Ranjan Kumar Dahal
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View article: Influence of temperature on the residual shear strength of landslide soil: role of the clay fraction
Influence of temperature on the residual shear strength of landslide soil: role of the clay fraction Open
The occurrence and fate of landslides are, among other factors, controlled by the shear strength of the materials involved and by how this strength changes during the landslide process. Temperature affects the strength of pure clays accord…
View article: Multi-Scale Rainfall Thresholds for Landslide Prediction: Advancing Early Warning Systems in Diverse Landscapes of Nepal
Multi-Scale Rainfall Thresholds for Landslide Prediction: Advancing Early Warning Systems in Diverse Landscapes of Nepal Open
In Nepal, efforts to establish landslide-triggering rainfall thresholds across multiple scales are well underway, aiming to enhance the effectiveness of landslide early warning systems (LEWS). These thresholds are being developed at region…
View article: Consequences of slope instability and existing practices of mitigation in hydropower projects of Nepal
Consequences of slope instability and existing practices of mitigation in hydropower projects of Nepal Open
Introduction Nepal has witnessed several instances of slope instability associated with Hydroelectric Projects in the recent decades. Despite this, slope instability tends to receive less attention compared to other hazards. Objectives The…
View article: Influence of temperature on the residual shear strength of landslide soil: role of the clay fraction
Influence of temperature on the residual shear strength of landslide soil: role of the clay fraction Open
The occurrence and fate of landslides are, among other factors, controlled by the shear strength of the materials involved and by how this strength changes during the landslide process. Temperature affects the strength of pure clays accord…
View article: Stakeholder perspectives on landslide triggers and impacts in five countries
Stakeholder perspectives on landslide triggers and impacts in five countries Open
Expert perspectives drive landslide mitigation and post-disaster policy planning. This study examines landslide risk perceptions among the stakeholders (government officials, academics, policy experts, local community representatives, and …
View article: Assessing Landslide Susceptibility in Indian Himalayas: Comparing Polygon and Point-Based Inventories with Modified Frequency Ratio Approach
Assessing Landslide Susceptibility in Indian Himalayas: Comparing Polygon and Point-Based Inventories with Modified Frequency Ratio Approach Open
This study examines the effects of using point and polygon-based landslide inventory on the process of mapping landslide susceptibility in the Northwestern Indian Himalayas. The modified frequency ratio method was utilized to generate the …
View article: Mapping Hazards in Nepal’s Melamchi River: Catchment to Enhance Kathmandu’s Water Security
Mapping Hazards in Nepal’s Melamchi River: Catchment to Enhance Kathmandu’s Water Security Open
This technical report assesses the string of events that triggered Nepal’s Melamchi River floods in 2021 and highlights threats to the catchment area that provides vital drinking water to Kathmandu’s fast-growing population. The report exp…
View article: Green Biocidal Nanotechnology Use for Urban Stone-Built Heritage—Case Study from Oradea, Romania
Green Biocidal Nanotechnology Use for Urban Stone-Built Heritage—Case Study from Oradea, Romania Open
Heritage buildings clad with natural rock endure over time destruction caused by weathering mechanisms, pollution from urban areas, biodeterioration due to organisms, microorganisms, and also the anthropic factor. On the surface of the lim…
View article: Slope stability issues of Bukula Landslide in Raghuganga Hydropower Project
Slope stability issues of Bukula Landslide in Raghuganga Hydropower Project Open
Slope stability concerns hold global significance among researchers, professionals, and academicians. Despite various research studies, geological and geotechnical investigations on landslides, there is still a lack of proper and comprehen…
View article: Microbial Air Quality in the Built Environment—Case Study of Darvas-La Roche Heritage Museum House, Oradea, Romania
Microbial Air Quality in the Built Environment—Case Study of Darvas-La Roche Heritage Museum House, Oradea, Romania Open
Problems in the degradation and biodegradation of cultural heritage objects exposed or stored in public buildings and museums and of construction materials are caused (between others) by the activity of microorganisms. Biodeterioration can…
View article: Physically based slope stability analysis: future scenarios due to changing surface temperature
Physically based slope stability analysis: future scenarios due to changing surface temperature Open
Temperature significantly affects the hydraulic and mechanical properties of geomaterials on a slope. However, results from the laboratory show the change in material behaviour depends on the slip rates and the type of minerals present. Ac…
View article: Landslide Susceptibility Assessment Using GIS-Based Weights-of-Evidence Model in the Khimti Khola Watershed, Eastern Nepal
Landslide Susceptibility Assessment Using GIS-Based Weights-of-Evidence Model in the Khimti Khola Watershed, Eastern Nepal Open
The Khimti Khola watershed of the Eastern Nepal experiences numerous landslides each year, pose a significant natural hazard that can cause property damage and fatalities. In mountainous areas like Nepal, an accurate evaluation of landslid…
View article: Rock mass characterization and support analysis of pressurized headrace tunnel of the Upper Balephi “A” Hydroelectric Project, Nepal
Rock mass characterization and support analysis of pressurized headrace tunnel of the Upper Balephi “A” Hydroelectric Project, Nepal Open
Detailed geological, engineering geological and geotechnical assessment are prerequisites for any design works in underground excavation. Due to complex geology in young Himalayan, it is mandatory. Any misjudgment in support design may res…
View article: Qualitative rock-fall hazard mapping around the Siddhababa area along the Siddhartha Highway in western Nepal
Qualitative rock-fall hazard mapping around the Siddhababa area along the Siddhartha Highway in western Nepal Open
The Butwal-Dobhan road section of the Siddhartha Highway is highly hazardous and problematic section due to rock-fall. In this road section, the Siwalik rocks are exposed that contains inter-bedding of hard and soft rocks. The differential…
View article: Pre-Earthquake Ionospheric Anomalies Associated with the 2015 Gorkha Earthquake of Nepal Detected by GPS-TEC Measurements
Pre-Earthquake Ionospheric Anomalies Associated with the 2015 Gorkha Earthquake of Nepal Detected by GPS-TEC Measurements Open
The present study analyses the variations in the ionospheric total electron content (TEC) prior to and during the 2015 Gorkha Earthquake in Nepal (Mw = 7.8) on 25 April 2015, utilising data from the widely distributed Global Positioning Sy…
View article: Deterministic and Probabilistic Analysis of Dasdhunga Soil Slope along Narayangarh-Mugling Road Section
Deterministic and Probabilistic Analysis of Dasdhunga Soil Slope along Narayangarh-Mugling Road Section Open
Instability of slopes is usually governed by a combination of intrinsic and extrinsic factors. The inherent variability of parameters make the problem probabilistic rather than a deterministic one. This research deals with evaluation of st…
View article: The impact of COVID-19 outbreak and perceptions of people towards household waste management chain in Nepal
The impact of COVID-19 outbreak and perceptions of people towards household waste management chain in Nepal Open
The spread of COVID-19 is posing significant challenges to the household (HH) waste management sectors putting waste personnel and concerned bodies under massive pressure. The chain of collection, segregation, recycling, and disposal of ho…
View article: Law Enforcement Agencies in Disaster Response in Nepal: Analyzing the Competency of the Nepal Police and the Armed Police Force
Law Enforcement Agencies in Disaster Response in Nepal: Analyzing the Competency of the Nepal Police and the Armed Police Force Open
Although Nepal Police and Armed Police Force are the key responding tools of disaster response in Nepal, their response competency does not suffice the need for effective response. Applying quantitative research methodology, this research …
View article: Disaster risk understanding of local people after the 2015 Gorkha Earthquake in Pokhara City, Nepal
Disaster risk understanding of local people after the 2015 Gorkha Earthquake in Pokhara City, Nepal Open
The unique geography and fragile geological condition have made Nepal more prone to various types of disasters. The 2015 Gorkha Earthquake had a serious effect on one-third of the population of Nepal. Disaster comes with both opportunities…
View article: Local level Disaster Response in Nepal: Investigating the Government Agencies
Local level Disaster Response in Nepal: Investigating the Government Agencies Open
Effect of local level disaster response is always questionable in Nepal. It is because the capacity of local responding bodies' i.e. local administration, elected representatives and security forces is deficit. Overlooking own role and res…
View article: Rockfall hazard in the Imja Glacial Lake, eastern Nepal
Rockfall hazard in the Imja Glacial Lake, eastern Nepal Open
In Nepal, rockfall related studies are rarely conducted and are limited to the landslide study along with few case studies on rockfall events. Rockfall problems in Nepal are more frequent in the Higher Himalayan region than Midland and Les…
View article: Impacts of Long-Term Flood-Induced Sedimentation on Agricultural Land: Case Study of the 2008 Koshi Flood in Eastern Nepal
Impacts of Long-Term Flood-Induced Sedimentation on Agricultural Land: Case Study of the 2008 Koshi Flood in Eastern Nepal Open
Flood of August 2008 in eastern lowlands of Nepal affected around 2.64 million people in India and Nepal, including 65,000 people and 700 ha fertile land in Nepal. It was estimated that 20% of land was still barren even in 2016 (eight year…
View article: Application of wavelet for seismic wave analysis in Kathmandu Valley after the 2015 Gorkha earthquake, Nepal
Application of wavelet for seismic wave analysis in Kathmandu Valley after the 2015 Gorkha earthquake, Nepal Open
In this paper, we estimate the seismogenic energy during the Nepal Earthquake (25 April 2015) and studied the ground motion time-frequency characteristics in Kathmandu valley. The idea to analyze time-frequency characteristic of seismogeni…
View article: Climate Change Induced Flood and Landslides and Farmer’s Adapatation Practices in Paddy Production: Evidence of Rural Hilly Nepal
Climate Change Induced Flood and Landslides and Farmer’s Adapatation Practices in Paddy Production: Evidence of Rural Hilly Nepal Open
Climate change is a buzzword in the world. Scientist has approved it as global warming with its projection of undesired and unpredicted frequent extreme events and their vulnerabilities not only at present but also at future. There is an a…
View article: Competency of the Infantry Troops of the Nepalese Army in Disaster Response
Competency of the Infantry Troops of the Nepalese Army in Disaster Response Open
Although the Nepalese Army’s regular infantry troops are the tools of disaster response their competency at times becomes questionable. Their disaster response’s soft skill knowledge, technical skill knowledge and preparedness activities a…
View article: Landslide hazard mapping in GIS
Landslide hazard mapping in GIS Open
Landslides are common geologic hazard occurring in all parts of the world predominantly in the rainy season. In recent years, landslide risk mapping has played an important role in developing land-use planning and it helps to minimize the …