【摘要】 本文首先采用灰色系统评价方法、空气污染综合指数等方法对中国西部河谷型城市大气、地表水、噪声环境质量进行了客观评价。其次,分析了近年来中国西部河谷型城市环境变化的趋势。最后,提出了改善城市环境质量的若干建议。虽然中国西部部分河谷型城市的环境质量近年来大有改善,但总体上仍然较差。其中,TSP污染十分突出,部分城市的酸雨也日益严重,各主要河流的污染没有明显改善的迹象。更多还原

【Abstract】 The grey system assessment method, air pollution integrated index are applied to evaluate the atmosphere, surface water, noise environmental quality of valley cities in western China.Results show that the environment changes in recent years;Though the environmental quality of some river valley type cities in the west of Chinahaveimproved greatly in recent years,it still relatively bad generally. Among them, TSP is very outstanding in pollution, The acid rain is serious day by dayin some citiestoo. There is no obvious improvement sign in the pollution of main rivers.更多还原