suggest risk reduction measures for landslide mitigation
Answers
Answer:
Explanation:
The simplest way to reduce the consequences of a hazard is to avoid developing in hazard prone areas. However this is not always possible, so risk reduction and mitigation measures may be required to lessen the severity of a disaster due to landslide hazard.
This use-case focuses on the process of identification and evaluation of cost-effective structural and non-structural landslide mitigation options that can be implemented during the planning and design of the building, or for retrofitting if the building has already been constructed. It also lists the site related structural, and non-structural measures that can be applied to protect building surroundings to reduce the landslide hazard consequences.
The purpose of this analysis is to assist decision-making and to guide the user in the choice of the most appropriate mitigation measures. It provides the ranking of the mitigation measures for potential landslides situations through simple weighted scoring factors for each evaluation criteria, and decision support matrix. The Mitigation measure are based on technology, experience, recommended practice and expert judgment and mitigation measures with the highest ranking can be considered as most appropriate. While weighing the potential measures for implementation it should be considered that how climate change and other global phenomena can affect the efficacy and reliability of the mitigation measures.
The Caribbean Islands are characterized by their intense heavy rainfall and steep slopes which give to frequent landslide occurrence. The steep slopes prevalent in these islands together with the materials underlying the slopes provide a favourable condition for landslide creation. Because these slopes are close to failure, their stability is likely to be affected by a small triggering effect and cause landslide. The main triggering factor is the rainfall. Most of the landslides are related to these human activities like road construction which disturb the natural slope characteristics and increase their probability of failure.
Answer:
Risk reduction measures for landslide mitigation are afforestation, construction of embankments, control of forest fire, soil nailing, and reduction in construction work near the slopes.
Explanation:
A landslide is a disaster that occurs due to natural or human causes. Natural causes include heavy rainfall, soil erosion, earthquakes, volcano, etc. and human activities including deforestation, construction of roads and buildings, overgrazing on hills, etc are also responsible for the occurrence of landslides.
Some mitigation measures for landslide reduction are described below:
a. Afforestation
- It refers to a plantation of new plants on bare lands.
- The roots of plants hold the soil particles tightly reducing the risk of landslides.
b. Construction of embankments
- A concrete wall can be constructed to reduce the landslides from falling into the human settlement area.
- These walls should be constructed on the bank of the river as well as on slopes and hills where the probability of falling landslide is high.
c. Control of forest fire
- Control of forest fire is another most effective measure for landslide control as it helps to conserve the plants.
d. Soil nailing
- It can be temporary or permanent and helps to stabilize the hills and slopes by embedding the huge nails perpendicularly into the ground.
- The nails hold the land masses as a result, we can minimize its risk.
e. Reduction of construction work
- Construction work and bombardment of hills for building new infrastructures make the land weak and control of these works reduces the risk of landslides.