STEPbTSB NBICHBOB SBCBDI CANDISC NE
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Estuarineand Coastal Management Too
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(figures 1 and 2). On a first order
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variables. This resulted in a set o
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Estuarine andCoastal Management •
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help canaands and dictionaries are
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Access to System All requests for a
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460 Why Is NOAA Unarmed In ftnMfal
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462 To test this procedure, a simpl
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464 Cowardln, L.M.. V. Carter, F.C.
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466 between the participating indiv
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468 Data Search Assistance Through
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470 Additional Information For addi
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472 Estuarine andCoastal Management
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474 FIGURE 2 OPDIN RESOURCES NMPIS
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476 means ot access, determination
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478 NMPPO. 1985b. Inventory of Non-
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EDUCATING DECISIONMAKERS William Ei
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prediction of the effects of changi
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Management Oommittee did slightly r
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The causes of the degradation of wa
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quality. For a commission to adopt
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496 authorities prior to any land d
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498 boon based largely on ono piece
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500 Interstate Agreement on Chesape
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Estuarine and Coastal Management -T
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In general, though, these relations
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meetings. Their recommendations ver
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etveen any other academic departmen
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Many of these same demands vere mad
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Estuarineand Coastal Management- To
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The private sector The motivation f
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It's more and more obvious: those w
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The Center's role is limited to ide
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County. The resulting roport, "Cons
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and shellflshing; to provide open s
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The COD is innovative as a performa
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Estuarine andCoastal Management - T
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provide adequate information for a
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Aquaculture project The most recent
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CHESAPEAKEBAY VirginiaTippie,Chair
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542 program with an investment of 2
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Estuarine andCoastalManagement - To
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methodology being proposed - develo
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major sections of the 1972 Clean Wa
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Prioritizing makes best use of the
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Degradation of the Bay has taken a
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558 federal agencies, additional tr
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560 ing system 1t would be helpful
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obtained, or shoreline changes-were
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SAV was sighted as well as water co
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canadensis and Zannlchelia palustri
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greatest percent increases occurrin
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Orth, R.J., K.L. Heck, Jr. and J. v
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Bromley (1978) considered (1) propo
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2. Rnyulntorv nrogram-i A number of
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private nuisance is an interference
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property rule. If Congress passed s
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nonpoint source water pollution con
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Estuarineand CoastalManagement - To
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cannot be granted unless there is u
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ecomes subject to cancellation. An
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REFERENCES Morrison, M.D. and M.K.
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598 other agencies are Involved in
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600 requirements for dumping of ves
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602 oatorlal in the future. The oil
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Application of the doctrine of Impl
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oundaries of the dry sand area and
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compilation of existing data. Areas
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To rank areas based on observed con
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Page 224 and 225: satellites to the reserve system, a
Page 226 and 227: types of geomorphological features
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Page 230 and 231: productivity. The National Estuarin
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Page 234 and 235: equired to validate the sensitivity
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Page 238 and 239: Precision of the sediment quality v
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Page 242 and 243: Independent variable that is assume
Page 244 and 245: Possible outcomes of the experiment
Page 246 and 247: PREPARING FOR EMERGENCIES James McQ
Page 248 and 249: 648 The evacuation of more than 500
Page 250 and 251: 650 terminal; $220,000 for an oil s
Page 252 and 253: 652 U.S. Highway 98 damage estimate
Page 254 and 255: 654 Spangenbcrg, T. 1986. Personal
Page 256 and 257: LOUISIANA'S BATTLEWITH THE SEA; ITS
Page 260 and 261: Qco ISLES DERltt^ km & Figure 2. Hi
Page 262 and 263: Objectives The first objective of t
Page 264 and 265: STATION NUMBER STATION NAME TABLE 1
Page 266 and 267: The St. Petersburg tide gauge stati
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Page 272 and 273: References Byrne, P., Borengasser,
Page 276 and 277: these times that the increase in vu
Page 278 and 279: econstruction projects. Conclusion
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Page 284 and 285: BEACH EVOLUTION AFTER CAUSEWAY CONS
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Page 290 and 291: Inextricably wound up with religion
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Page 300 and 301: 708 these projects. Our criteria fo
Page 302 and 303: 710 S. alternlflora established on
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Page 310 and 311: 718 Nixon, S. W. 1980. Between coas
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734 assemblages; Juvenile fish and
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-J 736 The heavy material falls out
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738 Future Harsh Creation. We are n
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Estuarine andCoastal Management -To
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This site also satisfied several ot
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successful implementation of such a
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750 I.C.R.R Fig. I
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752 More lumber companieslaunched o
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754 the track. When ties nasoed rep
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756 Schlleder spared no expense, no
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758 Stover, j. F. 1955. The Railroa
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Estuarineand Coastal Management•
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contain detailed Information about
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production Is uncertain. Thus, the
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Estuarine and Coastal Management To
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MANAGING LIVING RESOURCES
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776 seagrasses and associated biota
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778 FLORIDA BIG BEND SEAGRASS HABIT
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780 Barle, S. A. 1972. Benthic alga
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Estuarine andCoastal Management-Too
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The Florida alligator nuisance prog
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In Louisiana, a computer simulation
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Florida Game and Fresh Water Fish C
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Estuarine and CoastalManagement - T
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794 Mississippi Born * Island Petit
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796" important means of preserving
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f 798 man-modified environments. Th
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