Author: William N. Seelig
Publisher:
ISBN:
Category : Beach erosion
Languages : en
Pages : 180
Book Description
An environmental study was conducted at Sargent Beach, Texas, an erosive beach bordering the Gulf of Mexico. The objectives of this study were to determine the characteristics of the beach, the magnitudes of changes which have occurred at Sargent Beach, and to analyze possible factors which may be controlling the observed beach changes. Results show the beach has eroded at an increasing rate since at least 1930 with recent shoreline retreat rates averaging 30 feet per year. Storms are the primary agents that remove material from the beach, while lost sediments are not replaced because Brazos River sands normally expected to move alongshore are trapped in the Brazos delta. Hurricanes may free stored deltaic sands carrying major quantities offshore from beach areas. Beach erosion is further aggravated by decreased sand input to the coast from the Brazos River due to alterations to the river and its drainage basin in the 1940's.
Investigation of Shoreline Changes at Sargent Beach, Texas
Author: William N. Seelig
Publisher:
ISBN:
Category : Beach erosion
Languages : en
Pages : 180
Book Description
An environmental study was conducted at Sargent Beach, Texas, an erosive beach bordering the Gulf of Mexico. The objectives of this study were to determine the characteristics of the beach, the magnitudes of changes which have occurred at Sargent Beach, and to analyze possible factors which may be controlling the observed beach changes. Results show the beach has eroded at an increasing rate since at least 1930 with recent shoreline retreat rates averaging 30 feet per year. Storms are the primary agents that remove material from the beach, while lost sediments are not replaced because Brazos River sands normally expected to move alongshore are trapped in the Brazos delta. Hurricanes may free stored deltaic sands carrying major quantities offshore from beach areas. Beach erosion is further aggravated by decreased sand input to the coast from the Brazos River due to alterations to the river and its drainage basin in the 1940's.
Publisher:
ISBN:
Category : Beach erosion
Languages : en
Pages : 180
Book Description
An environmental study was conducted at Sargent Beach, Texas, an erosive beach bordering the Gulf of Mexico. The objectives of this study were to determine the characteristics of the beach, the magnitudes of changes which have occurred at Sargent Beach, and to analyze possible factors which may be controlling the observed beach changes. Results show the beach has eroded at an increasing rate since at least 1930 with recent shoreline retreat rates averaging 30 feet per year. Storms are the primary agents that remove material from the beach, while lost sediments are not replaced because Brazos River sands normally expected to move alongshore are trapped in the Brazos delta. Hurricanes may free stored deltaic sands carrying major quantities offshore from beach areas. Beach erosion is further aggravated by decreased sand input to the coast from the Brazos River due to alterations to the river and its drainage basin in the 1940's.
Quantitative Analysis of Shoreline Change, Sargent, Texas
Author: James E. Sealy
Publisher:
ISBN:
Category : Beach erosion
Languages : en
Pages : 200
Book Description
The constantly increasing urban and industrial demands on Texas shorelines have placed great stress on a delicately balanced environment. There are tremendous political and economic incentives for the development of methods which will predict the reaction of the coastal system to planned man-made changes on or near the coastline, This thesis examines a method for shoreline stability analysis which could be used in conjunction with conventional studies of beach erosion rates to provide a more thorough understanding of the interaction of waves, the longshore current, and the coastal sediments. A method for the prediction of erosion and deposition rates related to the interaction of longshore currents and the sediment discharged at the mouth of a river is developed, and this method is applied to the new Brazos River delta near Freeport, Texas.
Publisher:
ISBN:
Category : Beach erosion
Languages : en
Pages : 200
Book Description
The constantly increasing urban and industrial demands on Texas shorelines have placed great stress on a delicately balanced environment. There are tremendous political and economic incentives for the development of methods which will predict the reaction of the coastal system to planned man-made changes on or near the coastline, This thesis examines a method for shoreline stability analysis which could be used in conjunction with conventional studies of beach erosion rates to provide a more thorough understanding of the interaction of waves, the longshore current, and the coastal sediments. A method for the prediction of erosion and deposition rates related to the interaction of longshore currents and the sediment discharged at the mouth of a river is developed, and this method is applied to the new Brazos River delta near Freeport, Texas.
Variability in Rates and Styles of Shoreline Retreat Generating a Sea Cliff and Wave-cut Platform at Sargent Beach, Texas
Author: Rose Palermo
Publisher:
ISBN:
Category :
Languages : en
Pages : 136
Book Description
Texas mainland beaches are characterized by a mudstone substrate and an overlying mobile layer of sand. Beaches exhibiting the highest rates of shoreline retreat erode into wave-cut platform or sea cliff morphologies, dependent on elevation above sea level. This study examines the relationship between temporal and spatial variability in shoreline retreat rates and shoreline roughness at Sargent, TX and how they are jointly controlled by changes in sand cover and storm wave intensity. Retreat of the cliff face is estimated as an annual rate by calculating the difference in cliff face position from repeat aerial photographs in 2009, 2010, 2011, 2012, 2014, and 2015. These average rates are 12.391 m/yr, 7.801 m/yr, 5.719 m/yr, 4,812 m/yr, and 3.699 m/yr respectively. Local roughness of the shoreline is also calculated for these cliff face positions. Average roughness values are 3.960 m, 6.679 m, 6.129 m, 5.563 m, 1.886 m, and 2.633 m respectively. Annual retreat rate is found to decrease linearly as roughness decreases. Monthly retreat rates throughout 2015 were measured using erosion pins. Monthly erosion rates were as low as 0 - 0.054 m/month and indicate that intervals of extreme erosion are necessary to produce the retreat observed over the course of a year. Monthly surveys of the wave-cut platform positioned immediately adjacent to the sea cliff record ~5 meters of shoreline retreat in 2015, demonstrating a strong spatial variability in shoreline retreat rate. Although this spatial variability exists over short timescales, the sea cliff and wave-cut platform erode linearly on the multi-decadal scale. The results of this study demonstrate that monitoring over a range of temporal and spatial scales is crucial to understanding the patterns and process which govern shoreline retreat along the Texas Gulf Coast.
Publisher:
ISBN:
Category :
Languages : en
Pages : 136
Book Description
Texas mainland beaches are characterized by a mudstone substrate and an overlying mobile layer of sand. Beaches exhibiting the highest rates of shoreline retreat erode into wave-cut platform or sea cliff morphologies, dependent on elevation above sea level. This study examines the relationship between temporal and spatial variability in shoreline retreat rates and shoreline roughness at Sargent, TX and how they are jointly controlled by changes in sand cover and storm wave intensity. Retreat of the cliff face is estimated as an annual rate by calculating the difference in cliff face position from repeat aerial photographs in 2009, 2010, 2011, 2012, 2014, and 2015. These average rates are 12.391 m/yr, 7.801 m/yr, 5.719 m/yr, 4,812 m/yr, and 3.699 m/yr respectively. Local roughness of the shoreline is also calculated for these cliff face positions. Average roughness values are 3.960 m, 6.679 m, 6.129 m, 5.563 m, 1.886 m, and 2.633 m respectively. Annual retreat rate is found to decrease linearly as roughness decreases. Monthly retreat rates throughout 2015 were measured using erosion pins. Monthly erosion rates were as low as 0 - 0.054 m/month and indicate that intervals of extreme erosion are necessary to produce the retreat observed over the course of a year. Monthly surveys of the wave-cut platform positioned immediately adjacent to the sea cliff record ~5 meters of shoreline retreat in 2015, demonstrating a strong spatial variability in shoreline retreat rate. Although this spatial variability exists over short timescales, the sea cliff and wave-cut platform erode linearly on the multi-decadal scale. The results of this study demonstrate that monitoring over a range of temporal and spatial scales is crucial to understanding the patterns and process which govern shoreline retreat along the Texas Gulf Coast.
Gulf Intracostal Waterway, Sargent Beach
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 364
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 364
Book Description
Historic Shoreline Changes in Texas
Author: William N. Seelig
Publisher:
ISBN:
Category : Coast changes
Languages : en
Pages : 28
Book Description
Publisher:
ISBN:
Category : Coast changes
Languages : en
Pages : 28
Book Description
Technical Report CERC
Author:
Publisher:
ISBN:
Category : Coastal engineering
Languages : en
Pages : 262
Book Description
Publisher:
ISBN:
Category : Coastal engineering
Languages : en
Pages : 262
Book Description
Water-resources Investigations Report
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 408
Book Description
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 408
Book Description
Shoreline Changes in the Vicinity of the Brazos River Delta (San Luis Pass to Brown Cedar Cut)
Author: Robert A. Morton
Publisher:
ISBN:
Category : Coast changes
Languages : en
Pages : 56
Book Description
Publisher:
ISBN:
Category : Coast changes
Languages : en
Pages : 56
Book Description
Miscellaneous Report - Coastal Engineering Research Center
Author: Coastal Engineering Research Center (U.S.)
Publisher:
ISBN:
Category : Coasts
Languages : en
Pages : 466
Book Description
Publisher:
ISBN:
Category : Coasts
Languages : en
Pages : 466
Book Description
Miscellaneous Report
Author: Coastal Engineering Research Center (U.S.)
Publisher:
ISBN:
Category : Coasts
Languages : en
Pages : 470
Book Description
Publisher:
ISBN:
Category : Coasts
Languages : en
Pages : 470
Book Description