| The scale of economics represents the size of a country's general strength, and supports the rapid development. As a result of the reform and opening-up policy, the economics of our country has been developing rapidly, and stepping into the era of and industrialization. There are a variety of industries emerged and grew in China, especially in the coastal areas where industries are more intensive. With the rapid development of economics, the demand for electricity has been increasing dramatically. Therefore, the power industry has been stepping into a rapid development period. In order to save cost, the coastal power plants, mainly thermal power plants and nuclear power plants, always locate on the gulf. The coastal thermal/nuclear power plants always use seawater to cool the generating set for convinient and discharge the warmed water into sea directly, which would influent the seawater ecosystem.Environmental protection as an important national policy, the process of teaching geography in secondary schools become the focus of the past, the main mode of teaching in words and pictures the main cooling water for the environmental impact of the students know very little.Currently, we always adopt the artificial investigation method to monitor and evaluat the thermal water. However, this method wastes a lot of time and the result is inaccuracy. In addition, the monitoring scope is limited. With the development of computer technology, there are alternative methods to monitor and evaluat the thermal discharge, in particular of the development of GIS technology. GIS could monitor and evaluat the thermal discharge spatially, so the result is more accurate. At present, there are some disadvantages for GIS to monitor and evaluat the thermal disacharge. Such as GIS always make classification based on remote sensing images, but rarely retrive information. And the theoretical framework of GIS technology is not perfect, and the analysis results are less applied in the monitoring and evaluation. Most important, there is not a comprehensive software to monitor and evaluate thermal dischage's pollution range rapidly. In order to solve the problem, this research try to design a thermal discharg monitoring and evaluation platform based on GIS technology and the power plants monitoring data, and presents the method to monitor thermal discharge dynamically. Through the establishment of assessment system, teaching of geography in the daily process, through analysis of the actual assessment of students intuitive understanding of the cooling water for the water level of contamination of the environment to enable students to understand the extent of the damage to the ecosystem.The main work and conclusions of this research includes:1) Retrive sea environment factors from the remote sensing image. Under the help of ArcGIS and ERDAS software, supervised classification is acommplished based on remote sensing image. And the land use/cover is extracted in order to judge the power station's influence to the social and economic development. At the same time, the sea surfece temperature is retrived from the remote sensing image, which displays the thermal discharge's influence to the sea water from a large scale.2) In order to make the monitoring and evaluation more accurate, this subject establish the evaluation ceriteria based on the social survey about the power plant intergrated with the national standards.3) Based on the concept of object-oriented programming, this subject establish the thermal water monitoring and evaluating platform with Microsoft Visual Studio, ArcGIS Engine and other technologies. Therefore, the thermal discharge can be monitored and evaluated quickly, and it can guide the power plants to normal operation. As well, the ecosystem can be protected. |
