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 9 Documents
 1 
Search results for , issue "Vol 9 No 2, Dec (2007)" : 9 Documents clear
LOWLAND TECHNOLOGY INTERNATIONAL SPECIAL ISSUE – FOREWORD – H. Araki; S. Hayashi
Lowland Technology International Vol 9 No 2, Dec (2007)
Publisher : International Association of Lowland Technology

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

Abstract

Lowlands imply regions having low elevation, which are particularly susceptible to climatic, sea water level and environmental changes. For example, global warming, which appears to be causing a rise in sea level, must ultimately affect the safety of coastal dikes and other coastal infrastructures, as well as threaten the water and ecological systems in lowland areas. Lowland regions are also particularly vulnerable to natural disasters. In 2004, several large earthquakes and Tsunami in the Asian region caused major damage in lowland areas. The importance of exploration of problems in lowlands has been recognized by researchers, planners, engineers and administrators all over the world.
ANALYSIS ON GROUNDWATER WITHDRAWAL AND LAND SUBSIDENCE IN SHANGHAI Y.-S. Xu; S.-L. Shen; S. Hayashi; Z.-Y. Cai
Lowland Technology International Vol 9 No 2, Dec (2007)
Publisher : International Association of Lowland Technology

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

Abstract

Large-scaled land subsidence due to withdrawal of groundwater in Shanghai was observed. A method based on 3D-groundwater flow model is presented at first to calculate land subsidence in this paper. The model considers the aquitard-aquifer condition of Shanghai soft ground. Based on the proposed groundwater flow model combined with the compressibility of soil layer, subsidence is calculated through unifying in a one model condition. The anisotropic characteristics of soil layer are also considered in the model. The land subsidence, groundwater flow vector, and groundwater drawdown were analyzed using the proposed method. Through comparing between the measured value and calculated value, it indicates that the model simulated the measurement value well. Groundwater flow from west to east at the beginning stage and it flows from east to west after the long-term groundwater withdrawal. Groundwater level is depressed along with groundwater withdrawal.
ASSESSMENT OF ARTIFICIAL ENVIRONMENT FOR REPRODUCTION OF FOREST GREEN TREEFROG ALONG NIKKO-UTSUNOMIYA ROAD USING HABITAT EVALUATION PROCEDURE H. Ito; A. Fukuda
Lowland Technology International Vol 9 No 2, Dec (2007)
Publisher : International Association of Lowland Technology

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

Abstract

This paper aimed to develop the SI (Suitability Index) models of Forest Green Treefrog and assess the reproduction and the environment created artificially along Nikko-Utsunomiya road using the models developed. The mitigation project was planned and carried out to create 4 artificial ponds for reproduction by the former Japan Highway Public Corporation near the roadside to protect Forest Green Treefrog since its reproduction environment was destructed by the road project. However, the mitigation project could not be evaluated quantitatively whether it was appropriate or not, because there was no environmental assessment method in Japan. Recently, in order to solve this problem, several organizations like the Ministry of Environment are trying to introduce the Habitat Evaluation Procedures (HEP). It can be applied to assess the quality and the value of the habitat for the target species by developing its SI models. Therefore, in this study, the SI models of Forest Green Treefrog were developed based on available information by reviewing existing studies, literatures, and interviewing the experts. Using developed SI models, the validity of HEP by utilizing the mitigation project along Nikko-Utsunomiya road was validated. Based on the results of the study, the applicability of HEP proved to be satisfactory.
FLOOD RISK IMPACT OF SPATIAL DEVELOPMENTS, CLIMATE CHANGE AND SUBSIDENCE: CASE STUDY IN THE NETHERLANDS O. A. C. Hoes
Lowland Technology International Vol 9 No 2, Dec (2007)
Publisher : International Association of Lowland Technology

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

Abstract

Polder areas are vulnerable for inundations by extreme precipitation, as runoff may temporarily exceed the limited discharge capacity of drainage canals and pumping stations. This type of flooding is not life threatening, but can cause considerable economic damage. Furthermore, it is likely that frequency and damage of this type of flood events will increase in the future. The research question addressed in this paper is whether there is any need to improve water systems with respect to climate change, subsidence and spatial developments. To answer this question the case of the Flevo polder was studied. It will be shown that the risk increase of spatial developments, subsidence and climatechange simultaneously is larger then the sum of the individual risk increase per category.
LOOKING INTO AN APPROPRIATE METHODOLOGY FOR THE EMBANKMENT DESIGN AND CONSTRUCTION ON SOFT SOILS S. Oztoprak; S. F. Cinicioglu
Lowland Technology International Vol 9 No 2, Dec (2007)
Publisher : International Association of Lowland Technology

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

Abstract

The difficulty of simulating real field behavior during design stage causes construction difficulties that could not be foreseen for the embankments on soft clays. Although observational method seems to be the only tool to overcome these problems, the conventional observational methods suffer from the time lags between parameter revision and next stage of construction. New methodologies are needed which provide direct links between measurements and adjustment of parameters. The Oztoprak & Cinicioglu method is a modern version of the observational method for embankments on soft clays. In this paper, the applications and outcomes of this method on the two embankments; Cubzac-les-Ponts and Stanstead Abbotts, were outlined and compared with the findings by the application of two FE softwares; the Sage Crisp and Plaxis. These comparisons should be interpreted as the comparison of real behavior and highly effective prediction tools. The results indicated the incomparable effectiveness of the field measurements based approach but this does not imply that prediction methods should be overlooked, instead their capacities should be enhanced by the information gained through real nature of field behavior.
MODELLING STRAIN-SOFTENING BEHAVIOUR OF CLAYEY SOILS J.-C. Chai; J. P. Carter; S. Hayashi
Lowland Technology International Vol 9 No 2, Dec (2007)
Publisher : International Association of Lowland Technology

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

Abstract

A method for modelling the strain-softening behaviour of clayey soils under undrained and/or partially drained conditions is proposed and applied to simulate the mechanical behaviour of undisturbed Ariake clay and limestabilized Ariake clay samples under undrained conditions. The proposed method is based on the Modified Cam clay (MCC) model. It is assumed that during the softening process, the strain increments can still be calculated by the MCC model, but the effective stress path is enforced to follow the projection of the critical state line (CSL) in a p’– q plot (i.e., q = M p’ where p’ is mean effective stress, q is deviator stress and M is the slope of the CSL in the p’– q plot). Therefore the method is not completely rigorous in the applied mechanics sense, rather it is a pragmatic approach. The proposed method has been incorporated into a finite element code and its performance was verified by simulating undrained triaxial compression tests. Subsequently, the method has been applied to simulate the mechanical behaviour of both natural and lime-stabilized Ariake clays. Comparing the simulated results with the test data indicates that the method simulated both the shear strain versus deviator stress curve and the effective stress path reasonably well. However, the results also showed that in the case of the lime-stabilized Ariake clay, the adoption of a high initial stiffness under lower confining stress should be considered. It is suggested that the proposed method can be used to analyze geotechnical problems involving strain-softening behaviour with reasonable accuracy.
NOVEL THERMO-PVD CONSOLIDATION TECHNIQUE FOR SOFT SOILS C. Pothiraksanon; D. T. Bergado; H. M. Abuel-Naga; S. Hayashi; Y. J. Du
Lowland Technology International Vol 9 No 2, Dec (2007)
Publisher : International Association of Lowland Technology

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

Abstract

Previous research efforts on investigating the thermo-hydro-mechanical behaviour of fine grained soils as well as recent extensive experiments conducted on soft Bangkok clay have demonstrated that saturated fine-grained soils subjected to temperature less than boiling point of water (100OC) undergo volumetric and shear strength changes depending on the stress history. These features encouraged employing the thermal load only, up to 90OC, or in combination with mechanical loading as ground improvement technique. This paper addressed the applicability of this technique through a series of large oedometer tests conducted on soft Bangkok clay. Heating was achieved using flexible wire heater attached to the PVD point or using separate line heat source. The clay has been subjected to either thermal load or thermo-mechanical load. The test results show that a combination of the thermal and mechanical load gives promising results and is a viable technique since it accelerates the rate of consolidation and increases the amount of total settlement. This behavior can be attributed to the increase in the soil hydraulic conductivity as the soil temperature increases. Therefore, raising the soil temperature during the preloading period can enhance the performance of the PVD, particularly, by reducing the drainage retardation effects due to the smear zone around PVD.
SEGREGATION OF MICROPHYTOBENTHIC CHLOROPHYLL-A FROM SUSPENDED PARTICLES DURING TIDAL CYCLE IN NANAURA MUDFLAT, ARIAKE SEA, JAPAN C.-H. Koh; J. S. Khim; H. Araki; H. Yamanishi; K. Koga
Lowland Technology International Vol 9 No 2, Dec (2007)
Publisher : International Association of Lowland Technology

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

Abstract

The fluxes of microphytobenthic chlorophyll a (Chl-a) and suspended particulate matter (SPM) in water column and their relationship against tidal current have been examined during 15-days of full spring-neap tidal periods in the upper intertidal flat of Nanaura, Saga, Ariake Sea, Japan. The flood-ebb and spring-neap tidal conditions influenced within-day and daily variability in the fluxes of Chl-a and SPM, in terms of tidal energy. The Chl-a flux decreased relatively at slower pace than corresponding SPM flux at stage of decelerating incoming tide, which indicated the segregation of Chl-a from SPM followed by the slower settlement at depositional period. This ‘decoupling’ trend was consistently observed during the high tidal energy period of spring, particularly during the lower wind period (0-1 m s-1), but this was no more prevalent during the low tidal energy of neap and/or higher wind period (3-5 m s-1).
THE STUDY ON THE DISTRIBUTION OF VOLUME IN TRADITIONAL VILLAGE BUILDINGS BY THE MIDDLE REACHES OF NANXIJIANG RIVER IN SOUTHEAST CHINA RURAL AREA S. T. Li; C. Fan; W. Jie
Lowland Technology International Vol 9 No 2, Dec (2007)
Publisher : International Association of Lowland Technology

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

Abstract

This article is a summary for our studies on the village’s volume in Nanxijiang River drainage area that is in the rural area of Wenzhou in Southeast China Zhejiang province. In this area, many old villages are in their saturation. During our studies, we have found that the volumes including density and plot ratio are distributed in a special way. After statistics, we find out a volume model to describe the villages’ volume distributions and we will use the model tosupport the further constructions in the area.

Page 1 of 1 | Total Record : 9

 1 

Filter by Year

2007 2007


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