John Barras (Former Employee)
Science and Products
Filter Total Items: 25
Constraining rates and trends of historical wetland loss, Mississippi River Delta Plain, south-central Louisiana Constraining rates and trends of historical wetland loss, Mississippi River Delta Plain, south-central Louisiana
The timing, magnitude, and rate of wetland loss were described for five wetland-loss hotspots in the Terrebonne Basin of the Mississippi River delta plain. Land and water areas were mapped for 34 dates between 1956 and 2004 from historical National Wetlands Inventory (NWI) datasets, aerial photographs, and Landsat Thematic Mapper (TM) satellite images. Since 1956, the emergent land area...
Authors
Julie Bernier, Robert A. Morton, John A. Barras
USGS reports latest land-water changes for southeastern Louisiana USGS reports latest land-water changes for southeastern Louisiana
The USGS National Wetlands Research Center is reporting that a total of 118 square miles of land has been transformed to new water areas in a 9,742 square mile area from the Chandeleur Islands to the Atchafalaya River. This area encompasses the basins of Breton Sound, Mississippi River, Pearl River, Pontchartrain, Barataria, Terrebonne and the western quarter of the Atchafalaya basin.
Authors
John A. Barras, James B. Johnston
Historical subsidence and wetland loss in the Mississippi delta plain Historical subsidence and wetland loss in the Mississippi delta plain
Five representative areas of the Mississippi River delta plain were investigated using remote images, marsh elevations, water depths, sediment cores, and radiocarbon dates to estimate the timing, magnitudes, and relative rates of marsh erosion and land subsidence at geological and historical time scales. In the Terrebonne-Lafourche region of rapid interior-wetland loss, former marshes...
Authors
Robert A. Morton, Julie Bernier, John A. Barras, Nicholas F. Ferina
Rapid subsidence and historical wetland loss in the Mississippi Delta Plain: Likely causes and future implications Rapid subsidence and historical wetland loss in the Mississippi Delta Plain: Likely causes and future implications
No abstract available.
Authors
Robert A. Morton, Julie Bernier, John A. Barras, Nicholas F. Ferina
Los impactos de las actividades relacionadas con el petroleo y el gas en la disminucion de los humedales costeros del delta del Misisipi Los impactos de las actividades relacionadas con el petroleo y el gas en la disminucion de los humedales costeros del delta del Misisipi
No abstract available.
Authors
Jae-Young Ko, John Day, John Barras, Robert Morton, James Johnston, Gregory Steyer, G. Paul Kemp, Ellis Clairain, Russell Theriot
Historical and projected coastal Louisiana land changes: 1978-2050 Historical and projected coastal Louisiana land changes: 1978-2050
An important component of the Louisiana Coastal Area (LCA) Comprehensive Coastwide Ecosystem Restoration Study is the projection of a “future condition” for the Louisiana coast if no further restoration measures were adopted. Such a projection gives an idea of what the future might hold without implementation of the LCA plan and provides a reference against which various ecosystem...
Authors
John Barras, Shelly Beville, Del Britsch, Stephen Hartley, Suzanne Hawes, James Johnston, Paul Kemp, Quin Kinler, Antonio Martucci, Jon Porthouse, Denise Reed, Kevin Roy, Sijan Sapkota, Joseph Suhayda
Science and Products
Filter Total Items: 25
Constraining rates and trends of historical wetland loss, Mississippi River Delta Plain, south-central Louisiana Constraining rates and trends of historical wetland loss, Mississippi River Delta Plain, south-central Louisiana
The timing, magnitude, and rate of wetland loss were described for five wetland-loss hotspots in the Terrebonne Basin of the Mississippi River delta plain. Land and water areas were mapped for 34 dates between 1956 and 2004 from historical National Wetlands Inventory (NWI) datasets, aerial photographs, and Landsat Thematic Mapper (TM) satellite images. Since 1956, the emergent land area...
Authors
Julie Bernier, Robert A. Morton, John A. Barras
USGS reports latest land-water changes for southeastern Louisiana USGS reports latest land-water changes for southeastern Louisiana
The USGS National Wetlands Research Center is reporting that a total of 118 square miles of land has been transformed to new water areas in a 9,742 square mile area from the Chandeleur Islands to the Atchafalaya River. This area encompasses the basins of Breton Sound, Mississippi River, Pearl River, Pontchartrain, Barataria, Terrebonne and the western quarter of the Atchafalaya basin.
Authors
John A. Barras, James B. Johnston
Historical subsidence and wetland loss in the Mississippi delta plain Historical subsidence and wetland loss in the Mississippi delta plain
Five representative areas of the Mississippi River delta plain were investigated using remote images, marsh elevations, water depths, sediment cores, and radiocarbon dates to estimate the timing, magnitudes, and relative rates of marsh erosion and land subsidence at geological and historical time scales. In the Terrebonne-Lafourche region of rapid interior-wetland loss, former marshes...
Authors
Robert A. Morton, Julie Bernier, John A. Barras, Nicholas F. Ferina
Rapid subsidence and historical wetland loss in the Mississippi Delta Plain: Likely causes and future implications Rapid subsidence and historical wetland loss in the Mississippi Delta Plain: Likely causes and future implications
No abstract available.
Authors
Robert A. Morton, Julie Bernier, John A. Barras, Nicholas F. Ferina
Los impactos de las actividades relacionadas con el petroleo y el gas en la disminucion de los humedales costeros del delta del Misisipi Los impactos de las actividades relacionadas con el petroleo y el gas en la disminucion de los humedales costeros del delta del Misisipi
No abstract available.
Authors
Jae-Young Ko, John Day, John Barras, Robert Morton, James Johnston, Gregory Steyer, G. Paul Kemp, Ellis Clairain, Russell Theriot
Historical and projected coastal Louisiana land changes: 1978-2050 Historical and projected coastal Louisiana land changes: 1978-2050
An important component of the Louisiana Coastal Area (LCA) Comprehensive Coastwide Ecosystem Restoration Study is the projection of a “future condition” for the Louisiana coast if no further restoration measures were adopted. Such a projection gives an idea of what the future might hold without implementation of the LCA plan and provides a reference against which various ecosystem...
Authors
John Barras, Shelly Beville, Del Britsch, Stephen Hartley, Suzanne Hawes, James Johnston, Paul Kemp, Quin Kinler, Antonio Martucci, Jon Porthouse, Denise Reed, Kevin Roy, Sijan Sapkota, Joseph Suhayda