| Project/Area Number |
07044165
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Joint Research |
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| Research Field |
水工水理学
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| Research Institution | Toyo University |
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Principal Investigator |
OGIHARA Kunihiro Toyo University, Faculty of Engineering, Professor, 工学部, 教授 (60058071)
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| Co-Investigator(Kenkyū-buntansha) |
ANGGRAHINI Institute of Technology Sepuluh Nopember, Faculty of civil engineering and city, Lecturer
ANWAR Nadjadji Institute of Technology Sepuluh Nopember, Faculty of civil engineering and city, Lecturer D
TANAKA Shuzou Toyo University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (40139043)
FUKUI Yoshitaka Toyo University, Faculty of Engineering, Professor, 工学部, 教授 (60058146)
HINI Anggar Institute of Technology Sepuluh Nopember, Lecturer
ANGGRAHINI スラバヤ工科大学 都市計画, 土木学部, 教授
NADJADJI Anw スラバヤ工科大学 都市計画, 土木学部, 講師
ANGGRAHINI スラバヤ工科大学, 都市計画・土木学部, 教授
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| Project Period (FY) |
1995 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1997: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1996: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1995: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | Two phase flow / Mixed water of salt and fresh / density of salt water / Salt pond / fishpond / diffusion of salt / pushed flow |
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| Research Abstract |
This project research has started by the fund of Toyo University under the memorandum between ITS and Toyo University. The research theme was selected under the discussion between the staffs in hydraulic laboratory members of ITS and Toyo University, that was the environmental problem in Lamong River. And the fields' observations in Lamong were started in 1991 and the salt intrusion in the river became the main interests on research works in this research groupe. From 1996, the gtant-in-aid of Monbusho could support this research works in funds and several fields' observation could be done. And the severla paper from the results under this can be sent to the International Congress of APD-IAHR from 1994 to 1996.
The several results from this research works are derived as follows :
1) The type of salt intrusion in Lamong River is the strongly mixed type, which is very different from the one of Japan. And its type is defined by the parameter, which is calculated from the ratio between the saltwater volume supplied by tide prism and the volume of fresh water supplied from upstream of Lamong River.
2) The phenomenon on the variation of water level in fishponds connected to Lamong River is depended on the water discharge in connecting channel between ponds and river. This becomes non-linear relation and the parameters determined on this phenomenon can be derived by the theoretical analysis.
3) The salt density in ponds is related to the supplied water from the river and the loss of water by evaporation and leakage from the banks and gate. This phenomenon is also analyzed theoretical as the non-linear response and its result can make to clear the facts, as the density in fishponds becomes large inner part of ponds.
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