Dauphin Island Causeway Resilience Enhancement

The Engineering and design of the breakwater is fund in this project to improved, protect plus enhance the resiliency of oyster along with marsh habitat that is adjacent to Dauphin Island Causeway. In this area, the Erosive forces like the wave, storms and the tidal action supply the constant threat to coastal habitats. Along the Bay side of a Causeway, the productive habitats of wetland is lost that forcing the transportation department of Alabama.For the installment and rely upon the revetment of riprap for the protection of the low lying corridor transportations. Dauphin Island Causeway or DIP (Parkway) serves as transportations for the connection among the Mobile country plus Dauphin Island and consequently its mean that evacuation of vehicles .Whereas the DIP is susceptible to flooding and the damage for the storm surges along with the waves in the coastal storms. The design of shoreline will increase the resilience along with to ensure the long term sustainability for coastal habitats in face of tides, wakes, winds plus the storm surges. The shoreline is also enhancing the   resilience of resources of fisheries through restoring the marsh habitat. (Nfwf.Org/gulf, 2019)

The objective of this project develops the new transportations designs for the segments of DIP among the Cedar point and the Alabama Port .And focused on the improvement for DIP which increases the resilience to future seal level and storm. While by providing the extra evacuation time plus times of reduce recovery. In this project the objective is develop the comprehensive enhancement plan of shoreline.  

Scope of Dauphin Island Causeway Resilience Enhancement

The Scope of this project covers the task that is necessary to evaluate the changes in feasibility level of the transportation connection which is capable to increase the resiliency and the sustainability of the Dauphin Island of Alabama. This study is focused on the improvement to DIP which increase resilience to storm. This study is study in the different task as shown in the work plan.

Work Plan of Dauphin Island Causeway Resilience Enhancement

Access existing conditions of Dauphin Island Causeway Resilience Enhancement

Flood research of Dauphin Island Causeway Resilience Enhancement

In this project the team will access the environmental data to determine the flood research. The erosion forces, flooding plus the storm surges have the importance which is altered for the Dauphin Island. The Dauphin Island is the less resilient because the repetitive storms, allowing the weaker storms that have the lager impact on Island. By this seasonal storm in more areas of the island become the flooded that interface with the transportations and the roads. The island is narrow plus the low lying, for the sea level rise in addition to flooding would adversely effected the existing conditions plus the potentially restrict to access around the Dauphin Island. Storms could flood, a causeway along with interface by the evacuation of an island. (Janasie & et.al, 2015)       

Survey of Dauphin Island Causeway Resilience Enhancement

          The team is research about the survey, for the historical shoreline surveys and the detailed channel of the dredging for the placement records in the primary sources. Evaluating the sediment of the transport quantities plus the patterns of the Mobile bay for the development of the operational sediment budget .For various Coastal area, the survey data is lacking for the detailed drawing.  

Ecosystem evaluation of Dauphin Island Causeway Resilience Enhancement

                Habitats that is important to identify the species as well as the ecosystems for the endpoints which help in the evaluation of the restoration alternatives. Team is determined the evaluation of the ecosystems, where the gulf environmental fund is preserve, protect to increase the natural habitat and the ecosystem functions. The marshes with the Gulf Coast of the Alabama are significantly for the productive ecosystems. (Gom.Usgs.Gov, 2017)    

Access geotechnical data of Dauphin Island Causeway Resilience Enhancement

            The research team will be accessing the geotechnical data in order to determine the information about the sites. Where the analysis of sites response is performed to determine the soil sites, and determine the strain and stress of the soil layers for the liquefaction evaluation. To access the geotechnical data, to determine the earthquake induced forces on slopes for the embankments to retained the earth structures  

Water Background of Dauphin Island Causeway Resilience Enhancement

Time to evacuation in case of storm of Dauphin Island Causeway Resilience Enhancement

        In the case of the storm the time to evacuation available generally 72 hours though its changes in a few hours  .Where the time to evacuation is the period among the actual occurrence of emergency.  

Traffic Volume Analysis of Dauphin Island Causeway Resilience Enhancement

            Time efficient and safe movements of the peoples as well as the goods are depending on the traffic flow that is directly connected to the characteristics of the traffic. Traffic flows have three main components speed, volume, and the density. In the case of the storm, the flow of the traffic is increased, due to the reduction of visibility plus the pavement friction.

Population estimation of Dauphin Island Causeway Resilience Enhancement

In the climate changes on the coastal flooding, combination of the growing population is raising the sea level to create the major hazards. Approximately 160 million populations, around the 50% lived in a coastal flood plan. (Lumbroso & et.al, 2017)   

Shoreline enhancement ideas of Dauphin Island Causeway Resilience Enhancement

Marsh of Dauphin Island Causeway Resilience Enhancement

The ideas of the shoreline enhancement is marsh is created to designed the entirely in the favor of ecological services. Where the ecological service is provided through the enhancement of shorelines is assumed more than the tested, by the idea in marshes. If the enhancement of the shoreline is physically protected then the marsh grass is grow. The extent of the marshes is determined through the slope of the shoreline, process of sediments, tide ranges plus the wave energy. Marsh grasses tend to grow efficiently in sediment used for the enhancement of the shoreline. (Bilkovic & et.al, 2017)      

Headland breakwaters of Dauphin Island Causeway Resilience Enhancement

            The ideas of shoreline enhancement is the headland breakwaters, which is helpful to mitigate the erosions of wave energy , stabilize the sediments , reduce the marsh, and improve the near shore habitat that is involved in the breakwater to refers the constructed shells of oyster. The breakwater is placed to obtain the suitable depth for an oyster reefs.   

 Oyster beds of Dauphin Island Causeway Resilience Enhancement

            An oyster bed is the idea of the shoreline enhancements that is helpful to increase the biodiversity in an immediate vicinity of a project sites. The oyster beds provide number of services for the ecosystems, involving the supporting of fishes populations water filtration and the shoreline protection. (Mobilebaynep.Com, 2014)   

Road resilience of Dauphin Island Causeway Resilience Enhancement

Raising elevation of Dauphin Island Causeway Resilience Enhancement

        The team will access the road resilience to determine the raising elevation; as the low lying barrier island by the raising elevation of 7.2 feet plus the barely the mile wide at the widest point, in Dauphin Island. The structure of elevation is increasing, to account the rising sea level. (Janasie & et.al, 2015)  

Flood routing ideas of Dauphin Island Causeway Resilience Enhancement

The ideas of the flood routing are a process of determining the shape as well as timing of the flood wave. The idea of the flood routing is;

·         Mass Curve Method

·         Storage indication method

·         Graphical method

Protection ideas of Dauphin Island Causeway Resilience Enhancement

The protection idea for the road resilience is given below;

Sea Wall of Dauphin Island Causeway Resilience Enhancement

            The Sea wall protection idea is helpful to protect the areas of human habitation, activities of leisure plus conservation from actions of tides, plus the waves of tsunamis. Seawall provided the term of the flood protection for the improvement plan in the long term resilience. Seawall is helpful for the liquefaction, and the large earthquakes.   

Sheet Pile of Dauphin Island Causeway Resilience Enhancement

The sheet pile is helpful to support the excavations for the basement, road resilience, and construct the bulkhead plus the seawall. Increase the road resilience of the sheet piles on the island.