Overview of Landslide Risk Reduction Studies in Sri Lanka

Bandara, R. M. S.; Weerasinghe, K. M.

doi:10.1007/978-3-642-31325-7_45

Cited by 6 publications

(5 citation statements)

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“…Countries with a national slope stability plan as part of their disaster risk management plan are still scarce. We found evidence of available plans only in Costa Rica (Andreas and Allan, 2007), Malaysia (Motoyama and Abdullah, 2013) and Sri Lanka (Bandara and Weerasinghe, 2013). While recently countries are starting to incorporate LS-DRR into their institutional frameworks (Gue et al, 2009), actual implementation remains low due to limited law enforcement (e.g.…”

Section: Strengthening Landslide Risk Governancementioning

confidence: 84%

“…Examples are the inclusion of LS-DRR topics in the university curricula and the training of officials on LS-DRR. A national education programme on LS has been introduced in Bangladesh (Ali et al, 2014), Colombia (Hermelin and Bedoya, 2008 ), India (Parkash, 2013), Malaysia (Abdullah, 2013), Sri Lanka (Bandara and Weerasinghe, 2013) and in Vietnam (Long et al, 2010). A distinctly small number of studies discuss the implementation of public awareness schemes and improvement of knowledge and skills on LS-DRR, despite the fact that this action is highly recommended (0.18) and the positive effects of such DRR actions (e.g.…”

Section: Resultsmentioning

confidence: 99%

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Landslide risk reduction measures: A review of practices and challenges for the tropics

Maes

Kervyn

Hontheim

et al. 2017

Progress in Physical Geography: Earth and Environment

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The overall objective of this review is to gain insights into landslide risk reduction measures that are applied or recommended in tropical landslide-prone countries, and the challenges at play. More specifically, this review aims to (i) presenting an overview of recent studies on landslides and landslide risk reduction in these countries, (ii) exploring the factors controlling the publication output on landslides and landslide risk reduction, (iii) reviewing the various landslide risk reduction measures recommended and implemented, and (iv) identifying the bottlenecks for the implementation of these strategies. A compilation of recommended and implemented landslide risk reduction measures in 99 landslide-prone tropical countries was made, based on an extensive review of scientific literature (382 publications). The documented measures are analysed using a scheme of risk reduction measures that combines classifications of the Hyogo Framework for Action and the SafeLand project. Our literature review shows that the factors influencing the number of publications on landslides and landslide risk reduction per country are (in order of importance) the absolute physical exposure of people to landslides, the population number and the Human Development Index of a country. The ratio of publications on landslide risk reduction versus publications on landslides for landslide-prone tropical countries does not vary much between these countries (average: 0.28). A significant fraction (0.30) of all known landslide hazard reduction measures are neither implemented nor recommended according to our review. The most recommended landslide risk reduction component is ‘risk management and vulnerability reduction’ (0.38). However, the most implemented component is ‘risk assessment’ (0.57). Overall, the ratio of implemented versus recommended landslide risk reduction measures in the tropics is low (<0.50) for most landslide risk reduction components, except for ‘risk assessment’ (3.01). The most cited bottlenecks for implementing landslide risk reduction measures are scientific (0.30) and political (0.29) in nature.

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Section: Strengthening Landslide Risk Governancementioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Landslide risk reduction measures: A review of practices and challenges for the tropics

Maes

Kervyn

Hontheim

et al. 2017

Progress in Physical Geography: Earth and Environment

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“…Therefore, risk analyses and assessments are essential tools for addressing the ambiguity characteristic of landslide hazards [38]. Landslide-prone hills have been identified by most districts [39] but, besides risk zoning, very few counter measures within Sri Lanka are specified in the literature [40]. In general, common counter measures and reinforcement designs include surface water management using drainage systems [14], the modification of slope geometry, reinforcement by soil nailing, or the installation of protective nets [41].…”

Section: Introductionmentioning

confidence: 99%

Risk Assessment in Landslide-Prone Terrain within a Complex Geological Setting at Kadugannawa, Sri Lanka: Implications for Highway Maintenance

Pitawala,

Wimalakeerthi,

Heinze

2024

Geotechnics

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The major highway in Sri Lanka that links the capital, Colombo, with the second capital, Kandy, passes through Kadugannawa, characterized by steep hills. The geological and geomorphological setting of the terrain often leads to slope failures. The objective of this study is to interpret the key factors influencing the slope failures that occurred in close proximity at two separate locations with two different slope conditions. Typical local and regional brittle and ductile structures include fault scarps, deep-seated detachments, and variable folding. According to our results, one of the studied locations experienced translational landslides because of weakened basement rock surfaces, hydrophilic clay minerals, and anthropogenic influences, whereas the other location experienced multiple stages of mass movement influenced by inhomogeneous colluvial soil and regional, geological, and hydrogeological conditions. Based on the present study, it can be concluded that geological studies must be carried out within the local area rather than at the regional scale. Otherwise, the constructions for the prevention of landslides in complicated geological settings will fail or may not be used for a long period. Moreover, consideration of future climate change is essential when undertaking construction in challenging terrains.

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“…Economic losses from landslides include compensation costs for its recovery and some even invite poverty as well. Economic losses from landslides have been increasing over the past years (Petley, 2005) mainly due to unsustainable human practices, increasing development, investment in the landslide-prone area and increasing frequency of its occurrence (Bandara, 2013). Hence, it is one of the most destructive natural disasters that invites a huge damage of property, structural damage and economic loss to even loss of lives.…”

Section: Introductionmentioning

confidence: 99%

Socio-Economic Impacts of Landslides and Applied Mitigation Techniques: A Case Study in Bagnaskali, Nepal

Shakya,

Sigdel,

Pokhrel

2023

J. Stabil. Environ. Mgt

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This study aimed to estimate the socio-economic impacts of landslides and identify mitigation techniques being applied for landslide control in Bagnaskali rural municipality, Palpa. Purposive sampling was conducted to focus the research on plots with frequent landslide occurrences. Out of the 20 identified landslide-prone sites, a random sampling method was used to ensure representative data collection with a 40% sampling intensity. Data were collected through direct observation, transect walks, and household surveys conducted in areas prone to landslides. Additionally, discussions were held with key informants, the technical team, and experts in the field to validate the collected data. In Bagnaskali rural municipality in the year 2020, six households reported damage, two cases of death occurred, 24 livestock fatalities were recorded, and there was damage to cultural heritage due to landslides, resulting in social losses. Affected communities also incurred compensatory losses ranging from NRs 10 to 50 lakhs due to the destruction of water resources, road blockages, and agricultural land damage. As mitigation measures for landslides, the municipality applied civil engineering techniques such as gabion walls, masonry, culverts, check dams, and reinforced concrete (RCC), as well as bioengineering techniques including plantation, wattling, and brush-layering. Civil engineering techniques were prioritized for mitigating landslides, with bioengineering serving as a supporting base. Plots where both civil and bioengineering techniques were employed together exhibited greater slope stability and reduced vulnerability. Therefore, it is recommended to use mitigation techniques that stabilize slopes and reinforce the soil to control landslide hazards effectively. To successfully reduce landslides and protect vulnerable communities, comprehensive policies, laws, and investments are required. Technical and financial assistance from governmental and non-governmental sectors is essential to minimize the impacts of landslides and implement the most effective mitigation techniques for landslide control.

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Overview of Landslide Risk Reduction Studies in Sri Lanka

Cited by 6 publications

References 0 publications

Landslide risk reduction measures: A review of practices and challenges for the tropics

Landslide risk reduction measures: A review of practices and challenges for the tropics

Risk Assessment in Landslide-Prone Terrain within a Complex Geological Setting at Kadugannawa, Sri Lanka: Implications for Highway Maintenance

Socio-Economic Impacts of Landslides and Applied Mitigation Techniques: A Case Study in Bagnaskali, Nepal

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