course material

1. ENVS 2120 Introduction To Environmental Stewardship
Answer:
Introduction
One of the major concerns of the urban population is the fragility of the interface between
land and water.
This is further worsened by both the artificial and the natural factors
The coastal erosion therefore calls for remedies for the sake of protecting structures such as
monuments, valuable properties, Cultivated Lands and houses
Sea level rise worldwide
One the methods used for coastal protection and management is the sea wall construction
There are of diverse types
Parallel to the shoreline
Examples Of Seawalls
Have existed from as early as first BC
There are many around the world. Examples are:
1.The Vancouver Sea Wall
2.Alaskan Way Seawall
Factors For Their Success
They have been successful due to:

2. Deep foundation making them stable2
Earth anchors buried upland
Wide foundations
Conclusion
The seawall will fix the location of the coastline, but it will not arrest the ongoing erosion in
the coastal profile. On the contrary, it will to a varying degree, accelerate the erosion. It is
quite normal that the beach disappears in front of a seawall, and it will most often be
necessary, after some years, to strengthen the foot of the seawall with a rubble revetment.
A seawall will decrease the release of sediments from the section it protects and will have a
negative impact on the sediment budget along adjacent shorelines.
References
(1) Hadi, S. P.; Anggoro, S.; Purnaweni, H.; Yuliastuti, N.; Ekopriyono, A.; Hamdani, R. S.
Assessing the Giant Sea Wall for Sustainable Coastal Development: Case Study of Semarang
City, Indonesia. AACL Bioflux 2020.
(2) Nurhasanah, A.; Nizam; Triatmadja, R. Tsunami Force on A Building With Sea Wall
Protection. 3rd Int. Conf. Eng. Technol. Dev. 2014 2014.