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The excessive propagation of algae caused by eutrophication of aquatic environment in the urban source water supply is the main issues of concern to drinking water purification industry in recent years. The prediction of algae in raw water can offer time guarantee for operation of contingency caused by excessive propagation of algae which can ensure the safety of water supply. In the study, we collected...
A 4-month data set was used to investigate historical changes between the number of the Cyanobacteria and concentrations of total nitrogen (TN), total phosphorus (TP), TN:TP, chemical oxygen dawdling (COD), NO3, pH and Chl-a in a shallow temperate zone lake (Guishui Lake, Beijing, China). The aim was to evaluate changes in the risk of Cyanobacteria blooms, which have occurred several times in the...
Pond is an ideal study target which can be regarded as an enclosed ecosystem with little external disturbance such as pollution discharge. The aim of the study is to obtain further understandings of freshwater eutrophication mechanism through a one-year's intensive observation and monitoring program for a shallow pond in Chongming Island, China. The result showed that NO3-N, PO4-P and DTP kept in...
In this paper, based on the correlation analysis and by combining the principal component analysis, a correlation evaluation model-based principal component analysis is established. In the process of the water body evaluation eutrophication, a correlation analysis is conducted between the sample matrix and the standard matrix of the water body eutrophication evaluation. The sequence which has the...
Based on the analysis of the water quality monitoring data of Xingkai Lake in 2008, the eutrophic level of the water body was evaluated through a comprehensive trophic state index method. The results showed that the comprehensive trophic state index (CTSI) was 47.7 for Da Xingkai and 50.1 for Xiao Xingkai, which indicated that Da Xingkai is in a mesotrophic state and Xiao Xingkai in a light eutrophic...
Remote sensing monitors water quality information with wide coverage to monitor spatial change of water bodies easily. Landsat TM has high spatial resolution of 30 meters to monitor details of water bodies. MODIS has its advantage with frequent return visits to monitor algae blooms. Lake Taihu is the third largest freshwater lake in China with cyanophytes blooms annually, which dominates the water...
An account is given of the status of monitoring in a new legal system for environmental protection in Poland. The legal acts such as Environmental Protection Law, Water Law and resulting from it the Ordinance of the Ministry of Environment, which relate to the EU Water Framework Directives (2000/60/EC) were introduced to the Polish legal system. They present the principles by which state monitoring...
The performance of the trophic diatom index (TDI), a new index of trophic status in rivers, was evaluated at sites above and below major sewage works where nutrient removal is being considered. Some modifications to the index are proposed as a result. These include changing the scale from 1 (low nutrients) to 5 (high nutrients) to 0-100, the removal of taxa that are predominately planktonic from the...
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