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Riverbank erosion is a significant problem for many countries, causing loss of land, infrastructure, and sometimes even human lives. The published online research papers describe the frequent flooding in the Segamat River Basin, Johor, Malaysia, and climate change scenarios.
The obtained results show increases in the flood peaks under both the land use change and climate change scenarios.
With the anticipated increase in development activities within the vicinity up to 2030, the overall impact of urbanization on the extent of flooding would be rather moderate, as the upper and middle parts of the basin would still be dominated by forests and agricultural activities (approximately 81.13%).
In contrast, the potential flood-inundated area is expected to increase from 12.25% to 16.64% under storms.
Erosion control is the practice of preventing or controlling water or wind erosion in land development, coastal areas, inland waterways and site construction.
Climate change and rising hillside developments contribute to erosion problems if preventive measures are not taken to protect the slopes.
Erosion from unprotected slopes can cause damage to infrastructure and disrupt operations in its surrounding areas, running up massive costs on repair work and downtime.
The geosynthetic erosion control mats are in use to provide bare soil retention, vegetation nurturing and high performance turf reinforcement.
Sand-filled mattresses are commonly used as a riverbank erosion protection measure. They are typically made of a geotextile fabric that is filled with sand and then stitched closed.
These mattresses can be used to provide protection against riverbank erosion by absorbing the energy of the water and preventing it from eroding the soil.
Some of the key points to consider when using these mattresses for riverbank erosion protection include:
To determine the extent of erosion and the potential for future erosion, the site assessment should be conducted to understand the type and size of mattress required.
The design requires to be based on the hydraulic and geotechnical conditions of the site. The mattress needs to withstand the flow of water and the weight of the soil.
Using a geotube will help trap sand and hold it in place to prevent continued erosion. Proper geotube installation is critical for the success of this erosion protection measure.
Geotube geocontainment technology has protected shorelines, rebuilt beaches, and reclaimed land from the sea. The mattress should be properly anchored to the riverbank to prevent it from being washed away during high flow events.
Regular inspection and maintenance are necessary to ensure that the mattress remains effective over time. Any damage or wear should be repaired promptly to prevent further erosion.
The use of sand-filled mattresses also have environmental impacts on the river and its ecosystem. It is important to consider the possible impacts and take measures to minimize them.
The geotubes are also better known as geobags, which are used for sludge dewatering projects of various sizes thanks to their simplicity and low-cost. These are the containers that are hydraulically filled with a slurry mix of sand and water.
The Geotube system can be applied in different industries, including shoreline protection, land reclamation, island creation, wetland creation, revetments and offshore structures.
After the successful geotube installation, the sludge is treated with specialist polymers and pumped into containers.
First, clear effluent water is drained, leaving the solid within the container. Once full, the containers are disposed of at a landfill, or sludge can be removed. The geotube installation process involves three steps:
The dredged material is pumped into the geotube container. Environmentally friendly polymers are introduced into the sludge, which makes the coagulate and water separate.
Clear effluent fluid drains from the geotube container through the small pores of a specially engineered textile. Consequently, an effective dewatering and efficient volume reduction of the contained materials occurred.
An approximate 99% of the solids are captured, and a clear filtrate is collected and recirculated through the system.
After the final cycle of filling and dewatering, the coagulate is left in the bag and continues to densify. This results in desiccation as the residual water vapor escapes through the fabric.
The projects are implemented using appropriate technology. With the use of high strength geotextile fabric and sand filled mattresses.
This technology has emerged as an effective means of protecting riverbanks from erosion. This is also implemented with a long term perspective and a focus on sustainability.
The riverbank erosion protection projects with sandfill mattresses and geotube installation provide a sustainable solution. This cost-effective and low-maintenance technology is easy to install and provides long-lasting stability while minimizing the need for rock or concrete structures.
The success of the project can be attributed to its focus driven approach, use of modern technology, and long term perspective.
Copyright © Gateway Structure Sdn Bhd (199401025111). All Right Reserved.