英语翻译Table 11.1 Main uses of freshwater resources (Kiely,1997)Abstraction In Stream UsesDomestic supply Biological exploitation Irrigation Power generation Industry-manufacturing Transport/navigation Industry-cooling Recreation/amenity Flushin

英语翻译Table 11.1 Main uses of freshwater resources (Kiely,1997)Abstraction In Stream UsesDomestic supply Biological exploitation Irrigation Power generation Industry-manufacturing Transport/navigation Industry-cooling Recreation/amenity Flushin
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;

英语翻译Table 11.1 Main uses of freshwater resources (Kiely,1997)Abstraction In Stream UsesDomestic supply Biological exploitation Irrigation Power generation Industry-manufacturing Transport/navigation Industry-cooling Recreation/amenity Flushin
图表1.11淡水资源的主要用途 (Kiely,1997)
河流的使用
家庭的供应生物消耗
灌溉发电
工业制造业运输/导航
工业冷却娱乐/市容
开掘沟渠洪水控制
流域之间引水废水
图表1.11中水的使用极大地影响了水资源.
家庭,工业和农业用水产生大量废水,影响到水体,因此,造成水质恶化.同样地,水流的使用对水产资源的性质产生不利影响,造成水污染.
水体污染的定义是：人类活动造成的“
“大量的对水体(湖泊,河流,海洋,地下水）的不利影响 "(Wikipedia,2006).
从本质上讲,所有的水体含有许多自然产生的物质,主要的碳酸氢盐 ,硫酸盐,钠,氯,钙,镁,钾,可能来自于：
•土壤,地质结构和地形集水区（流域） ;
•周围的植被和野生动物;
•降水和径流从邻近的土地;
•生物,物理和化学过程中的水;