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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 5 Documents
 1 
Search results for , issue "Vol 4 No 1, June (2002)" : 5 Documents clear
INFLUENCE FACTORS ON THE LABORATORY TESTING OF GEOTEXTILES UNDER CONTROLLED ENVIRONMENT D. T. Bergado; S. Youwai; J. Maneecharoen
Lowland Technology International Vol 4 No 1, June (2002)
Publisher : International Association of Lowland Technology

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Abstract

In order to investigate the influence factors affecting index and engineering properties of geotextiles under controlled environtments, different tests were conducted using both heat-bonded nonwoven and needle-punched nonwoven geotextiles, namely: apparent opening size (AOS), wide-width tensile strength, premittivity, transmissivity, and puncture resistance. The effect of humidity on the pore size og the samples was also investigated. To sheck whether the clamping system has an effect on the strength of geotextiles, over 24o tests were conduted. The presence of air bubbles in water and its effect on the permittivity and transmissivity of geotextiles were also verified. Also investigated were the effects of higher strain rate and displacement rate on the tensile strength and puncture resistancem respectively. The results indicate that decreasing humidity slightly increased the AOS; higher strain rate and the use of hydraulic clamp increased the wide-width tensile strength; using de-aired water largely improved the permittivity and transmissivity; and increasing the strain rate decreased the puncture resistance. The effects of humidity and oxygen content were more pronounced and obvious in the case of needle-punched geotextile compared to heat-bounded nonwoven geotextile.
AUTOMATION OF THE RIJNLAND STORAGE BASIN, THE NETHERLANDS W. Schuurmans; P. E. R. M van Leeuwen; F. E. van Kruiningen
Lowland Technology International Vol 4 No 1, June (2002)
Publisher : International Association of Lowland Technology

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Abstract

The project “Automation of the storage Basin Rijnland” (ABR), was finalised at the beginning of the year 2000, that is three year later than originally planned. The project has resulted in an automatic control system for four drainage pumping stations (total capacity 150 m³/s) and an intake structure. The system can be operated with or without the intervention of a water manager. The original design of the system however, appeared not to function in practice. The system is currently running according to expectation, but its design has been adjusted drastically.
BEHAVIOR OF THEORETICAL CURVE NUMBERS WITH RESPECT TO SOIL AND RAINFALL PROPERTIES T. Y. Gan
Lowland Technology International Vol 4 No 1, June (2002)
Publisher : International Association of Lowland Technology

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Abstract

A dimensional analysis fails to obtain a universal, dimensionless relationshop between the maximum retention potential (S) of the Soil Conservation Service (SCS), runoff curve numbers (CN), and saturated hydraulic conductivity Ks, sorptivity, rainfall parameters, surface runoff, and soil moisture. Next, both S and the theoretical CN (CNT) were calibrated based on the numerical solutions of Richard’s equation applied to homogeneous soil columns. Result show that S and CNT are directly related to soil but inversely related to rainfall properties. As a temporally-lumped model, CN generally estimated lower cumulative infiltration than that of Richard’s equation; and in practice, the CN method may perform poorly if (1) Antecedent Moisture Conditions (AMC) is low, (2) the initial rainfall is much higher than Ks which leads to Horton overland florw, or (3) the rain pulses after the initial abstraction is satisfied are small. Before applications, adjustment of CNT with respect to the standart CN of fallow/idle land to reflect the effect of landuse, land treatment, and hydrologic conditions are recomended.
DEVELOPMENT AND HUMAN SETTLEMENT IN SAGA AND SHIROISHI PLAINS BY RECLAMATION M. R. Madhav; N. Miura; T. Igarashi
Lowland Technology International Vol 4 No 1, June (2002)
Publisher : International Association of Lowland Technology

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Abstract

The paper describes a case study of development of a very unique region in Japan, consisting of the Ariake bay and the Saga plain, which is subjected to about 6 m of tidal fluctuations and had been reclaimed from the sea over a period of centuries. The sequences of land development, reclamations, developments of water systems, dwellings, etc. are traced. The distinct characteristics of hydrology, irrigation and water management and urban drainage are described. Lastly, the serious problem of subsidence due to excessive pumping of ground water mostly for irrigation but also for industrial and domestic use is high-lighted. The human settlements in this region have evolved along unique patterns of design especially of the water systems and the houses in spite of being subjected to construction on very soft soil, being buffeted by typhoons and subsidence.
AN OBSERVATIONAL PREDCTION OF LAND SUBSIDENCE FOR A GIS-AIDED MONITORING SYSTEM OF GROUNDWATER LEVEL S. Murakami; K. Yasuhara; N. Mochizuki
Lowland Technology International Vol 4 No 1, June (2002)
Publisher : International Association of Lowland Technology

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Abstract

A simplified method for observational prediction of land subsidence based on settlement versus time records being previously observed at locations of the objective area was proposed in the present paper for use of the geographical information system (GIS). However, no consideration of ground water level (GWL) variations was taken into proposal of the method. The present paper, however, attempts to realize use of this time series analysis. Settlement variations over time predicted using the proposed two methods available for cases with and without consideration of GWL fluctuation were compared with those observed at locations in the objective area. In comparison with a method which ignores GWL fluctuation, better agreement was recognized between predicted and measured settlement versus relations. In particular, it was found that the proposed method succeeds in predicting settlemet acceleration over time during water shortage periods. Results predicted using the proposed method are displayed as a hazard map using the GIS. Based on the GIS application map, a possible monitoring system is presented for groundwater usage optimization.

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