Articles
Pola Arus di Perairan Teluk Hurun Lampung Selatan
Riyadi, Agung
Jurnal Hidrosfir Indonesia Vol 2, No 2 (2007)
Publisher : Jurnal Hidrosfir Indonesia
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We observed the current data in Hurun Bay, South Lampung Sumatra Hurun Bay is a small semi enclosed bay with areas up to 1.5 km2 and has four mouth river. Measuremet field around one year from Januari 2003 until Januari 2004. The two current sensor located at central of the bay and the sensor take a depth about four (4) and twelve (12) meter from surface.The continous current record indicated that the current in Hurun Bay relative small. The current velocity at June is higher and have a average value 3.98 cm/second at 4 meter and 3.94 cm/second at 12 meter from surface and commonly current velocity in bay under 50 cm/second. Keywords: pattern flow, teluk hurun, current velocity
Model Transpor Penyebaran Sampah di Teluk Jakarta
Setiawan, Agus;
Riyadi, Agung
Jurnal Hidrosfir Indonesia Vol 2, No 3 (2007)
Publisher : Jurnal Hidrosfir Indonesia
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Spreading of wastes from 11 river mouths around the Jakarta Bay during the east and west monsoons is simulated in this study, making use of transport model. The data of wastes weight and concentration used in this study are obtained from “Marine and Jakarta Bay Wastes Prevention” pilot project conducted by the government of DKI Jakarta. In this simulation, it is assumed that the weight of daily outflow of wastes is constant and the composition of wastes is not taken into account.From the simulation results there are found that during the west monsoon, wastes in the Jakarta Bay mostly transported eastward, spread until 3 km and accumulated in the eastern part of the Jakarta Bay. Wastes with concentration more than 10 kg/L spread out to the offshore until 1 km from the shore line or river mouth. On the other hand, the wastes mostly transported westward during the east monsoon. These wastes spread westward until 5 km and mix with the wastes from the river mouths which are located in the western part of the Jakarta Bay. The amount of wastes which are spread westward during the east monsoon is greater than the amount of wastes which are spread eastward during the west monsoon.Keywords: Jakarta Bay, wastes, transport model
PENERAPAN TERUMBU KARANG BUATAN (RUMPON) DI PERAIRAN KUTAI KARTANEGARA KALIMANTAN TIMUR
Riyadi, Agung
Jurnal Hidrosfir Indonesia Vol 5, No 2 (2010)
Publisher : Jurnal Hidrosfir Indonesia
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Artificial reef (rumpon) are tools in the form fish collecting objects or structures that are designed made from natural or artificial materials that are placed permanently in marine waters. Many oil rigde spread in coastal area. Majority of fisherman from Kutai Kartanegara catch a fish around oil ridge and very dangerous. The Application of artificial reef technology as coral reefs have been set at Kutai Kartanegera waters in 2009. Activities are particularly in assessment site selection survey for deployment the artificial reef depand the quality and depth water. Artificial reef made of concrete with a total 60 pieces and has a size of 2 x 2.5 meters. The results of physical and chemical analysis such as water temperature, depth, salinity, turbidity, based material and dissolved oxygen in the normal condition. The dominat of sediment in a sand bed is muddy and has a marine topography a slope, because there is still considerable influence of the Mahakam delta. There are six potential locations for mooring artificial reef at position UTM 1.555000/9975100; 2.555823/9978221;3.559711/9981510;4.562515/9986117;5.558448/9991855; 6.557506/9987513. Artificial reef placement depths ranging 15 - 25 meters.
KAJIAN KUALITAS AIR WADUK TIRTA SHINTA DI KOTABUMI LAMPUNG
Riyadi, Agung
Jurnal Hidrosfir Indonesia Vol 1, No 2 (2006)
Publisher : Jurnal Hidrosfir Indonesia
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Tirta Shinta reservoir located at Wonomarto, North Kotabumi Lampung. Fiveteen year ago, this reservoir only use for wet rice field irrigation and the depth until 19 meter, but now the depth average just only 6 meter, many activities in the upper land and a lot of sedimentation. This reservoir condition be apprehensive, beside for used by irrigation, cultivation fish (karamba jaring apung) and tourisme, 40% surface water reservoir covered by grass wild and than degradation for fish production. Water quality for the Tirta Shinta reservoir still under standard quality (baku mutu) for fish. Dissolved oxygen (DO) surface water around 5 ppm, but at the bottom decrease until 2 ppm. Bakteri Coli containt is very hight until 1600 MPN/100ml, may be caused by a lot of fish cultivation activities, waste water domestic around the reservoir and no flushing water in the reservoir. Zeng (Zn) more until 0.112 mg/liter exceed quality standard (baku mutu) that is 0.05 mg/l. Ph relative acid around 5.5 – 6 and Pb under 0.001 mg/l.
DISTRIBUSI SALINITAS ESTUARIA DELTA MAHAKAM PERAIRAN KUTAI KARTANEGARA
Riyadi, Agung
Jurnal Hidrosfir Indonesia Vol 1, No 3 (2006)
Publisher : Jurnal Hidrosfir Indonesia
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Many estuary have a different salinity distribution, influence for the differentlevel of tide, river discharge flow, velocity and current direction. Januari 2006 at Delta Mahakam, going to salinity measurement activity covered by four village closed to the sea, that is Kersik, Marang Kayu, Muara Jawa and Muara Kembang. Water deep at Delta Mahakam relatif shallow, around 0.5 – 9 meter. Every estuary founded 2 – 5 point measurement salinity from the surface water until bottom and found the different for the salinity distribution. Kersik region have a higher salinity until 30 psu, whereas at the Muara Kembang region salinity level only 12 psu with a distance from the coast line about 3 km. This location similar with the Muara Jawa region. Pattern circulation and stratification water estuary base for clasification, Marang Kayu region have a mix completelly or vertical homogeneous estuary, while a Kersik, Muara Kembang and Muara Jawa region have a moderat sratification estuary. This type is very common in Indonesia, fresh water flow throungh to the river very dominant at several estuary.
POLA ARUS DI PERAIRAN TELUK HURUN LAMPUNG SELATAN
Riyadi, Agung
Jurnal Hidrosfir Indonesia Vol 2, No 2 (2007)
Publisher : Jurnal Hidrosfir Indonesia
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We observed the current data in Hurun Bay, South Lampung Sumatra Hurun Bay is a small semi enclosed bay with areas up to 1.5 km2 and has four mouth river. Measuremet field around one year from Januari 2003 until Januari 2004. The two current sensor located at central of the bay and the sensor take a depth about four (4) and twelve (12) meter from surface.The continous current record indicated that the current in Hurun Bay relative small. The current velocity at June is higher and have a average value 3.98 cm/second at 4 meter and 3.94 cm/second at 12 meter from surface and commonly current velocity in bay under 50 cm/second. Keywords: pattern flow, teluk hurun, current velocity
MODEL TRANSPOR PENYEBARAN SAMPAH DI TELUK JAKARTA
Setiawan, Agus;
Riyadi, Agung
Jurnal Hidrosfir Indonesia Vol 2, No 3 (2007)
Publisher : Jurnal Hidrosfir Indonesia
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Spreading of wastes from 11 river mouths around the Jakarta Bay during the east and west monsoons is simulated in this study, making use of transport model. The data of wastes weight and concentration used in this study are obtained from ?Marine and Jakarta Bay Wastes Prevention? pilot project conducted by the government of DKI Jakarta. In this simulation, it is assumed that the weight of daily outflow of wastes is constant and the composition of wastes is not taken into account.From the simulation results there are found that during the west monsoon, wastes in the Jakarta Bay mostly transported eastward, spread until 3 km and accumulated in the eastern part of the Jakarta Bay. Wastes with concentration more than 10 kg/L spread out to the offshore until 1 km from the shore line or river mouth. On the other hand, the wastes mostly transported westward during the east monsoon. These wastes spread westward until 5 km and mix with the wastes from the river mouths which are located in the western part of the Jakarta Bay. The amount of wastes which are spread westward during the east monsoon is greater than the amount of wastes which are spread eastward during the west monsoon.Keywords: Jakarta Bay, wastes, transport model
PENERAPAN TERUMBU KARANG BUATAN (RUMPON) DI PERAIRAN KUTAI KARTANEGARA KALIMANTAN TIMUR
Riyadi, Agung
Jurnal Hidrosfir Indonesia Vol 5, No 2 (2010)
Publisher : Jurnal Hidrosfir Indonesia
Show Abstract
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Download Original
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Original Source
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Full PDF (1324.231 KB)
Artificial reef (rumpon) are tools in the form fish collecting objects or structures that are designed made from natural or artificial materials that are placed permanently in marine waters. Many oil rigde spread in coastal area. Majority of fisherman from Kutai Kartanegara catch a fish around oil ridge and very dangerous. The Application of artificial reef technology as coral reefs have been set at Kutai Kartanegera waters in 2009. Activities are particularly in assessment site selection survey for deployment the artificial reef depand the quality and depth water. Artificial reef made of concrete with a total 60 pieces and has a size of 2 x 2.5 meters. The results of physical and chemical analysis such as water temperature, depth, salinity, turbidity, based material and dissolved oxygen in the normal condition. The dominat of sediment in a sand bed is muddy and has a marine topography a slope, because there is still considerable influence of the Mahakam delta. There are six potential locations for mooring artificial reef at position UTM 1.555000/9975100; 2.555823/9978221;3.559711/9981510;4.562515/9986117;5.558448/9991855; 6.557506/9987513. Artificial reef placement depths ranging 15 - 25 meters.
KAJIAN KUALITAS AIR WADUK TIRTA SHINTA DI KOTABUMI LAMPUNG
Riyadi, Agung
Jurnal Hidrosfir Indonesia Vol 1, No 2 (2006)
Publisher : Jurnal Hidrosfir Indonesia
Show Abstract
|
Download Original
|
Original Source
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Check in Google Scholar
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Full PDF (83.863 KB)
Tirta Shinta reservoir located at Wonomarto, North Kotabumi Lampung. Fiveteen year ago, this reservoir only use for wet rice field irrigation and the depth until 19 meter, but now the depth average just only 6 meter, many activities in the upper land and a lot of sedimentation. This reservoir condition be apprehensive, beside for used by irrigation, cultivation fish (karamba jaring apung) and tourisme, 40% surface water reservoir covered by grass wild and than degradation for fish production. Water quality for the Tirta Shinta reservoir still under standard quality (baku mutu) for fish. Dissolved oxygen (DO) surface water around 5 ppm, but at the bottom decrease until 2 ppm. Bakteri Coli containt is very hight until 1600 MPN/100ml, may be caused by a lot of fish cultivation activities, waste water domestic around the reservoir and no flushing water in the reservoir. Zeng (Zn) more until 0.112 mg/liter exceed quality standard (baku mutu) that is 0.05 mg/l. Ph relative acid around 5.5 6 and Pb under 0.001 mg/l.
DISTRIBUSI SALINITAS ESTUARIA DELTA MAHAKAM PERAIRAN KUTAI KARTANEGARA
Riyadi, Agung
Jurnal Hidrosfir Indonesia Vol 1, No 3 (2006)
Publisher : Jurnal Hidrosfir Indonesia
Show Abstract
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Download Original
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Original Source
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Many estuary have a different salinity distribution, influence for the differentlevel of tide, river discharge flow, velocity and current direction. Januari 2006 at Delta Mahakam, going to salinity measurement activity covered by four village closed to the sea, that is Kersik, Marang Kayu, Muara Jawa and Muara Kembang. Water deep at Delta Mahakam relatif shallow, around 0.5 9 meter. Every estuary founded 2 5 point measurement salinity from the surface water until bottom and found the different for the salinity distribution. Kersik region have a higher salinity until 30 psu, whereas at the Muara Kembang region salinity level only 12 psu with a distance from the coast line about 3 km. This location similar with the Muara Jawa region. Pattern circulation and stratification water estuary base for clasification, Marang Kayu region have a mix completelly or vertical homogeneous estuary, while a Kersik, Muara Kembang and Muara Jawa region have a moderat sratification estuary. This type is very common in Indonesia, fresh water flow throungh to the river very dominant at several estuary.