PEIOS系统是珠江口海域立体监测技术示范系统，其总体目标是研制一个以水质监测为核心、以珠江口水域为监测范围的河口区近岸海洋环境监测示范系统。该系统接收多种来源的远距离观测数据（卫星、岸基雷达、自动气象站、自动水质测试仪...PEIOS系统是珠江口海域立体监测技术示范系统，其总体目标是研制一个以水质监测为核心、以珠江口水域为监测范围的河口区近岸海洋环境监测示范系统。该系统接收多种来源的远距离观测数据（卫星、岸基雷达、自动气象站、自动水质测试仪等），并具有数据实时更新的能力。它的远程用户模块可通过电话拨号连接主数据库，进行相关的空间信息查询与分析，是相对独立的功能模块；同时，该模块还具有集成本地（用户端）数据的功能。作者提出了基于优秀地理信息系统平台的技术解决方案，并在 Autodesk World 2．0平台上成功开发了远程用户模块，实现了多源数据在远程用户端的GIS集成。展开更多
Nha Trang Bay is famous not only because of its beauty, but also of the biodiversity values, especially coral reefs. Thus, the sea water quality monitoring systems are necessary for effective and available managements...Nha Trang Bay is famous not only because of its beauty, but also of the biodiversity values, especially coral reefs. Thus, the sea water quality monitoring systems are necessary for effective and available managements to protect the ecosystems and for sustainable development. There have been several monitoring systems here but they have been done separately and unconnectedly. This research was done to take an overview and access the status and changes of water quality from 2007-2014. The data obtained rainy seasons over the years showed a quite good environment here. The environment changes were also monitored and there were some changes between seasons and over years, decreasing, increasing, or unobvious trends. However, the difference was not so much; and there was not the sign of environmental degradation in the bay from 2007 to 2014. Besides, the stoichiometric nutrients limitations were initially assessed. Since Si ratios here were always higher compared to N and P, there was not increased potential for non-diatom algal blooms. Together with the recorded nutrients concentration data, it can be said that there was no evidence of eutrophication in the bay. Although there was partial contamination of some parameters at few moments, the sea water quality of Nha Trang bay was still in a good condition （according to Vietnamese and ASEAN criteria）.展开更多
Wave field around Taipei Port is studied. Using marine radar as a monitoring device, sequences of the wave field images were obtained on an hourly basis. A 3D-FFT was applied to the image sequences leading to the so-c...Wave field around Taipei Port is studied. Using marine radar as a monitoring device, sequences of the wave field images were obtained on an hourly basis. A 3D-FFT was applied to the image sequences leading to the so-called intensity wavenumber-frequency spectrum. Wave field information can then be extracted from these spectra and compared with on-site measurements. It is shown that, when the prevailing winds are weak, estimated wave heights agree miserably with those measured. On the other hand, when the winds are relatively strong, our estimates follow closely with the trends, but are, in general, lower than measured. Possible reasons leading to these discrepancies are discussed.展开更多
文摘PEIOS系统是珠江口海域立体监测技术示范系统，其总体目标是研制一个以水质监测为核心、以珠江口水域为监测范围的河口区近岸海洋环境监测示范系统。该系统接收多种来源的远距离观测数据（卫星、岸基雷达、自动气象站、自动水质测试仪等），并具有数据实时更新的能力。它的远程用户模块可通过电话拨号连接主数据库，进行相关的空间信息查询与分析，是相对独立的功能模块；同时，该模块还具有集成本地（用户端）数据的功能。作者提出了基于优秀地理信息系统平台的技术解决方案，并在 Autodesk World 2．0平台上成功开发了远程用户模块，实现了多源数据在远程用户端的GIS集成。
文摘Nha Trang Bay is famous not only because of its beauty, but also of the biodiversity values, especially coral reefs. Thus, the sea water quality monitoring systems are necessary for effective and available managements to protect the ecosystems and for sustainable development. There have been several monitoring systems here but they have been done separately and unconnectedly. This research was done to take an overview and access the status and changes of water quality from 2007-2014. The data obtained rainy seasons over the years showed a quite good environment here. The environment changes were also monitored and there were some changes between seasons and over years, decreasing, increasing, or unobvious trends. However, the difference was not so much; and there was not the sign of environmental degradation in the bay from 2007 to 2014. Besides, the stoichiometric nutrients limitations were initially assessed. Since Si ratios here were always higher compared to N and P, there was not increased potential for non-diatom algal blooms. Together with the recorded nutrients concentration data, it can be said that there was no evidence of eutrophication in the bay. Although there was partial contamination of some parameters at few moments, the sea water quality of Nha Trang bay was still in a good condition （according to Vietnamese and ASEAN criteria）.
文摘Wave field around Taipei Port is studied. Using marine radar as a monitoring device, sequences of the wave field images were obtained on an hourly basis. A 3D-FFT was applied to the image sequences leading to the so-called intensity wavenumber-frequency spectrum. Wave field information can then be extracted from these spectra and compared with on-site measurements. It is shown that, when the prevailing winds are weak, estimated wave heights agree miserably with those measured. On the other hand, when the winds are relatively strong, our estimates follow closely with the trends, but are, in general, lower than measured. Possible reasons leading to these discrepancies are discussed.
