英语翻译Table 11.1 Main uses of freshwater resources (Kiely,1997

英语翻译
Table 11.1 Main uses of freshwater resources (Kiely,1997)
Abstraction In Stream Uses
Domestic supply Biological exploitation
Irrigation Power generation
Industry-manufacturing Transport/navigation
Industry-cooling Recreation/amenity
Flushing off canals Flood control
Diversion between catchments Waste
Water resources are greatly influenced by all the uses indicated in Table 11.1.
Domestic,industrial and agricultural use of water generates large volume of discharges which are given to water bodies,and therefore cause the deterioration of water quality.Similarly,stream uses also influence adversely the nature of aquatic resources and cause water pollution.
Water pollution is defined as “a large set of adverse effects upon water bodies
(lakes,rivers,oceans,groundwater) caused by human activities” (Wikipedia,
2006).In essence,all water bodies contain many naturally occurring substances— mainly bicarbonates,sulphates,sodium,chlorides,calcium,magnesium and potassium which might originate from:
• Soil,geologic formations and terrain in the catchment area (river basin);
• Surrounding vegetation and wildlife;
• Precipitation and runoff from adjacent land;
• Biological,physical and chemical processes in the water;