scholarly journals Horizontal drilling drainage as a preventive measure for water induced landslide risk reduction: A case study from Sindhuli Road, Section I, Nepa

2018 ◽  
Vol 55 (1) ◽  
pp. 109-122
Author(s):  
Shanmukhesh Chandra Amatya ◽  
Mikihiro Mori
Keyword(s):  
Risk Reduction ◽  
Water Pressure ◽  
Annual Rainfall ◽  
Landslide Risk ◽  
Horizontal Drilling ◽  
The Road ◽  
Road Section ◽  
Landslide Mass ◽  
The Impact ◽  
Landslide Risk Reduction

Nepal is a mountainous country which covers about 83% area of the Higher Himalaya, mountain and hills with rugged topography and highly tectonic geology. Most of those areas are prone to sediment related water induced disasters such as slope failure, debris flow, and landslide which are triggered due to torrential rainfall during the monsoon rainy season, and that causes the loss of lives and properties, infrastructures and environmental degradation each year. The annual rainfall ranges from 2000 to 3000 mm (in the Central Region of Nepal). The natural disasters cannot be prevented completely but efforts can be made for mitigating the impact of the disasters. Among the mitigation measures of water induced landslide disasters, the Horizontal Drilling Drainage Technology is one of the most effective counter measures of landslide risk reduction. The main purpose of this technology is to release the pore water pressure in the landslide mass by reducing the groundwater level. The landslide disaster prone Kamala Mai village area lies along the Sindhuli road section I, the National Highway, in Sindhuli District, Nepal which was generating subsidence and creeping of the road each year since many years back. This method was applied in the Sindhuli road Section I, Chanaige 29+300, Kamala Mai Village area. The result obtained from the application of the method shows an effective achievement to the Sindhuli road stability and the road users as well. Recommendation has been made to replicate the technology in other places of the country also in similar environment.  

Analisis Longsor Cililin Dan Model Pengupayaan Kestabilan Lerengnya

2019 ◽  
Vol 16 (3) ◽  
Author(s):  
Wisyanto
Keyword(s):  
Land Cover ◽  
Risk Reduction ◽  
Disaster Risk Reduction ◽  
Disaster Risk ◽  
Landslide Risk ◽  
West Java ◽  
Water Condition ◽  
Reduction Program ◽  
Landslide Risk Reduction

Landslides have occurred in various places in Indonesia. Likewise with West Java, there were many regions that has experienced repeated landslides. Having many experience of occurrences of landslides, we should have had a good landslide risk reduction program. Indeed, the incidence of landslides depends on many variables. Due to that condition, it may that a region would have different variable with another region. So it is impossible to generalize the implementation of a mitigation technology for all areas prone to landslides. Research of the Cililin's landslide is to anticipate the next disasters that may happen in around the area of 2013 Cililin Landslide. Through observation lithological conditions, water condition, land cover and landscape, as well as consideration of wide dimension of the building footing, the distance of building to the slopes and so forth, it has been determined some efforts of disaster risk reduction in the area around the landslide against the occurrence of potential landslide in the future.Bencana tanah longsor telah terjadi di berbagai tempat di Indonesia. Demikian halnya dengan Jawa Barat, tidak sedikit daerahnya telah berulang kali mengalami longsor. Seharusnya dengan telah banyaknya kejadian longsor, kita mampu mengupayakan program penurunan risiko longsor secara baik. Memang kejadian longsor bergantung pada banyak variabel, dimana dari satu daerah dengan daerah yang lain akan sangat memungkinkan mempunyai variabel yang berbeda, sehingga tidak mungkin kita membuat generalisasi penerapan suatu teknologi mitigasinya untuk semua daerah rawan longsor. Penelitian longsor di Cililin dilakukan untuk mengantisipasi terjadinya bencana di sekitar daerah Longsor Cililin 2013 yang lalu. Melalui pengamatan kondisi litologi, keairan, tutupan lahan dan bentang alam yang ada, serta pertimbangan akan dimensi luas pijakan bangunan, jarak batas bangunan dengan lereng dan lain sebagainya, telah ditentukan beberapa upaya penurunan risiko bencana di daerah sekitar longsor terhadap potensi kejadian longsor dimasa mendatang.Keywords: Landslide, risk reduction, footing of building, Cililin

scholarly journals Community-based landslide risk reduction: a review of a Red Cross soil bioengineering for resilience program in Honduras

Landslides ◽  
2019 ◽  
Vol 16 (9) ◽  
pp. 1779-1791 ◽  
Author(s):  
Silvia Hostettler ◽  
Anton Jöhr ◽  
Carlos Montes ◽  
Antonio D’Acunzi
Keyword(s):  
Risk Reduction ◽  
Red Cross ◽  
Landslide Risk ◽  
Community Based ◽  
Soil Bioengineering ◽  
Landslide Risk Reduction

scholarly journals Mass transport of contaminated soil released into surface water by landslides (Göta River, SW Sweden)

2012 ◽  
Vol 16 (7) ◽  
pp. 1879-1893 ◽  
Author(s):  
G. Göransson ◽  
M. Larson ◽  
D. Bendz ◽  
M. Åkesson
Keyword(s):  
Surface Water ◽  
Contaminated Soil ◽  
Suspended Particle ◽  
Transport Processes ◽  
Landslide Risk ◽  
Suspended Sediment Transport ◽  
River Stretch ◽  
Landslide Mass ◽  
Exposure Pathway ◽  
The Impact

Abstract. Landslides of contaminated soil into surface water represent an overlooked exposure pathway that has not been addressed properly in existing risk analysis for landslide hazard, contaminated land, or river basin management. A landslide of contaminated soil into surface water implies an instantaneous exposure of the water to the soil, dramatically changing the prerequisites for the mobilisation and transport of pollutants. In this study, an analytical approach is taken to simulate the transport of suspended matter released in connection with landslides into rivers. Different analytical solutions to the advection-dispersion equation (ADE) were tested against the measured data from the shallow rotational, retrogressive landslide in clayey sediments that took place in 1993 on the Göta River, SW Sweden. The landslide encompassed three distinct events, namely an initial submerged slide, followed by a main slide, and a retrogressive slide. These slides generated three distinct and non-Gaussian peaks in the online turbidity recordings at the freshwater intake downstream the slide area. To our knowledge, this registration of the impact on a river of the sediment release from a landslide is one of few of its kind in the world and unique for Sweden. Considering the low frequency of such events, the data from this landslide are highly useful for evaluating how appropriate the ADE is to describe the effects of landslides into surface water. The results yielded realistic predictions of the measured variation in suspended particle matter (SPM) concentration, after proper calibration. For the three individual slides it was estimated that a total of about 0.6% of the total landslide mass went into suspension and was transported downstream. This release corresponds to about 1 to 2% of the annual suspended sediment transport for that river stretch. The studied landslide partly involved an industrial area, and by applying the analytical solution to estimate the transport of metals in the sediments, it was found that landslides may release a significant amount of pollutants if large contaminated areas are involved. However, further studies are needed to develop more detailed descriptions of the transport processes. There is also a need to increase the knowledge on possible environmental consequences in the near and far field, in a short- and long-time perspective. In summary, the release of pollutants should not be neglected in landslide risk assessments.

scholarly journals Durability of Road and Bridge Concrete and Spray-Coating Waterproof Material

2021 ◽  
Vol 31 (4) ◽  
pp. 227-235
Author(s):  
Liang Wei
Keyword(s):  
Bridge Deck ◽  
Water Pressure ◽  
Spray Coating ◽  
Internal Force ◽  
Drain Pipe ◽  
The Road ◽  
Before And After ◽  
High Elongation ◽  
Research Gap ◽  
The Impact

Different from traditional waterproof methods for road and bridge concrete, the spray-coating waterproof material can effectively prevent rainwater and other corrosive liquids from entering the concrete structure, and it has a few functional advantages such as anti-carbonization, resistance to sulfate attack, and high elongation. Existing studies have discussed the impact of the microstructure of waterproof material on the structure of waterproof coating, the optimization of the mix ratios of waterproof material, and the influencing factors of the waterproof performance of waterproof material, etc., however, few researches have concerned about the mechanical properties of concrete after coated with the spray-coating waterproof material. Therefore, to fill in this research gap, this paper researched the durability of road and bridge concrete and the spray-coating waterproof material. At first, it analyzed the bridge deck water pressure and the internal force of the drain pipe structure under multiple drainage methods, and calculated the water pressure at the gutter inlet, the stress, and the permeability coefficient of the waterproof coating. Then, this paper elaborated on the experimental methods for measuring the durability of the road and bridge before and after coated with the spray-coating waterproof material, and introduced the methods for testing the waterproof material and the concrete. At last, this paper gave the corresponding experimental results, the analysis, and the conclusion.

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

2017 ◽  
Vol 41 (2) ◽  
pp. 191-221 ◽  
Author(s):  
Jan Maes ◽  
Matthieu Kervyn ◽  
Astrid de Hontheim ◽  
Olivier Dewitte ◽  
Liesbet Jacobs ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Risk Reduction ◽  
Publication Output ◽  
Landslide Risk ◽  
Population Number ◽  
Tropical Countries ◽  
Risk Reduction Measures ◽  
Number Of Publications ◽  
The Tropics ◽  
Landslide Risk Reduction

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.

What Are the Emerging Challenges for Community-Based Landslide Risk Reduction in Developing Countries?

2014 ◽  
Vol 15 (2) ◽  
pp. 128-139 ◽  
Author(s):  
Malcolm G. Anderson ◽  
Elizabeth Holcombe ◽  
Niels Holm-Nielsen ◽  
Rossella Della Monica
Keyword(s):  
Developing Countries ◽  
Risk Reduction ◽  
Landslide Risk ◽  
Community Based ◽  
Landslide Risk Reduction
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