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Quickly and accurately extract the water body information from remote sensing image is an important work in water pollution monitoring and LUCC research. In this paper, water body information of Yixing city in the west of Taihu Lake, China was extracted based on ALOS AVNIR-2 multispectral image, using the multi-level and multi-rule decision tree method. The image was acquired on 29 November 2007,...
To select an optimal method for Nantong region, the study compared normalized difference water index (NDWI), modified normalized difference water index (MNDWI) and relation of spectrum to extract water information with Landsat ETM+ data. Supervised classification that needs training site was used to evaluate the results. Relation of spectrum could accurately extract wide water body such as Tong-Lu...
Status quo model is a graphic model to help complete strategic conflict analysis, which display the players' moving path on different states. In this paper, a deep analysis about states transition path is studied, using Markov chain and conflict resolution technique. The concept of virtual player is introduced whose transition probability matrix is derived from individual player in conflict system...
Sustainability has become a popular word since the last decades, but a practical approach to evaluate sustainability not existed. The evaluation of sustainability in water management needs criteria/indicators and objectives, which define what is good or bad. For comparing sustainable water management alternatives an evaluation method to integrate and rank calculated indicators is needed as well. The...
According to the linear relationship between the measuring data of Yangtze river, the index weight is decided by mean-variance method, triangle whitenization weight function and trapezoid whitenization weight function are established respectively to make grey evaluation for the present situation of water pollution of Yangtze river, finally the expectation results are approximate. This explains that...
This paper analyzes the changes of the water resource utilization rate and per capita water resource of Urumqi city from 1995 to 2007 based on the international standard of water resource exploitation and utilization and Chinese arid land water utilization rate standards. We also study the structure of water consumption, the proportion of utilization water resources of different sections and the main...
In view of the deficiency of classic method evaluating water quality. A grey relational analysis model is proposed to evaluate water quality in river. The principle of grey relational analysis and its process are introduced. Suzhou river was selected and assessed by using this method. And it was found that, compared with the fuzzy complex judgment method, the result was remarkably different. The possible...
The water quality of groundwater in Jining has been assessed comprehensively based on the environmental investigation and monitoring in order to provide the scientific basis for the pollution treatment in the Jining city. This paper discussed the choice of the evaluated factors, the operations of the weight value, and compares with the status of the water quality in the course of the evaluation. The...
In this paper, measured values of annual indexes were directly utilized to assessment. By using projection, we make integrated assessment of environmental quality in Guangzhou City from 2003 to 2007. The order of annual environmental quality is obtained. The results show that the environmental quality in Guangzhou is worrying.
Evaluation of water environment quality plays an important role in environment science. Because of many factors affecting environment quality, it is a basic task to select rational pattern and make full use of limited information from monitors so as to describe environment quality objectively. In view of the deficiency of the traditional methods, based on the grey theory, a grey clustering model is...
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