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All Journal Jurnal RISET Geologi dan Pertambangan Marine Research in Indonesia
Makoto Taniguchi
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Earth & Planetary Sciences

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SUBMARINE GROUNDWATER DISCHARGE MEASUREMENT ON THE SANDY UNCONFINED AQUIFER AT THE CARNAVAL BEACH, ANCOL (JAKARTA BAY) Bakti, Hendra; Lubis, Rachmat Fajar; Delinom, Robert M.; Taniguchi, Makoto
Marine Research in Indonesia Vol 41, No 2 (2016)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (710.942 KB) | DOI: 10.14203/mri.v41i2.110

Abstract

Submarine groundwater discharge (SGD) is defined as all direct discharge of subsurface fluids into coastal zone. Components of SGD consist of fresh submarine groundwater discharge and the recirculated saline seawater discharge. SGD could act as a pathway for the transport of anthropogenic contaminants and nutrients to coastal waters. Measurement SGD at Carnaval Beach, Ancol, Jakarta was focussed on unconfined groundwater system. The method of quantified used automatic seepage meter for measured of SGD and installed conductivity temperature depth. The average SGD rate was 0.21 mm/min on March 20-31, 2009 consist of 19.05% fresh water, 80.95% recirculated seawater. April 1-23, 2009, the average SGD rate was 0.81 ml/min which consisted of 16.04% fresh water, 83.96% recirculated seawater. SGD fluctuation was opposite with the tide. As a result, submarine groundwater discharge at Jakarta coastal area was defined and can be measured to quantify.
SUBMARINE GROUNDWATER DISCHARGE MEASUREMENT ON THE SANDY UNCONFINED AQUIFER AT THE CARNAVAL BEACH, ANCOL (JAKARTA BAY) Bakti, Hendra; Lubis, Rachmat Fajar; Delinom, Robert M.; Taniguchi, Makoto
Marine Research in Indonesia Vol 41 No 2 (2016)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (815.024 KB) | DOI: 10.14203/mri.v41i2.110

Abstract

Submarine groundwater discharge (SGD) is defined as all direct discharge of subsurface fluids into coastal zone. Components of SGD consist of fresh submarine groundwater discharge and the recirculated saline seawater discharge. SGD could act as a pathway for the transport of anthropogenic contaminants and nutrients to coastal waters. Measurement SGD at Carnaval Beach, Ancol, Jakarta was focussed on unconfined groundwater system. The method of quantified used automatic seepage meter for measured of SGD and installed conductivity temperature depth. The average SGD rate was 0.21 mm/min on March 20-31, 2009 consist of 19.05% fresh water, 80.95% recirculated seawater. April 1-23, 2009, the average SGD rate was 0.81 ml/min which consisted of 16.04% fresh water, 83.96% recirculated seawater. SGD fluctuation was opposite with the tide. As a result, submarine groundwater discharge at Jakarta coastal area was defined and can be measured to quantify.
TRANSPORT AND TRANSFORMATION OF CHEMICAL COMPONENTS IN THE GROUNDWATER FLOW SYSTEM OF JAKARTA METROPOLITAN AREA Mitsuyo Saito; Shin-ichi Onodera; Yu Umezawa; Takahiro Hosono; Yuta Shimizu; Robert M. Delinom; Rachmat Fajar Lubis; Makoto Taniguchi
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 21, No 1 (2011)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (778.004 KB) | DOI: 10.14203/risetgeotam2011.v21.41

Abstract

ABSTRACT The aim of this study is to examine the transport and transformation of chemical components within the groundwater flow in Jakarta area, and to evaluate the effects of accelerated urbanization on it. The collected data showed that the current hydraulic potential in the Jakarta metropolitan area is below sea level because of prior excess abstraction of groundwater. The distribution of Cl- and Mn2- concentration in groundwater suggests that the decline in hydraulic potential has caused the intrusion of seawater to shallow groundwater and the movement of shallow groundwater into deep groundwater. It implies an accumulation of contaminants in deep aquifers. On the other hands, the presentation of NO3--N in groundwater is suggested to be attenuated by the processes of denitrification and dilution in the coastal area.
GROUNDWATER CHARACTERISTICS IN JAKARTA AREA, INDONESIA Makoto Kagabu; Robert M. Delinom; Rachmat Fajar Lubis; Jun Shimada; Makoto Taniguchi
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 20, No 2 (2010)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1178.135 KB) | DOI: 10.14203/risetgeotam2010.v20.35

Abstract

ABSTRACT In the Jakarta area (Indonesia), excessive groundwater pumping due to the rapidly increasing population has caused groundwater-related problems such as brackish water contamination in coastal areas and land subsidence. In this study, we adopted multiple hydrogeochemical techniques to understand groundwater characteristic in the Jakarta area. Although almost all groundwater existing in the Jakarta basin is recharged at similar elevations, the water quality and apparent residence time demonstrates a clear difference between the shallow and deep aquifers. Due to the rapid decrease in the groundwater potential in urban areas, we found that the seawater intrusion in shallow aquifer and the shallow and deep groundwaters are mixing, a conclusion confirmed by major ions, Br−:Cl− ratios and chlorofluorocarbon (CFC)-12 analysis.
Co-Authors Hendra Bakti Jun Shimada Makoto Kagabu Mitsuyo Saito Rachmat Fajar Lubis Rachmat Fajar Lubis Robert M. Delinom Shin-ichi Onodera Takahiro Hosono Yu Umezawa Yuta Shimizu