| Title | Performance-based Seismic Design Method of Port Structures -Harbor Basin Hydrographic Survey Technique and Hydrographic Survey Standard Specification |
| Dept | Transportation Technology and Information Division |
| Year | 2004 |
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| Summary | Published in March 2004 IOT SERIAL No. 93-30-779, 204pp. Hydrographic data is fundamental in coastal and ocean engineering and research. The hydrographic standard and accuracy requirements vary according to the purpose of the jobs. Public Construction Commission of Executive Yuan, Taiwan, ROC, just announces major requirements for hydrographic survey. The hydrographic survey regulations for Harbor Authorities of Taiwan (HAT). They are facing a lot of difficult problems, including: international competition, rapid development of hydrographic survey equipments and technology. The hydrographic survey standards should be adjusted accordingly to reduce harbor navigation safety, caused by dredging and harbor engineering problems. Referring to the hydrographic survey standards from CPW, HAT, US. Army Corps of Engineers, IHO etc., this proposes a “Standards for harbor hydrographic survey (draft)” for dredging and harbor engineering works. IHO “Standards for Hydrographic Surveys version 4” (SP 44) was published in 1998. Countries worldwide began to renew their hydrographic survey standards for vessel navigation, dredging, and engineering related works since then. In Taiwan, the current engineering hydrographic survey standard was proposed in 1995-1996. Therefore, it is time to update this standard. The Harbor and Marine Technology Center, the Institute of Transportation of the Ministry Department of Transportation and Communications Taiwan, propose for a set of new hydrographic standards for harbor engineering and dredging purpose to serve as standard survey, QA/QC procedures, and accuracy. To decrease dispute between CPW and dredging company differences of calculated dredging volume. This study evaluates several well-known international commercial dredging volume calculation software with real harbor hydrographic survey data sets. The results show that one should record the name and version of the software, the method, the input parameters they used in detail. The dredging volume calculation differences between different software and methods were compared. Enough survey data density should be provided and grid size close to the survey data density should be used. New hydrographic standards need to be executed as soon as possible. However, a training program of hydrographer and a licensing system for hydrographic survey also need to be set up at the same time. This study proposes the ways of setting up those system in short-term, intermediate -term and long-term. |
| Post date | 2005/08/15 |
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