Groundwater in Bekasi District, West Java, Indonesia
Dirks, F.J.H.; Rismianto, D.; de Wit, G.J. (1989). Groundwater in Bekasi District, West Java, Indonesia. Natuurwet. Tijdschr. 70(1-4): 47-55
In: Natuurwetenschappelijk Tijdschrift. L. Walschot/Natuur- en Geneeskundige Vennootschap: Gent. ISSN 0770-1748, more
Also appears in:De Breuck, W.; Walschot, L. (Ed.) (1989). Proceedings of the 10th Salt-Water Intrusion Meeting Ghent (Belgium), 16-20 May 1988. Natuurwetenschappelijk Tijdschrift, 70(1-4). Natuurwetenschappelijk Tijdschrift: Gent. 408 pp., more
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| Authors | | Top |
- Dirks, F.J.H.
- Rismianto, D.
- de Wit, G.J.
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| Abstract |
The project "Groundwater Resources Survey in West Java" aims to make an inventory of groundwater resources available for drinking-water supply. In two districts within the West Java Province detailed hydrogeological mapping was carried out to assess the availability of fresh groundwater. The groundwater system in the Bekasi district, situated east of Jakarta in the northern coastal plain on the island of Java and on the east side of the Jakarta artesian basin, appeared to be very complex. Salinization of wells and decline in artesian heads or well yields have caused wide public concern and consequently underlined the need for proper groundwater management. One of the objectives of the project was the production of a groundwater-potential map for this district. This paper describes the methods applied to comprehend the groundwater system. In the study a variety of existing data were used. With the interpretation of these data, in combination with the results of the field survey, a better understanding of the groundwater systems in the coastal plain was achieved. It appeared that in the northern coastal plain, groundwater is usually recovered from thin sandy layers or sheets of limited extent which are imbedded in clayey, fine grained sediments. Salinization of wells and the lowering of groundwater heads both occur on a local scale. The salinization process is mainly attributed to extruding connate sea water from the clayey layers. Lateral sea-water intrusion may be of importance only in a narrow belt near the fresh-/salt-water interface. In general, the regional ground-water system in this area is a complex of many small, local, isolated aquifers. A schematization into extensive water-bearing aquifers separated by semi-pervious layers does not hold. Only within a very limited range bore logs can be correlated. Natural recharge, widely assumed to originate from the nearby mountains, is limited to the southern part of the coastal plain. Therefore, groundwater mining and its adverse effects may become important items in future groundwater management. |
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