Combined Effect of Sea-Level Rise and Coastal Land Subsidence – Identification of Critical Transportation Infrastructure At-Risk in Coastal SPTC Region: Part I – Louisiana

Tewari, Sanjay; Louisiana Tech University. College of Engineering

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Combined Effect of Sea-Level Rise and Coastal Land Subsidence – Identification of Critical Transportation Infrastructure At-Risk in Coastal SPTC Region: Part I – Louisiana

2019-11-30
By Tewari, Sanjay

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English

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Creators:

Tewari, Sanjay
Corporate Creators:

Louisiana Tech University. College of Engineering
Corporate Contributors:

Southern Plains Transportation Center ; United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology

Southern Plains Transportation Center ; United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology Less -
Subject/TRT Terms:

[+]

ArcGIS Coasts Floods Forecasting Geographic Information Systems Infrastructure Land Subsidence Louisiana Risk Risk Assessment Sea-Level Rise Sea Level Spatial Analysis Subsidence (Geology)
Publication/ Report Number:

SPTC 17.1-10-1
Resource Type:

Tech Report
Geographical Coverage:

Louisiana ; United States

Louisiana ; United States Less -
Edition:

Final Report October 2017 – November 2019
Corporate Publisher:

Southern Plains Transportation Center
Abstract:

The coast of Louisiana is under threat because of sea-level rise and land subsidence. Seawater is encroaching deeper inland and as a result Louisiana is losing at an alarming rate. The combined effect of sea-level rise and land subsidence is variable spatially. This report focuses on this combined effect in identifying the transportation infrastructure that is at risk of getting affected by the sea-water inundation of the land. This report takes account of land elevation data monitored continuously at various locations along the coasts of Louisiana and combining it with local sea-level rise to arrive at the extent of land that will be lost because of rising seawater. GIS was used to process the collected data, put it in spatial format and identify the transportation infrastructure that is at risk for next 100 years, with 10-year increments starting from 2014. Open-source data made available by federal agencies was processed using ArcGIS to develop spatial surfaces and intersect those surfaces with transportation data. The results suggest that land subsidence in Louisiana is having greater impact on transportation infrastructure than sea-level rise. It is projected that by year of 3014, about 2,945 miles or 21% of the existing transportation infrastructure will be impacted because of the combined effect of land subsidence and rising sea level. This estimate does not take account of effectiveness of extensive levee system present in parts of coastal.
Format:

PDF
Funding:

DTRT13-G-UTC36
Collection(s):

University Transportation Centers
Main Document Checksum:

[+]

urn:sha256:1627aeb3aee63f2b3a447020d6348cebf31fe204163d651477870af8fc9fa125
Download URL:

https://rosap.ntl.bts.gov/view/dot/62266/dot_62266_DS1.pdf
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Combined Effect of Sea-Level Rise and Coastal Land Subsidence – Identification of Critical Transportation Infrastructure At-Risk in Coastal SPTC Region: Part I – Louisiana

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