Spatio-temporal Analysis of Texas Shoreline Changes Using GIS Technique PDF Download
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Author: Cesar Augusto Arias Moran
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
One of the most important aspects of coastal management and planning programs that needs to be investigated is shoreline dynamics. Long-term coastal analysis uses historical data to identify the sectors along the coast where the shoreline position has changed. Among the information that can be obtained from these studies are the general trend of coasts, either advancing or retreating. The erosion or accretion rates at each location can be used to forecast future shoreline positions. The current techniques used to study shoreline evolution are generally based on transects perpendicular to a baseline at selected points. But these techniques proved to be less efficient along more complex shorelines, and need to be refined. A new and more reliable method, the topologically constrained transect method (TCTM), was developed for this study and tested using data available for three sectors of the Texas Gulf Coast. Output data generated from TCTM also allowed performing shoreline evolution analysis and forecasting based on historical positions. Using topological constrained transects, this study provides a new method to estimate total areas of accretion or erosion at each segment of the coastline. Reliable estimates of future gains or losses of land along the coast will be extremely useful for planning and management decisions, especially those related to infrastructure and environmental impacts, and in the development of coastal models. Especially important is the potential to quickly identify areas of significant change, which eliminates the need for preliminary random sample surveying, and concentrate higher-resolution analyses in the most significant places. The results obtained in this research using the new methodology show that the Texas coast generally experiences erosion, with anthropogenic factors responsible for accretion. Accretion areas are located near coastal infrastructure, especially jetties that block the along shore sediment transport. The maximum erosion rate obtained in the study area is 5.48 m/year. This value helps make us aware of the powerful dynamic of the sector.
Author: Cesar Augusto Arias Moran
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
One of the most important aspects of coastal management and planning programs that needs to be investigated is shoreline dynamics. Long-term coastal analysis uses historical data to identify the sectors along the coast where the shoreline position has changed. Among the information that can be obtained from these studies are the general trend of coasts, either advancing or retreating. The erosion or accretion rates at each location can be used to forecast future shoreline positions. The current techniques used to study shoreline evolution are generally based on transects perpendicular to a baseline at selected points. But these techniques proved to be less efficient along more complex shorelines, and need to be refined. A new and more reliable method, the topologically constrained transect method (TCTM), was developed for this study and tested using data available for three sectors of the Texas Gulf Coast. Output data generated from TCTM also allowed performing shoreline evolution analysis and forecasting based on historical positions. Using topological constrained transects, this study provides a new method to estimate total areas of accretion or erosion at each segment of the coastline. Reliable estimates of future gains or losses of land along the coast will be extremely useful for planning and management decisions, especially those related to infrastructure and environmental impacts, and in the development of coastal models. Especially important is the potential to quickly identify areas of significant change, which eliminates the need for preliminary random sample surveying, and concentrate higher-resolution analyses in the most significant places. The results obtained in this research using the new methodology show that the Texas coast generally experiences erosion, with anthropogenic factors responsible for accretion. Accretion areas are located near coastal infrastructure, especially jetties that block the along shore sediment transport. The maximum erosion rate obtained in the study area is 5.48 m/year. This value helps make us aware of the powerful dynamic of the sector.
Author: Robert Dolan
Publisher:
ISBN:
Category : Coast changes
Languages : en
Pages : 236
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Book Description
Author: Alexcia C. Gray
Publisher:
ISBN:
Category :
Languages : en
Pages : 294
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Book Description
As human populations increase along coastlines, more emphasis is being placed on environmental protection, impact assessment and geomorphic evolution in coastal regions. Coastlines the world over play an important role in the economy of a nation but their location and geology makes them vulnerable to natural disasters. South Texas is no exception. Hurricanes invariably wreak havoc in the Gulf of Mexico on a yearly basis. Various methods are emerging to aid in the modeling of shoreline processes, specifically with the use of remote sensing and GIS-based data analyses. By comparing satellite imagery over long periods of time and before and after intense storm events, we can determine how much shorelines are changing in response to gradual evolution as well as catastrophic events, in order to develop better models for coastal processes. In this study, Galveston Bay and the surrounding area were investigated through analyses of aerial imagery data for 3 different times---1996, 2008 before Hurricane Ike and 2008 after Hurricane Ike which severely modified the Texas coastline in September 2008. Coastal landforms, including barrier islands, spits, bars and dunes and urban development are mapped at the 1km scale to show the changes in coastal geomorphology as a result of the passage of time as well as the catastrophic impact of one of the most destructive hurricanes to ever impact the Texas coast in recorded history. The findings suggest that over a period of 12 years (1996--2008), catastrophic events have a more significant impact on coastal geomorphology than coastal evolution due to the gradual passage of time.
Author: Robert A. Morton
Publisher: DIANE Publishing
ISBN: 1437902596
Category : Science
Languages : en
Pages : 44
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Book Description
Beach erosion is a chronic problem along open-ocean shores of the U.S. As coastal populations continue to grow and community infrastructures are threatened by erosion, there is increased demand for accurate info. regarding past and present trends and rates of shoreline movement, and a need for a comprehensive analysis of shoreline movement. This report on states bordering the Gulf of Mexico (Florida, Alabama, Mississippi, Louisiana, and Texas) summarizes the methods of analysis, interprets the results, provides explanations regarding the historical and present trends and rates of change, and describes how different coastal communities are responding to coastal erosion in 2004 (prior to Hurricanes Katrina and Rita). Illustrations.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 324
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Book Description
"Education, arts and social sciences, natural and technical sciences in the United States and Canada".
Author: Xiaojun Yang
Publisher: Springer Science & Business Media
ISBN: 3540881832
Category : Science
Languages : en
Pages : 560
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Book Description
In this landmark publication, leading experts detail how remote sensing and related geospatial technologies can be used for coastal ecosystem assessment and management. This book is divided into three major parts. In the first part several conceptual and technical issues of applying remote sensing and geospatial technologies in the coastal environment are examined. The second part showcases some of the latest developments in the use of remote sensing and geospatial technologies when characterizing coastal waters, submerged aquatic vegetation, benthic habitats, shorelines, coastal wetlands and watersheds. Finally, the last part demonstrates a watershed-wide synthetic approach that links upstream stressors with downstream responses for integrated coastal ecosystem assessment and management.
Author:
Publisher:
ISBN:
Category : Shore protection
Languages : en
Pages : 156
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Book Description
Author: Armando Montanari
Publisher: Sapienza Università Editrice
ISBN: 8898533012
Category : Business & Economics
Languages : en
Pages : 415
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Book Description
This volume is the completed section of the process of analytical research and methodological comparisons undertaken by SECOA, a 48-month research project selected and funded by the EU under the FP7 program. Hence, while scientifically autonomous, the volume is a natural link between the different phases of analysis within SECOA, i.e. Work Packages (WPs) 1-5, and the interpretive and predictive values that are being drawn up by WPs 7 and 8. Within the overall scope of SECOA's research activity, this volume's task was to supply answers to questions that will undergo further study by research groups. These groups will subsequently have to create methods and tools to identify the most suitable policies to effectively manage environmental conflicts, use fragile and rare resources more efficiently, and develop administrative structures capable of dealing with the needs of a continuously evolving society (the wisdom stage). It was also deemed necessary to construct possible alternative scenarios in order to contribute to an enhanced vision of sustainable urban development in coastal areas (the understanding stage). The findings of the research discussed in this volume are to be used to understand the relationships between the variables collected in the previous phases (WPs 1, 2, 3 and 4) of SECOA.
Author: Vít Pászto
Publisher: Springer Nature
ISBN: 3030266265
Category : Science
Languages : en
Pages : 325
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Book Description
This open access book is based on "Spationomy – Spatial Exploration of Economic Data", an interdisciplinary and international project in the frame of ERASMUS+ funded by the European Union. The project aims to exchange interdisciplinary knowledge in the fields of economics and geomatics. For the newly introduced courses, interdisciplinary learning materials have been developed by a team of lecturers from four different universities in three countries. In a first study block, students were taught methods from the two main research fields. Afterwards, the knowledge gained had to be applied in a project. For this international project, teams were formed, consisting of one student from each university participating in the project. The achieved results were presented in a summer school a few months later. At this event, more methodological knowledge was imparted to prepare students for a final simulation game about spatial and economic decision making. In a broader sense, the chapters will present the methodological background of the project, give case studies and show how visualisation and the simulation game works.
Author: Jayanta Das
Publisher: Springer Nature
ISBN: 3031641639
Category :
Languages : en
Pages : 465
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Book Description
