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Atika Lubis
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STUDY OF RAINFALL AND RIVER DEBIT INTERACTION USING RATIONAL METHOD TO DETERMINE INTRUSION OF SEA WATER IN THE JAKARTA BAY AREA Lubis, Atika; Permadhi, Yan F; Haryanto, Eko
Jurnal Hidrosfir Indonesia Vol 5, No 3 (2010)
Publisher : Jurnal Hidrosfir Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (590.994 KB)

Abstract

The Ciliwung River that flow through Jakarta Province is one of important factor for the city. The deficiently water management in Jakarta caused water supply crisis within the area. The unsufficient water supply for Jakarta is causing groundwater pumping by the local people to comply their needs of water. Thus generated saline water intrusion from the Ciliwung’s downstream to the upstream through to the people’s settelement.The objective of this research is to find how far the sea water intrusion at Jakarta Bay by analyzing the interaction between rainfall with the Ciliwung River’s debit. Jakarta’s land cover is dominated by watertight materials such as concrete and asphalt induced runoff greater than infiltration. The current land cover caused the groundwater contaminated by sea water intrusion. The hypothesis is based on the groundwater calculation for Ciliwung’s River Basin. It showed the average ofbaseflow for the the Ciliwung’s River Basin range between 550 – 680 mm per year. The baseflow range shows that water absorbed by the ground is lesser than the rainfall at Ciliwung’s RiverBasin that ranged between 2000 – 2500 mm per year.Afterwards, using ten years of climate data and debit data from Katulampa Station (the Upstream of Sungai Ciliwung) and also using data from the Angke Estuary and the Ancol Estuary (Lower Ciliwung River) acquired the maximum sea water intrusion in Ciliwung River on May 6, 2005. The intrusion reaches is ranged between 14 – 20 kms measured from the downstream of Angke Estuary. While the intrusion at the Ancol Estuary ranged from 18 – 22 kms.
STUDY OF RAINFALL AND RIVER DEBIT INTERACTION USING RATIONAL METHOD TO DETERMINE INTRUSION OF SEA WATER IN THE JAKARTA BAY AREA Lubis, Atika; Permadhi, Yan F; Haryanto, Eko
Jurnal Hidrosfir Indonesia Vol 5, No 3 (2010)
Publisher : Jurnal Hidrosfir Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (590.994 KB)

Abstract

The Ciliwung River that flow through Jakarta Province is one of important factor for the city. The deficiently water management in Jakarta caused water supply crisis within the area. The unsufficient water supply for Jakarta is causing groundwater pumping by the local people to comply their needs of water. Thus generated saline water intrusion from the Ciliwung s downstream to the upstream through to the people s settelement.The objective of this research is to find how far the sea water intrusion at Jakarta Bay by analyzing the interaction between rainfall with the Ciliwung River s debit. Jakarta s land cover is dominated by watertight materials such as concrete and asphalt induced runoff greater than infiltration. The current land cover caused the groundwater contaminated by sea water intrusion. The hypothesis is based on the groundwater calculation for Ciliwung s River Basin. It showed the average ofbaseflow for the the Ciliwung s River Basin range between 550 680 mm per year. The baseflow range shows that water absorbed by the ground is lesser than the rainfall at Ciliwung s RiverBasin that ranged between 2000 2500 mm per year.Afterwards, using ten years of climate data and debit data from Katulampa Station (the Upstream of Sungai Ciliwung) and also using data from the Angke Estuary and the Ancol Estuary (Lower Ciliwung River) acquired the maximum sea water intrusion in Ciliwung River on May 6, 2005. The intrusion reaches is ranged between 14 20 kms measured from the downstream of Angke Estuary. While the intrusion at the Ancol Estuary ranged from 18 22 kms.
CONDITIONS OF MARITIME METEOROLOGY AND OCEANOGRAPHY IN THE VICINITY OF KOTOK ISLAND, SERIBU ISLANDS: APRIL 2011 Atika Lubis; Mira Yosi
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 4 No. 1 (2012): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (580.175 KB) | DOI: 10.29244/jitkt.v4i1.7803

Abstract

Meteorological data measurement by an Automatic Weather Station (AWS) were carried out at the pier of Kotok Island for East Monsoon period on April 2011 to obtain the changes phenomenon of maritime meteorological parameter and their correlation with the changes of oceanographic condition in shallow waters area and its surrounding. The measurement consists of surface wind parameter, air temperature, humidity, air pressure, and oceanographic data observations such as batimetry, tide, sea current, sea surface temperature, and salinity distributions. Result of maritime meteorological assessment obtained from previous reports (1980, 1998, and 2001) showed that the changes of the maximum air temperature were relatively significant. Furthermore, the air pressure data at the sea surface increased approximately 1.3 mBar. Nevertheless, other meteorological data seemed to be less significant in changes, but indicated a strong correlation with the pattern of tidal current and propagated waves to the shoreline. The changes of oceanographic parameter in the shallow water area were triggered the sedimentation processes, so that the coral reef growth might be decreased.Keywords: Maritime meteorology, oceanographic parameter, flat coral reef
Co-Authors Eko Haryanto Mira Yosi Yan F Permadhi