cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Evi Aprianti
Contact Email
eviaprianti93@yahoo.com
Phone
+6282387555381
Journal Mail Official
ialt_lti@unhas.ac.id
Editorial Address
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
Location
Unknown,
Unknown
INDONESIA
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
 22   23   24   25   26 
DEVELOPMENT OF PHYTOPLANKTON MODEL WITH APPLICATION TO SONGKHLA LAKE, THAILAND S. Suwanidcharoen; W. Liengcharernsit
Lowland Technology International Vol 14 No 2, Dec (2012)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In this study, mathematical models are developed for simulating phytoplankton and nutrients dispersions in a water body. Two-dimensional vertically average mass balance equations of salinity, nitrogen and phosphorus in various forms and phytoplankton nitrogen are used as governing equations. The finite element method with Galerkin’s weighted residual technique is used in model formulation. The developed models are applied to Songkhla Lake, which is one of the most important water resources in the south of Thailand, where algal bloom problem occurs in some months almost every year. Data on nutrient loadings from various sources in the watershed area are estimated based on the existing land use patterns, population density, livestock, aquaculture, and farming activities. Data on water depth and current velocities are obtained from a hydrodynamic model. The results from the model are illustrated to show distribution patterns of salinity, various forms of nitrogen and phosphorus, as well as phytoplankton nitrogen. The developed models can be used as a tool for assessing the effect of nutrient loading on algal bloom phenomena and are useful for water quality management planning of this lake and other water bodies.
THE STUDY OF URBANIZATION PATTERNS AND THEIR IMPACTS ON ROAD SAFETY P. Iamtrakul; K. Hokao
Lowland Technology International Vol 14 No 2, Dec (2012)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Recently, Bangkok and its vicinities have been growing and become megacity. One of the main affects of land use and transportation interaction is the enormous societal loss in term of road traffic casualties. It requires a tool for safety vision as a proactive and integral approach to coordinate transportation and land use planning decision. This study explores the impacts of urbanization pattern on road safety base on three main driving factors which are physical conditions, economic opportunities and demographic growth together with plans and policies. The results could be compared with the different deterioration of safety level base on an application of severity approach and demonstrated by spatial techniques of aerial photo and geographical information system. With this tool, it is enable for more coordination among different stakeholders for improving road safety situation on an influence of the negative effects of sprawling development while promote sustainable transportation.
CURRENT PRACTICE ON FOUNDATION DESIGN OF HIGH-RISE BUILDINGS IN BANGKOK, THAILAND K. Amornfa; N. Phienwej; P. Kitpayuck
Lowland Technology International Vol 14 No 2, Dec (2012)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Assessment was made on the current practice on foundation design of high-rise buildings in Bangkok, Thailand to explore rooms for improvement. An interview survey revealed that the current design practice was dominated by structural engineers. They commonly used the conventional method of analysis, namely the combined stress equation, as well as the plate on springs analysis. The finding from the survey study indicates the current design practice does not encourage an optimal design outcome in term of cost effectiveness. The second part of the study is to explore the benefit in adopting the piled raft foundation design concept. A comparative study on the results of the 3dimensional finite element (3D FEM) analysis and various analysis methods currently used. The results show that the plate on pile springs method which neglects pile-pile and raft-pile interaction give results significantly different from that of the 3D FEM. The 3D FEM shows that only about 70-80% of total building loads are carried by piles when raft is placed in the stiff clay layer. The number of piles in the piled raft foundation can be significantly reduced particularly if the true piled raft foundation concept is adopted, while the foundation settlement only increases slightly.
SOIL IMPROVEMENT OF SOFT GROUND AROUND PILE FOUNDATION IN EARTHQUAKE-RESISTANT DESIGN T. Ohsutka; G Aramaki; K. Koga
Lowland Technology International Vol 6 No 1, June (2004)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

When a pile foundation structure is design in soft ground with Japanese road bridge design spesifications, there are many cases in which the cross section, the amount of steel reinforcement, and the number of piles are decided according to the displacement limiting value. In such soft ground, it is possible to expect that displacement magnitude of the base structure is suppressed by improving the soft ground around the piles. This study clarified that there was a depression effect by improving the peripheral grounf of piles, for both the displacement of the base structure and the bending moment in piles. The calculation was carried out variously, by change of improvement depth and improvement width around the pile. Additionally, the effect of soil improvement for nonliniear response of the bridge pier was also examined. In a series of calculations, a two-dimensional finite element analysis program (FLUSH) often used in earthquake-resistant design was used.
SUNDARBAN MANGROVE FOREST OF THE LOWLAND OF SOUTHWESTERN BANGLADESH AND ITS HYDROGEO-ENVIRONMENTAL ASPECTS M. Q. Hassan; K. R. Chowdhury
Lowland Technology International Vol 6 No 1, June (2004)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The paper presents the Sundarban Mangrove Forest and its hydro-environmental aspects in particular. The Sundarban Forest is covered by numerous distributaries of the Ganges delta along the coastal belt of the Bay of Bengal of southwest lowland area. The lithological distribution of surface area is of Geological Quarternary Age.These are clay,mud, silt, medium to fine sand and small patches of shell fragments In the beach area. Brief investigation of channel/ stream / river waters which indicated that the pH values varied from 7.5 to 8.4 and the recorded electrical conductivity (EC) ranges from 7,920 to 19,400 us/cm, and others ionic concentrations are also found in higher condition. The Sundarban Mangrove Forest frequently become of severe cyclones, tidal fooding and storm surges. The present study can help in the future planning and development of the lowland area of the Sundarban Mangrove Forest.
DISCUSSION ON “GEOTECHNICAL HAZARDS IN BANGKOK – PRESENT & FUTURE”, BY S. SHIBUYA, S. B. TAMRAKAR AND W. MANAKUL, LOWLAND TECHNOLOGY INTERNATIONAL, 5(1), 95-104 A. S. Balasubramaniam; N. Phienwej; D. T. Bergado; Y. N. Oh
Lowland Technology International Vol 6 No 1, June (2004)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The writers read with great interest the contribution on “Geotechnical Hazard in Bangkok – Present Future”. The writers had a long time interest in the subsidence of Bangkok since 1973 (see Piancharoen and Chuamthaisong, 1976; Piancharoen and Isarangula, 1974; Rammarong, 1974) or so.
AUTHORS’ REPLY ON “GEOTECHNICAL HAZARDS IN BANGKOK – PRESENT AND FUTURE” DISCUSSION Shibuya, S.; Tamrakar, S. B.; Manakul, W.
Lowland Technology International Vol 6 No 1, June (2004)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The authors are very much delighted with informative discussion made by our ex-colleagues (and ex-teachers) at AIT. The paper aimed at drawing attention of many readers who may not be familiar with current and, possibly, future geo-hazards in Bangkok area, implying that the paper is a type of incomplete S-O-A report rather than original paper.
WATER QUALITY MONITORING OF THE ARIAKE SEA BY REMOTE SENSING AND UTILIZATION OF FIELD OBSERVATION K. Ohgushi; H. AR; T. Y. Gan
Lowland Technology International Vol 6 No 2, Dec (2004)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A remote sensing is one of the most powerful solution for estimating water quality in wide water bodies effectively. The earth observation stellites Landsat have been observing the land and ocean from space for a long time with consistent specification plus new additional technology. In this paper, a water quality in the Ariake Sea, Japan is estimated by using Landsat-TM nad ETM+ images with field observation. The models for water salinity and cholorophyll-a concentration are developed by regression analysis like the transparancy and water temperature models, and they are also validated by other observed data. In order to understand characteristic of water quality in the Ariake Sea. a continuous observation was also executed at a fixed observation tower in the bay for about five months. A GIS technique was also applied to consider spatial and seasonal characteristic of water environment of this bay.
MODIFIED HYPERBOLIC MODEL FOR CAPTURING UNDRAINED SHEAR BEHAVIOR S. Horpibulsuk; R. Rachan
Lowland Technology International Vol 6 No 2, Dec (2004)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The hyperbolic and modified hyperbolic models are proposed to predict the stress-strain response of the uncemented, naturally cemented and induced cemented clays under undrained shear so as to suggest the simple analysis and assessment. The hyperbolic responses of stress ratio and shear strain as well as of effective mean principal stress and shear strain are introduced to assess the undrained shear behavior of the uncemented and naturally cemented clay. The modified hyperbolic responses are employed for the induced cemented cays. These models consist of the parameters, which control the constitutive behavior of the uncemented, naturally cemented, and induced cemented clays in undrained situation. These parameters are easily determinable from standard triaxial tests. The predicted and laboratory responses are in good agreement.
AN ASSESSMENT ON SOIL DISTURBANCE OF BANGKOK CLAY SAMPLES IN RELATION WITH THE INTRINSIC COMPRESSION BEHAVIOR P. H. Giao; N. Phien-wej; H. Tanaka
Lowland Technology International Vol 6 No 2, Dec (2004)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Recent reseraches have again stirred up the soil disturbance issue and clearly indicated how significantly it could affect on soil characterization, empirical relationship between different soil parameters and, d=finally, design calculations. In this study, analyses of sample quality were carried out for a large amount of the samples taken from a coastal site near the Gulf of Thailand. The results of the study on intrinsic, compression suggested that Bangkok clay seems to be less cemented than some other clays known for being strictured like Pusan or Louseville clays. By putting this finding next to the fact that Bangkok clay has not a big thickness, one can consider that the soil disturbance of Bangkok clay would not be so critical. On the other hand, the analysis have indicated that samples collected by the procedure of wash boring and Shelby sampling tube as commonly practiced in Bangkok plain were clearly subjected to soil disturbance. Consequently, quality of Bangkok clay samples to be tested should not be taken for granted as it has been for decades, and more studies on disturbance of Bnagkok clay as well as an improvement in sampling procedure are therefore needed.

Page 24 of 47 | Total Record : 463

 22   23   24   25   26 

Filter by Year

1999 2024


Reset
Filter By Issues
All Issue Vol 24 No 4 (2024): Lowland Technology International Journal Vol 24 No 3 (2023): Lowland Technology International Journal Vol 24 No 2 (2022): Lowland Technology International Journal Vol 24 No 1 (2022): Lowland Technology International Journal Vol 23 No 4 (2022): Lowland Technology International Journal Vol 23 No 3 (2021): Lowland Technology International Journal Vol 23 No 2 (2021): Lowland Technology International Journal Vol 23 No 1 (2021): Lowland Technology International Journal Vol 22 No 4 (2021): Lowland Technology International Journal Vol 22 No 3 (2020): Lowland Technology International Journal Vol 22 No 2 (2020): Lowland Technology International Journal Vol 22 No 1 (2020): Lowland Technology International Journal - Special Issue on: Engineering Geology Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co Vol 21 No 3, Dec (2019) Vol 21 No 2, Sep (2019) Vol 21 No 1, June (2019) Vol 20 No 4, March (2019): Special Issue on: Green Technology for Sustainable Infrastructure Develop Vol 20 No 3, Dec (2018) Vol 20 No 2, Sep (2018) Vol 20 No 1, June (2018) Vol 19 No 4, March (2018) Vol 19 No 3, Dec (2017) Vol 19 No 2, Sep (2017) Vol 19 No 1, June (2017) Vol 18 No 4, March (2017) Vol 18 No 3, Dec (2016) Vol 18 No 2, Sep (2016) Vol 18 No 1, June (2016) Vol 17 No 4, March (2016) Vol 17 No 3, Dec (2015) Vol 17 No 2, Sep (2015) Vol 17 No 1, June (2015) Vol 16 No 2, Dec (2014) Vol 16 No 1, June (2014) Vol 15 No 2, Dec (2013) Vol 15 No 1, June (2013) Vol 14 No 2, Dec (2012) Vol 14 No 1, June (2012) Vol 13 No 2, Dec (2011) Vol 13 No 1, June (2011) Vol 12 No 1 (2010): Vol 12 No. 1, June (2010) Vol 12 No 2, Dec (2010) Vol 11 No 2, Dec (2009) Vol 11 No 1, June (2009) Vol 10 No 2, Dec (2008) Vol 10 No 1, June (2008) Vol 9 No 2, Dec (2007) Vol 9 No 1, June (2007) Vol 8 No 2, Dec (2006) Vol 8 No 1, June (2006) Vol 7 No 2, Dec (2005) Vol 7 No 1, June (2005) Vol 6 No 2, Dec (2004) Vol 6 No 1, June (2004) Vol 5 No 2, Dec (2003) Vol 5 No 1, June (2003) Vol 4 No 2, Dec (2002) Vol 4 No 1, June (2002) Vol 3 No 2, Dec (2001) Vol 3 No 1, June (2001) Vol 2 No 2, Dec (2000) Vol 2 No 1, June (2000) Vol 1 No 2, Dec (1999) Vol 1 No 1, June (1999) More Issue