Survey of Coastal Environment under Development Project

• Project/Area Number: 04041049
• Research Category: Grant-in-Aid for international Scientific Research
• Allocation Type: Single-year Grants
• Section: Field Research
• Research Institution: Yokohama National University
• Principal Investigator: SHIBAYAMA Tomoya Yokohama National University, Associate Professor, 工学部, 助教授 (40143391)
• Co-Investigator(Kenkyū-buntansha): OKAYASU Akio Yokohama National University, Assistant, 工学部, 助手 (20213994) ; SATO Shinji Yokohama National University, Associate Professor, 工学部, 助教授 (90170753) ; NGYEN Ngoc A ホチミン市工大, 講師 ; TRAN Minh Qu ホチミン市工大, 教授 ; SUTAT Weesak アジア工科大学, 助教授 ; SUPHAT Vongv アジア工科大学, 教授 ; 合田 良実 横浜国大, 工学部, 教授 (90205584)
• Project Period (FY): 1992 – 1993
• Project Status: Completed (Fiscal Year 1993)
• Budget Amount: ¥8,000,000 (Direct Cost: ¥8,000,000); Fiscal Year 1993: ¥3,000,000 (Direct Cost: ¥3,000,000); Fiscal Year 1992: ¥5,000,000 (Direct Cost: ¥5,000,000)
• Keywords: Coastal Development / Coastal Environment / Sustainable Development / 開発途上国

Research Abstract

In the project, the main theme was to clarify 'What is sustainable development in coastal region? '. In many examples, development projects are necessary and environmental problem sometimes comes to restriction condition for the planning of development projects. In the project, we noticed that the problems between development and environment change depending on situation of each country.
There are variety of development projects in coastal region. They are port construction, reclamation for industrial area, agriculture development, fishery port construction, resort facilities and disaster prevention such as flood control and storm surge protection. Upon the construction projects, there are several kinds of environmental impacts. They are beach erosion, water quality change including the generation of red tide or blue tide, and ecology change which are loss of mangrove forest or loss of shallow water area due to reclamation works.
From engineering aspect, it is very important to predict f uture environmental problem. It is necessary to collect data by for example field observations. We have variety of simulation methods and they can be divided into two categories, numerical experiments (computer simulation) and hydraulic experiments (Laboratory model test). We have long experiences for these two techniques. However, these methods are limited to short term prediction raging from days to years. If we follow the result of prediction by using these methods, we will have a number of "un-expected results" in long term prediction as we did in our history. In order to improve this point, it is very important to do case studies which have time ranges from 10 to 100 years. This type of analysis based on long time period is very useful to consider environmental impacts.
The other important view point is that the small scale development as well as large scale development is important since even small scale development works will result big environmental impacts. Here small scale project includes recreation facilities or fishery ports.
As a conclusion of the project, we confirmed that the exchange of ideas based on their own experiences will be very fruitful for coastal engineers to cope with environmental problems due to new development projects in coastal region. In Asian region, we have common problems in coastal area development.

Research Products

• [Publications] 柴山知也: "持続可能なアジアの沿岸開発" 国際開発研究. 2-2. 105-112 (1993)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] 柴山知也(編): "Coastal Processes in Asian Region" 横浜国大・工・土木工学教室, 174 (1992)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Tomoya Shibayama (Editor): Dept. of Civil Engineering, Yokohama National University. Coastal Processes in Asian Region, 174p. (1992)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] 柴山 知也: "持続可能なアジアの沿岸開発" 国際開発研究. 2-2. (1993)