Deepak Chamlagain
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View article: Active faulting in the upper plate of the Himalayas: Paleoseismic insights from the Western Nepal fault system
Active faulting in the upper plate of the Himalayas: Paleoseismic insights from the Western Nepal fault system Open
Understanding the role of upper-plate faults in obliquely convergent margins is essential for assessing regional strain distribution and seismic hazards. In the Himalayas, paleoseismic research has focused on the Main Frontal thrust as the…
View article: Dextral slip along the Western Nepal Fault System accommodates significant orogen-parallel shear
Dextral slip along the Western Nepal Fault System accommodates significant orogen-parallel shear Open
New mapping in northwestern Nepal documents geomorphic landforms that are truncated and offset by active faults along the Western Nepal Fault System (WNFS), a right-slip fault system that accommodates orogen-parallel strain in the West Nep…
View article: Spatial analysis of causative factors for landslide susceptibility mapping in parts of Makwanpur District, central Nepal
Spatial analysis of causative factors for landslide susceptibility mapping in parts of Makwanpur District, central Nepal Open
Landslides pose a persistent and severe risk, frequently resulting in substantial harm to both people and infrastructures in Nepal. Understanding the underlying cause-and-effect dynamics of these events is crucial for effective mitigation …
View article: Quantifying surface process dynamics during extreme events from storm characteristics and landslide inventories
Quantifying surface process dynamics during extreme events from storm characteristics and landslide inventories Open
Extreme precipitation events drive landsliding in many regions across the globe and are an important part of the erosional cycle and related hazards. The intensity and frequency of extreme events are likely increasing due to rising global …
View article: One Dimensional Ground Response analysis in Patan: Implications to Damage Pattern due to the 2015 Mw 7.8 Gorkha Earthquake
One Dimensional Ground Response analysis in Patan: Implications to Damage Pattern due to the 2015 Mw 7.8 Gorkha Earthquake Open
The 2015 Mw 7.8 Gorkha earthquake caused extensive damages in Kathmandu Valley located about 78 km SE from the epicenter. The damage patterns in the city clearly indicated the subsurface geology of the city had strongly modified the ground…
View article: The 2021 Melamchi Flood: A massive erosional cascade in the Himalayan Mountains of central Nepal
The 2021 Melamchi Flood: A massive erosional cascade in the Himalayan Mountains of central Nepal Open
Large, sediment-laden floods in mountainous terrain can have disastrous consequences and play important roles in landscape evolution. These events often unfold as a series of interconnected processes, but understanding of such “hazard casc…
View article: Effect of Declustering Algorithm in Probabilistic Seismic Hazard Analysis for Kathmandu Valley
Effect of Declustering Algorithm in Probabilistic Seismic Hazard Analysis for Kathmandu Valley Open
An earthquake is a random event with uncertainty on time of occurrence, size of events, and location of rupture. So earthquake phenomenon is a model based on Poisson’s distribution. Thus, all the dependent event like foreshock and aftersho…
View article: Near‐Surface Geomechanical Properties and Weathering Characteristics Across a Tectonic and Climatic Gradient in the Central Nepal Himalaya
Near‐Surface Geomechanical Properties and Weathering Characteristics Across a Tectonic and Climatic Gradient in the Central Nepal Himalaya Open
Shallow bedrock strength controls both landslide hazard and the rate and form of erosion, yet regional patterns in near‐surface mechanical properties are rarely known quantitatively due to the challenge in collecting in situ measurements. …
View article: Geometry, kinematics, and magnitude of extension across the Thakkhola Graben, Central Nepal Himalaya
Geometry, kinematics, and magnitude of extension across the Thakkhola Graben, Central Nepal Himalaya Open
The Thakkhola Graben has been a region of geologic inquiry for many decades. Although it is widely viewed to be in a class of structures that are important in accommodating the three-dimensional strain within the Himalayan thrust wedge, we…
View article: Quality assessment and status of spring water in Helambu area, Sindhupalchok district, central Nepal
Quality assessment and status of spring water in Helambu area, Sindhupalchok district, central Nepal Open
The quality of spring water in the Higher Himalaya of Helambu area, Sindhupalchok district, Central Nepal was carried out. A total of fifty seven springs were surveyed to study different physical and chemical parameters, i.e. electric cond…
View article: Contribution of Fault Geometry on Probabilistic Seismic Hazard Assessment in Intermontane Basin: An example from Kathmandu Valley
Contribution of Fault Geometry on Probabilistic Seismic Hazard Assessment in Intermontane Basin: An example from Kathmandu Valley Open
The intermontane basins of the Himalaya are prone to damaging earthquakes as they are located roughly 10-15 km above the Main Himalayan Thrust (MHT), a major seismogenic thrust fault in the Himalaya. After the Mw 7.8 2015 Gorkha earthquake…
View article: NBC105: 2019 Seismic design of buildings in Nepal: New provisions in the code
NBC105: 2019 Seismic design of buildings in Nepal: New provisions in the code Open
The NBC 105: 2019 Seismic Design of Buildings in Nepal is the revised version of the original code for seismic design
\nfirst published in 1994. The code has never been reviewed and updated since then till the moment. Recognizing the
\nd…
View article: Probabilistic seismic hazard assessment of Nepal for revision of national building code NBC105
Probabilistic seismic hazard assessment of Nepal for revision of national building code NBC105 Open
Being located in seismically active Himalayan mountain belt, Nepal has been the locus of many devastating
\nearthquakes. The Mw 8.4 Bihar-Nepal earthquake of 1934 AD was the biggest earthquake disaster in Nepal that had
\nhighlighted the n…
View article: New Observations Disagree With Previous Interpretations of Surface Rupture Along the Himalayan Frontal Thrust During the Great 1934 Bihar‐Nepal Earthquake
New Observations Disagree With Previous Interpretations of Surface Rupture Along the Himalayan Frontal Thrust During the Great 1934 Bihar‐Nepal Earthquake Open
Reinvestigation reveals observations that do not support prior claims that the great Mw 8.4 Bihar‐Nepal earthquake produced surface rupture along the Himalayan Frontal Thrust of Nepal. While it may be viewed as reasonable to suggest that t…
View article: Erosional unroofing of Himalaya in far western Nepal: a detrital zircon U-Pb geochronology and petrography study
Erosional unroofing of Himalaya in far western Nepal: a detrital zircon U-Pb geochronology and petrography study Open
Since the collision between the Indian and Asian plates, several peripheral foreland basin were formed, and started to accumulate the sediments from the hinterland Himalayan orogeny. The sediments deposited at the northern tip of the Great…
View article: The size, distribution, and mobility of landslides caused by the 2015 Mw7.8 Gorkha earthquake, Nepal
The size, distribution, and mobility of landslides caused by the 2015 Mw7.8 Gorkha earthquake, Nepal Open
Coseismic landslides pose immediate and prolonged hazards to mountainous communities, and provide a rare opportunity to study the effect of large earthquakes on erosion and sediment budgets. By mapping landslides using high-resolution sate…
View article: Geomorphic features of active faults around the Kathmandu Valley, Nepal, and no evidence of surface rupture associated with the 2015 Gorkha earthquake along the faults
Geomorphic features of active faults around the Kathmandu Valley, Nepal, and no evidence of surface rupture associated with the 2015 Gorkha earthquake along the faults Open
The M7.8 April 25, 2015, Gorkha earthquake in Nepal was produced by a slip on the low-angle Main Himalayan Thrust, a décollement below the Himalaya that emerges at the surface in the south as the Himalayan Frontal Thrust (HFT). The analysi…