But for cities where water sources have been quite seriously polluted, differentiated water supply modes according to water quality demand might be adopted for different areas.
对于水源污染较严重的城市，则可采取分区分质供水方式。
Taking the case of a mountainous city in North China, this paper explores some effective factors and methods to choose the water-conveying modes of the urban water supply system in mountainous area.
以华北某山区城市为例，探讨了影响山区城市供水输配水方式的因素及选择方法。
Taking the case of a mountainous city in North China, this paper explores some effective factors and methods to choose the water-conveying modes of the urban water supply system in mountainous area.
以华北某山区城市为例，探讨了影响山区城市供水输配水方式的因素及选择方法。
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