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Clean water is a natural resource that is crucial for life but has very little protection. This was exemplified by the Gold King Mine spill on August 7, 2015, in which three million gallons of acidic mine drainage was released into the head waters of the Animas River. The Animas River is the source for five water supply systems, providing drinking water for tens of thousands of people and irrigation...
In this paper, we introduce the concept of Water flow Driven Sensor Networks for leakage and contamination monitoring in urban water distribution systems. The unique aspect of our work is that the sensor network can be deployed in the underground water network with only access to connection points (through manholes) and driven only by water harvested energy so as to avoid access to AC power or need...
The construction of Gezhouba dam has blocked the migration path of the Chinese sturgeon and forced the formation of a new spawning ground for Chinese sturgeon natural reproduction in the downstream of Gezhouba. The operation of the Three Gorges dam changed the natural course of the river flow and the hydrodynamic characteristics of the Yangtze river. This is bound to affect the aquatic environment...
The Three Gorges Reservoir is the largest water resource project in west China. With water environment change greatly, water quality of the Three Gorges Reservoir needs monitoring urgently. With the properties of high spatial resolution, multi-angle observation and hyperspectral imagery, CHRIS offers a precious data resource for monitoring water quality. We apply CHRIS imagery to detect total suspended...
Fresh water reservoirs can be impacted by several hazardous substances through inputs from agricultural activities, sewage discharges, ground-water leaching and runoffs. The water quality assessment is very important for water quality information sharing of the monitoring and remediation programs to minimize the risk promoted by hazardous substances in aquatic ecosystems. The application of this type...
The water quality of the Tianzhuang Reservoir and its inflows were assessed with the single factor index method to identify the main pollution factor of the reservoir. The spatial-temporal distribution of nitrogen were analyzed to gross judge the main pollution sources. The results indicate NO3--N accounts for more than 65% of the TN in the Tianzhuang Reservoir. The water quality cannot meet V grade...
Eutrophication is a worldwide pollution problem, when the point source pollution is efficiently controlled, pollution load from non-point source has the increasing proportion in the total load. Xiangxi River is selected as the research demonstration area to conduct preliminary study on non-point source pollution for frequent water bloom. Non-point source pollution factors are analyzed in Xiangxi River...
Taking Second Songhua River as the study area, established the SQL Server-based spatial data warehouse. On this basis, using GIS, statistical data mining, visualized data mining and BP neural network to finish data preprocessing, build water quality assessment forecast model, and analyze spatial distributing of water quality. The results show that it is adapted to manage and analyze the spatial data...
On the basis of routine monitoring data, eutrophic state of some reservoir was discriminated by drophic state index and limiting factor on the reservoir eutrophication was analysised also. The results showed that there was a developing trend to eutrophication in spite of good water quality and medium eutrophic state about the reservoir, and phosphorus was limiting factor of reservoir eutrophication...
Pesticides used in agriculture are the most widespread method for pest control all over the world. It is difficult to imagine the levels and security of agricultural yields without synthetic pesticides. However, the irrational use of pesticides has led to serious problems to environment and human health by means of water pollution. Pesticides contribute much to nonpoint source water pollution in Three...
This paper analyzes the problems and trends of water environment and mechanisms of the problems by Ridit Analysis and other qualitative and quantitative analysis methods with water monitoring data and economical data in Xinjiang in 2001-2006. The results show: (1)water qualities of rivers of Xinjiang are slightly pollution and that of Northern is more serious than that of southern in Xinjiang, and...
Water quality stochastic assessment based on Bayes is proposed in this paper. It is applied to assess monthly water-quality monitoring data at the typical sections in Three Gorges Reservoir from the year 2004 to 2006. The typical sections locate at Huanglingmiao, Badong, Guandukou, Xiangxi and so on. The conclusions obtained are listed as follows: (1) Water quality in the reservoir is favorable, and...
Basing on the monitoring data of water quality of LiuJiazhuang section and the analysis results of 4 years, applying fuzzy comprehensive evaluation model, according to LtEnvironmental quality standard for surface waterGt to establish the relevant subjection functions, the quality evaluation of surface water in LiuJiazhuang section is made in this paper. The result shows that the change about the water...
This study investigates the natural and anthropogenic processes that influence the chemistry of surface and groundwater within Laoshan District using multivariate statistical techniques. A total of 3612 surface and groundwater samples were collected between 2003 and 2007, from 19 sites and analysed for their physico-chemical constituents. The chemical data set generated were subjected to Principal...
After water storage of Laohutan reservoir, nitrogen (TN), total phosphorus (TP) and ammonia nitrogen (NH3-N) are the main pollutants. In the first month of water collection, the vertical distribution of TN, TP and NH3-N concentrations is increased distinctly from the surface layer to the bottom layer. It shows that the reservoir water quality is affected by pollutants released from submersed soil...
In order to overcome the weakness of subjectivity in determining weight coefficient of fuzzy comprehensive evaluation method, an attributes recognition method based on coefficient of data-driven is built up, and the weight is determined by the data-mining thinking through comprehensive utilization of classification criteria information and sample information. Utilization of this model to evaluate...
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