However, as a result of unenlightened management means and methods, the water use efficiencies are universally low, and the waste of water is serious in irrigation areas.
然而，由于管理手段和方法的落后，我国灌区普遍存在水资源利用率低下，水资源浪费严重的现象。
China is a country with severe water shortage. The main problems of the water resources management are water pollution, low efficiency of water using, water waste and behind the management level.
中国是水资源严重短缺的国家，水环境污染、用水效率低、用水浪费和管理水平落后是我国水资源管理中存在的主要问题。
China is a country with severe water shortage. The main problems of the water resources management are water pollution, low efficiency of water using, water waste and behind the management level.
中国是水资源严重短缺的国家，水环境污染、用水效率低、用水浪费和管理水平落后是我国水资源管理中存在的主要问题。
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