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Non point source ground water pollution trends in an urban area
1
《Global Geology》 1998年第1期3-4,共2页
关键词 Non point source ground water pollution trends in an urban area
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Agriculture and Water Sources Protection Zones in the Czech Republic
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作者 Petra Oppeltova 《Journal of Agricultural Science and Technology(A)》 2012年第10期1155-1161,共7页
The area of interest is located in the South Moravia Region at the confluence of the Jihlava, Oslava and Rokytn^i rivers. Ivan^ice spring area comprises a series of hydrologic boreholes, it is the main water source fo... The area of interest is located in the South Moravia Region at the confluence of the Jihlava, Oslava and Rokytn^i rivers. Ivan^ice spring area comprises a series of hydrologic boreholes, it is the main water source for water supply of Ivan^ice and Rosice towns and provides water for 30,000 inhabitants. The risk analysis was created on the basis of water quality monitoring, hydrogeological assessment and terrain exploration and a revision of protection zones was proposed. The spring area is situated in nitrate vulnerable zones and recently nitrate concentrations have been decreasing. Water quality evaluation results: high concentration of manganese and iron, sometimes higher concentration of ammonium and COD. This area is intensively used for agriculture and it is necessary to make a compromise solution during protection zones proposal, The regime in protection zones can not affect manganese and iron concentration (their origin is in the natural geological environment). Therefore, water treatment plant is in operation and its modernization is proposed. Furthermore, the paper deals with spring area intensification construction of a new hydrologic borehole, and managed and unmanaged infiltration of surface water. The proposal of protection zones revision consists of reduction to a 2nd level protection zone. 展开更多
关键词 water quality ground water source of drinking water good agricultural practice nitrate vulnerable zones CzechRepublic.
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