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Thursday, August 6, 2020 | History

2 edition of Relationship between canal and levee density and coastal land loss in Louisiana found in the catalog.

Relationship between canal and levee density and coastal land loss in Louisiana

R. E. Turner

Relationship between canal and levee density and coastal land loss in Louisiana

by R. E. Turner

  • 230 Want to read
  • 39 Currently reading

Published by U.S. Dept. of Interior, Fish and Wildlife Service, Research and Development, National Wetlands Research Center in Washington, DC .
Written in English

    Places:
  • Louisiana,
  • Gulf Region.
    • Subjects:
    • Coast changes -- Louisiana -- Gulf Region.,
    • Canals -- Louisiana -- Gulf Region.,
    • Levees -- Louisiana -- Gulf Region.

    • Edition Notes

      Statementby R. Eugene Turner ; project officer, Carroll L. Cordes.
      SeriesBiological report ;, 85 (14) (Dec. 1987), Biological report (Washington, D.C.) ;, 85-14.
      ContributionsCordes, Carroll L., National Wetlands Research Center (U.S.), Louisiana Universities Marine Consortium.
      Classifications
      LC ClassificationsGB459.25 .T87 1987
      The Physical Object
      Paginationxii, 58 p. :
      Number of Pages58
      ID Numbers
      Open LibraryOL2495894M
      LC Control Number87619886

        Louisiana’s master plan to rebuild the coast came with a bold goal: to halt the wetlands loss that sees an average of a football field eroding away from the coast. Without land-building sediment from the river, the delta is doomed to continue shrinking, endangering people, wildlife and jobs in coastal Louisiana. Shipping Channels and Canals: A vast network of shipping channels – including the Mississippi River Gulf Outlet (MRGO), the Houma Navigational Canal and the Freshwater Bayou Canal -- allow salt.

      The Department of Interior has estimated that those canals, averaging 12 to 15 feet deep and to feet wide, resulted in the loss of an additional square miles of coastal land. By   To put this land loss into perspective, Louisiana loses an area greater than New Orleans ( square miles) every years. Alarmed by the disappearance of these wetlands, many concerned citizens now believe that unless corrective measures are initiated soon, the damage to the coastline’s fragile ecosystems will be irreversible.

      Between and the land loss rate in the Mississippi River Delta Basin averaged 1, acres per year, or percent of existing land area (Dunbar, Britsch, and Kemp ). Between the mid's and , the estimated land loss rate for the basin was 2, acres per year. Land loss is the dominant process occurring in the Louisiana coastal marshes, and a majority of this is due to anthropogenic alterations. Flooding is essential to the health of the marshes and represents the primary accretionary processes through deposition of mineral sediments from fluvial and marine processes, which occur during the construction phase of deltaic cycle.


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Relationship between canal and levee density and coastal land loss in Louisiana by R. E. Turner Download PDF EPUB FB2

Relationship between canal and levee density and coastal land loss in Louisiana. Washington, DC: U.S. Dept. of Interior, Fish and Wildlife Service, Research and Development, National Wetlands Research Center, Relationship between canal and levee density and coastal land loss in Louisiana [microform] / by R.

Eugene Turner ; project officer, Carroll L. Cordes U.S. Dept. of Interior, Fish and Wildlife Service, Research and Development, National Wetlands Research Center Washington, DC Australian/Harvard Citation.

Relationship Between Canal and Levee Density and Coastal Land Loss in Louisiana Paperback – January 1, by R. Eugene Turner (Author) See all formats Author: R. Eugene Turner. ABSTRACT / Annual coastal land loss in the sedimentary deltaic plain of southern Louisiana is km 2, which is correlated with man- made canal surface area.

The relationships between land loss and canals are both direct and indirect and are modified by the deltaic. Relationship between canal and levee density and coastal land loss in Louisiana / By R.

(Robert Eugene) Turner, Carroll L. Cordes, U.S. Fish and Wildlife. Research and Development. Turner, R. Relationship between canal and levee density and coastal land loss in Louisiana. US Department of Interior, Fish and Wildlife Service, National Wetlands Research Center.

Biological Report 85 (14). Coastal Erosion in Louisiana is the process of steady depletion of wetlands along the state's coastline in marshes, swamps, and barrier islands, particularly affecting the alluvial basin surrounding the mouth of the Mississippi River at the foot of the Gulf of Mexico on the Eastern half of the state's coast.

In the last century, Southeast Louisiana has lost a large portion of its wetlands and. Annual coastal land loss in the sedimentary deltaic plain of southern Louisiana is km2, which is correlated with man-made canal surface area. The relationships between land loss and canals are both direct and indirect and are modified by the deltaic substrate, distance to the coast, and availability of new sediments.

Loss rates are highest in the youngest of the former deltas nearest the. and effect relationship has been established between modern fault movement and the catastrophic land submergence and loss that has occurred in coastal Louisiana during the last 50 years (Gagliano et al.

a, b.) The GNO area lies along the upper margin of the Eastern Tectonic Province of the Gulf Coast Salt Dome Basin (Figure 7). The Department of Interior has estimated that those canals, averaging 12 to 15 feet deep and to feet wide, resulted in the loss of an additionalacres of coastal land.

Relationship between Wetlands and Estuaries and Fish Stocks 86 Regulating Services 87 Cultural Goods and Services 87 n o ti a e r c e R 7 8 Table Economic Impact on Output in Coastal Louisiana From Land Loss (Moderate, 50 years), Top 10 Sectors 64 Table Top 10 Economic Impact on Output in Rest of Louisiana From Land Loss.

Coastal wetlands disappearing. While Louisiana has 40% of the country’s wetlands, over 90% of the total coastal marsh loss in the continental U.S.’s occurs in the state.

It is estimated that between square miles of wetlands are lost each year and more than 1, acres have been lost since the turn of. An earlier investigation (Turner ) concluded that most of the coastal wetland loss in Louisiana was caused by the effects of canal dredging, that loss was near zero in the absence of canals.

Louisiana has been losing coastal wetlands since at least the s, but the long-term rate of land loss has slowed since its peak in the s, and U.S. Geological Survey scientists have recently found a further slowing since Relationship between canal and levee density and coastal land loss in Louisiana.

Technical Report Turner, R E. Nearly 1% of Louisiana's coastal land becomes water each year. This land loss affects everything from wildlife, fisheries, and recreation to the economy and culture. relative sea-level rise and vertical marsh accretion is.

Many Louisiana residents are concerned about coastal land loss, but less than half of the respondents to a statewide poll conducted by Lucid exclusively for | The Times-Picayune believe. Louisiana lost nearly 1, square miles of land between toand between and wetlands were lost at a rate of square miles per year – a.

The apparent temporal and spatial synchrony of canal density growth and wetland losses were not apparent until there was significant geospatial documentation of land.

Coastal land area in Louisiana could not be measured until the s because: 1) photographic records did not exist, 2) coastal maps in the s recorded only stylized.

Bass A, Turner RE. Relationships between salt marsh loss and dredged canals in three Louisiana estuaries. J Coastal Res ; 95– View Article Google Scholar Britsch D, Dunbar JB. Land loss rates: Louisiana coastal plain. J Coastal Res ;– View Article. $ billion Business disruption costs due to land loss alone; The risk of continued land loss is concentrated in coastal Louisiana, but the economic implications will spread throughout the nation due to the state's importance in shipping, energy production, chemicals and other sectors.

Louisiana’s Coastal Land Loss. Louisiana’s Coastal Land Loss A growing concern for the people of Southeast Louisiana is the state’s coastal land loss which has been occurring with increasing speed in the last few years.

This land loss is a result of the parasitic relationship between. Bob Marshall, a reporter with the New Orleans news site The Lens, has covered coastal land loss in Louisiana for decades. He collaborated with ProPublica to publish the new report. There are also more t oil wells in Southern Louisiana’s wetlands and in its coastal waters, and the well-heads and supply boats appeared in increasing density as .