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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis JURNAL TEKNOLOGI LINGKUNGAN Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Rekayasa Lingkungan

Arif Dwi Santoso

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Author-ID : 2810041

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Engineering Environmental Science Library & Information Science

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IDENTIFIKASI HYPOXIA DI TELUK HURUN LAMPUNG Arif Dwi Santoso
Jurnal Teknologi Lingkungan Vol. 6 No. 2 (2005): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

This study was carried out to describe the characteristics of hypoxia in the tropical coastal sea. The general oceanographic surveys were conducted two times in Hurun Bay, 5-7 February and 17-19 February, 2003. And also, a day-night survey (25 hours survey) and the continuous monitoring of water temperature, current and meteorology were carried out. The monitoringdata of water temperature indicated that the seasonal variation and the spatial in temperature in Hurun Bay were small. The difference in temperature between the surface and bottom water was less than 1.3 oC. The water temperature increased from February and the highest in April.It gradually decreased to late June and a sudden decrease occurred in the early July. The lowest temperature was observed in September and then it increased again. The seasonal variation in the thermal stratification was not happened. Instead of the weak thermal stratification, a sharp picnocline was formed around 20m in the dry season. The water below the picnoline was colder and more saline and contained less DO than the overlaying water. The cold water mass which has high salinity and lower DO was situated along bottom deeper than 20m on 17-19 July. The lowest DO in this water mass was 0.4 mg/l. Such a cold water mass appeared in early July and it propagated from offshore to the coast. The oxygen consumption rate of the water column was about 0.1 mgO2/L/hour in Hurun Bay. Comparing these oxygen consumption rates and the DO of water, if the oxygen supply was restricted, the water in Hurun Bay could become hypoxic easily.

PEMANTAUAN HIDROGRAFI DAN KUALITAS AIR DI TELUK HURUN LAMPUNG DAN TELUK JAKARTA Arif Dwi Santoso
Jurnal Teknologi Lingkungan Vol. 6 No. 3 (2005): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

The present study, which was performed in Hurun Bay Lampung and Jakarta Bay, Indonesia, aimed to present the similar method using digital device Chlorotec, type AAQ1183, Alec Electronics for describing the characteristics of tropical coastal hydrography and water quality. The reason of selecting these two locations was to obtain a representation of different dissolved oxygen, temperature and turbidity levels. Jakarta Bay receives large amounts of nutrient-enriched waters, Hurun bay Lampung has moderate or small level of nutrient inputs of organic-polluted waters. The advantage of this method is the observation of field study able to hold with simply and accurately.

KUALITAS NUTRIEN PERAIRAN TELUK HURUN, LAMPUNG Arif Dwi Santoso
Jurnal Teknologi Lingkungan Vol. 7 No. 2 (2006): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Some rivers that flow into Hurun Bay waters, agriculture, fishery andhuman settlement and floating cage and oysters faming could benegative impact to waters organisms. Waters fertility is one of somefactors that support the action of determining waters quality. Somenutrient chemistry parameters (anmonia, nitrite, nitrate and phosphate)were analyzed base on specific methods for the parameters. Thenutrient concentrations were variated, for the parameters respectively,ammonia between 4.38 – 23.91 μg/L, nitrite 0.24 – 6.34 μg/L, nitratebetween 1.11 – 7.81 μg/L, and phosphate between 2.17 – 5.75 μg/L.At that moment, the nutrients concentrations were still good for marinewaters category. The environment condition at waters surrounding(river flow, agriculture, human settlement and fishery industry) did notinfluenced to nutrient concentrations.

KANDUNGAN ZAT HARA FOSFAT PADA MUSIM BARAT DAN MUSIM TIMUR DI TELUK HURUN LAMPUNG Arif Dwi Santoso
Jurnal Teknologi Lingkungan Vol. 8 No. 3 (2007): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

The result of phosphate analysis in Hurun Bay Lampung described thatconcentration phosphate in the West season was greater than in the East season. In the February 2003, phosphate concentration was 9.51±1.54 ì g/L while in July 2003 around 6.32±3.8 ì g/L. The phosphate dissociation and phosphate run-off from land through river may increase phosphate concentration in West season. The other result shows that phosphate concentration in the surface was higher than in the bottom layer in the all season.

TEKNOLOGI KONSERVASI DAN REHABILITASI TERUMBU KARANG Arif Dwi Santoso
Jurnal Teknologi Lingkungan Vol. 9 No. 3 (2008): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Indonesia’s rich supplies of corals and reef fish are endangered by destructive fishing practices. Cyanide and blast fishing are widespread throughout the archipelago even in protected areas. Indonesian reefs are also subject to various pressures from inland activities. Forestation and other land-use changes have increasedsediment discharge onto reefs, and pollution from industrial effluents, sewage, and fertilizer compounds the problem. Cumulatively, these pressures appear to have significantly degraded Indonesia’s reefs over time. Unfortunately, Indonesia has only limited monitoring. Few reefs are regularly studied, making the assessment of condition and change for the country quite difficult. Currently, most monitoringmindicates clearly that reef condition is declining. This article showed the status, biology, and monitoring-rehabilitation method of coral reef in Indonesia.

Co-Authors Dwi Dian Novita Joko P. Susanto Rahmania A. Darmawan Tamrin, Tamrin Warji Warji

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