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All Journal Lowland Technology International
Koichiro Ohgushi
Saga University
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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VARIABILITY OF WATER TABLE ELEVATION AND FLOW RESPONSE OF TROPICAL PEATLAND CASE STUDY AT PULAU PADANG, RIAU PROVINCE OF INDONESIA Nilna Amal; Joko Sujono; Rachmad Jayadi; Koichiro Ohgushi
Lowland Technology International Vol 22 No 4 (2021): 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.v22i4.674

Abstract

Peatland is a type of soil characterized by high water content. Using peatlands for plantation is accompanied by the presence of a channel. It causes water table decreasing to a certain depth that will increase the risk of fire. This study aims to observe characteristics of water table level in order to reveal the peatlands hydrology transformation. The study is conducted in Pulau Padang, Riau Province of Indonesia, which is a drained peatland that has been developed for industrial crop cultivation. The land is managed by different two groups, which are maintained by the local community and by private companies. An analysis is carried out by using a balance of water budget in peatland. The results show that there are correlations between water management with the state of water table elevation, especially the presence of channels and their management. The decreases of water table in local community areas are higher than that in companies' land with variety in higher values. This phenomenon occurs because there are no canal blocks on the peatland, which is managed by the local community so that the rise and fall of the water surface occur naturally. Keywords: peatlands, water table depth, channelization, rainfall, direct runoff
Projected Climate Indices Impact on the Hydrological Process in the Bago River Basin, Myanmar Suwai Thin; Koichiro Ohgushi
Lowland Technology International Vol 24 No 3 (2023): 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.v24i3.1557

Abstract

Despite the impact of temperature and precipitation patterns on river flow is an emerging issue in hydrology, few studies have been concentrated on the correlation between the hydrological components and climate indices. This study mainly focuses on the projected extreme climate indices and the effects of climate change projections on the hydrological process in the Bago River Basin, Myanmar. It has been noted that the mean monthly maximum temperature values are expected to rise throughout the entire basin under the RCP 4.5 scenario. On the other hand, the annual total precipitation index is anticipated to increase. The findings imply that the groundwater and surface flow will eventually expand as a result of the effects of extreme precipitation indices. Subsequently, there will be a decrease in the lateral flow. Furthermore, it is observed that the effect of temperature indices will cause a significant impact on evapotranspiration. This paper highlights that the crucial part of the extreme climate indices that influence the regional hydrological processes of the Bago River Basin in the upcoming decades.
Co-Authors Joko Sujono Rachmad Jayadi Suwai Thin