The quantity of surface water and ground water, water resources gross and its available quantity of these years are calculated.
计算了郑州市地表水资源量、地下水资源量、水资源总量和水资源可利用量。
Ground water and surface water are the main resources of the drinking water at present time.
目前农药的使用越来越广泛，而地表水资源却日益短缺。
Ground water and surface water are the main resources of the drinking water at present time.
目前农药的使用越来越广泛，而地表水资源却日益短缺。
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