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Evi Aprianti
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International Association of Lowland Technology In Collaboration with Hasanuddin University and Saga University Address Faculty of Engineering, Center of Technology Building, 1st Floor Jalan Poros Malino km. 6, Bontomarannu, Gowa Indonesia Postal Code: 91711
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Lowland Technology International
Published by International Association of Lowland Technology
ISSN : 13449656     EISSN : 21878870     DOI : https://doi.org/10.0001/ialt_lti
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Transportation
The Lowland Technology International Journal presents activity and research developments in Geotechnical Engineering, Water Resources Engineering, Structural Engineering, Transportation Engineering, Urban Planning, Coastal Engineering, Disaster Prevention and Mitigation Engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 463 Documents
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Probabilistic Seismic Hazard Analysis on Dam Site for specific Hydraulic Structure P. Shrestha; P.M. Pradhan; S.P. Timalsina
Lowland Technology International Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co
Publisher : International Association of Lowland Technology

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Abstract

In this research, the probabilistic seismic hazard analysis has been carried out at Upper Seti hydropower, located at Damauli, Tanahu District; western part of Nepal. The earthquake magnitudes and epicenter list; earthquake catalog were collected from various sources and then the declustering of earthquake data was performed. The seismic source zone around the site within 300km radius has been taken reference for seismic source model. Similarly relationship between magnitude and frequency of earthquake has been developed to obtained Guttenberg and Richter ‘a’ and ‘b’ parameters. Adopting suitable attenuation relationship and obtaining different probability densities and the seismic hazard curve has been developed for the dam site area where hydraulic structure is to be located. Finally, various levels of Peak Horizontal Acceleration (PHA) are obtained for various return periods using hazard curve at the dam site.
Influence of Topographic Effect on Dynamic Behavior of Hill Slope Building N. Gajurel; S. Manandhar; M.R. Bhatt
Lowland Technology International Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co
Publisher : International Association of Lowland Technology

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Abstract

This research was driven by observations made during the April 2015 Gorkha Earthquake, in which buildings located on the cliffs and hillslopes suffered significant damage. The primary goal of this research is to study the impact of topography on the dynamic behavior of buildings located on the slopes of hills, which are popular residential sites spread across Nepal. The numerical simulation of topographic effect was done using Ground Response Analysis. 2D geological models were made, over which seismic simulation were done. The results are presented in the form of topographical amplification factor (TAF). The amplification factor calculated from ground response analysis were used in static and linear dynamic time history analysis of the buildings. The response of a two-storied structure is compared with and without considering the effect of topography. The outcome demonstrates that, owing to topographic impact, hill-slope structures built using contemporary seismic design codes are not sufficient to withstand the enhanced seismic forces.
Building a More Resilient Nepal-The Utilisation of the Resilience Scorecard for Kathmandu, Nepal following the Gorkha Earthquake of 2015 M.R.Z. Whitworth; A. Moore; M. Francis; S. Hubbard; S. Manandhar
Lowland Technology International Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co
Publisher : International Association of Lowland Technology

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Abstract

Following the Gorkha earthquake of 2015, the opportunity exists to utilise the Resilience Scorecard to assess the current level of preparedness of Kathmandu. This article will discuss the application of the UN Resilience Scorecard, with the assessment undertaken forming a baseline assessment addressing core infrastructure issues from the earthquake and evaluating core community functions. The assessment looks at initially 3 pillars of the Resilience Scorecard through 3 core components: 1. The disaster cycle: From preparedness through response recovery to developing risk scenarios. 2. The operational capacity of the financial, governmental and societal institutions. 3. The resilience of the society from urban to rural including infrastructure and natural buffers. This paper highlights the key findings of the assessment undertaken during field visits to Kathmandu Valley following the April 2015 earthquake. The research study has found that Kathmandu has a low disaster resilience score with preliminary findings highlighting the susceptibility of critical infrastructure (i.e. roads, schools, hospitals, power, water supply) to natural hazards.
Assessment of Recovery and Resilience Livelihoods after Earthquake in Gorkha District, Gandaki Province, Nepal N.B. Thapa
Lowland Technology International Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co
Publisher : International Association of Lowland Technology

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Abstract

The study aims to assess the recovery and resilient livelihoods in the earthquake affected population of Gorkha district. The participatory learning and action methods were adopted while conducted the field study. The large majority of the respondents (92 %) have rated happy with the program. The overall changes have found from 1.4 to 08, 4.25 to 8.25 and 0.66 to 5.3 mean score out of ten in shelter, WASH and livelihoods recovery components respectively during before and after situation mapping of earthquake affected survivors. This is considered as significant contribution of recovery and resilient livelihoods program to make a difference in the life of earthquake affected survivors in Gorkha district. There have been completed around 79.76 per cent private houses until the end of September 2019 in Gorkha district whereas only 45.24 per cent private houses have been reconstructed in the overall highly affected areas (14 districts) of Nepal. In the study areas, the participation of women in the humanitarian support process has increased particularly in decision-making process at households, community and Rural Municipality level. There has been increased women participation in development works and division of work between women and men. There has been increased demand by local representatives to increase linkage and coordination with municipalities from the very beginning.
Underline Causes and Damage Assessment of Landslide Hazards in Bangladesh: A Case of 2017 event in Rangamati District M.N. Islam; M.M. Islam
Lowland Technology International Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co
Publisher : International Association of Lowland Technology

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Abstract

Landslide hazard has become a burning issue for Bangladesh that is occurring about every year and causes physical, environmental, economic and social damage with a lot of death and causalities. In last 50 years Bangladesh has lost more than 600 people in landslide hazards. This death toll is increasing day by day as in 2007, 2008, 2010, 2012, 2017 it has lost 135, 43, 60, 115, 163 lives respectively. In June 2017 landslide hazards of Chittagong division have resulted in 160 deaths and 234 injured. Most of the damages occurred in Rangamati district in the last landslide event as it has detached for one month from other districts and lost 120 people that’s why Rangamati district has been selected as the study location. The present study attempts to identify the physical and human induced causes of landslide hazards and damage assessment. Through household survey including Participatory Rural Appraisal (PRA) and Focused Group Discussions (FGDs) found that rainfall, weak soil structure, earthquake are the physical causes and hill cutting, deforestation, wrong cultivation systems, leakage in water pipe, unplanned urbanization are the major causes of landslide. Landslide in Bangladesh also occurs in specific time from June to August month of the year
Fault induced problems in hydropower tunnels in Nepal: A case study B. Chhushyabaga; S. Karki; S.S. Khadka
Lowland Technology International Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co
Publisher : International Association of Lowland Technology

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Abstract

This study focuses on the fault induced problems in the hydropower tunnels in Lesser Himalaya Region of Nepal and its stability using Numerical analysis. The presence of fault in the rock mass increases the existing in-situ stress beyond its critical level and strength. Due to which squeezing, swelling in sheared, schistosed, deformed rock mass and spalling, rock bursts in intact, unjointed rock mass are frequently encountered. The existing methods of the stability analysis, estimation of tunnel support using rock mass classifications do not consider the effect of the fault. A detailed study using 2D numerical analysis is carried out using the geological data, rock mass and fault encountered in hydropower tunnel. A comparison is then made between the analysis result of the tunnel with and without the fault to actual tunnel of case study.
Design and Analysis of Squeezing Ground Hydropower Tunnel in the Himalaya through a Case Study S. Karki; B. Karki; B. Chhushyabaga; S.S. Khadka
Lowland Technology International Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co
Publisher : International Association of Lowland Technology

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Abstract

Nepal is a country with varying topography and steep fast flowing rivers, high head hydropower projects are preferred in the region. Currently, numerous hydropower tunnels are being constructed and many more have been proposed. The varying geology along with weak rock mass has created several stability problems like squeezing and support failures. Through a case study in the Lesser Himalayan Region, this paper focuses on the assessment and analysis of tunnel sections in squeezing ground through analytical and numerical modelling. The most commonly adopted Rock Mass Classification approach for estimation of tunnel support seems inadequate to address the problem associated with tunneling in the Himalayas. Therefore, the knowledge of rock mass strength and deformation behavior is required for the optimal design of tunnel support in such geological conditions. Finite element analysis is carried out for face stability of tunnel in very poor rock mass by improving the rock mass to predict the real behavior of squeezing ground. The results of the analysis show that along with the use of empirical and analytical approach, numerical analysis should be used from the preliminary stages of design and care should be taken while modelling very poor rock mass where the stability of rock ahead of tunnel face is essential.
Behavior of an embankment on soft deposit improved by column-link method J.C. Chai; J. Ni; M.D. Liu
Lowland Technology International Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co
Publisher : International Association of Lowland Technology

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Abstract

The behavior of a test embankment on soft deposit improved by column-link method in Saga, Japan, was investigated by three dimensional (3D) finite element analysis (FEA). In column-link method, the column-walls under the shoulders of an embankment are linked by geogrids or cables to restrict lateral movement of the walls and partially reduce the embankment settlement. A geogrid with a tensile strength of 36 kN/m and yielding strain of 12% was used and relatively large lateral displacement of about 0.18 m occurred. The results of FEA showed that the geogrid might yield. The results indicated that to effectively restrain lateral movement of the walls, geogrids with high tensile strength and stiffness, like steel cables were needed. With the conditions of the test embankment, using steel cables, the mobilized tensile force in the cable could reach more than 600 kN/m. Further, at the upper part of the column walls, high compression or tensile stresses could be developed with strong linking geogrids. Thus, reinforcing the column walls with steel bar or H-steel is required. The results from this study showed a properly designed column-link method could be an effective and economic soft ground improvement method.
Decadal Variation in the Land Use and Land Cover Pattern of Madi, Chitwan from 1989 to 2017 with Flood Hazard Mapping B. Adhikari; P. Pokhrel; Y. Pradhan; A. Ulak
Lowland Technology International Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co
Publisher : International Association of Lowland Technology

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Abstract

Land use and Land cover changes are accelerated through anthropogenic undertakings, inviting natural calamities such as floods and landslides more frequently. Madi, covering an area of about 219 km² and being a part of Chure range of Terai, is subject to rampant exploitation by human leading to major flood events in Madi (Reu Khola) almost every year. The present study deals with land cover dynamics, flood hazard assessment of Madi along with dynamics of Reu Khola from the year 1989 to 2017. GIS and RS were used to evaluate our objectives. Decadal LANDSAT images and ALOS PALSAR DEM were classified using Interactive Supervised Classification. Subsequently, each image was classified into five class viz. water bodies, forest, bare land, cultivated land and floodplain. Throughout the span of 28 years, the change in the land features of Madi can be considered quite humble compared to that of the urbanizing areas. The flood hazard map created using multicriteria decision analysis is one of a kind for that region showing how the geospatial techniques could be of great help in making developmental policies, identifying the areas prone to floods. The study of sinuosity of the banks of the Reu Khola showed significant meandering and winding of the river channel which, in the future, will help predict the nature and path of the flowing river.
Mountain View Corridor Protection Urban Design Hefei City Dashu Hill Area Xiaoxiao Zhang; Jianxiong Yang
Lowland Technology International Vol 22 No 3 (2020): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v22i3, Dec.733

Abstract

Dashu Hill is the only mountain in Hefei. The paper analyses the relevant methods of the protection of mountain view corridor and expatiates on the evolution of methods and ideas for the protection of the view corridor within all previous Dashu Hill area urban design. Based on the new problems and technical methods, the design has made some research innovation in the protection of mountain view corridor.

Page 39 of 47 | Total Record : 463

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