日本的年降雨量达1714mm,为世界平均量的一倍,是一个水资源相对丰富的岛国。但尽管如此,日本人仍居安思危,千方百计地节约用水,并在这方面积累了较为丰富的经验。工业废水的回收利用率稳定在78%左右。水资源有生活用水、工业用水、农业用水之分,但无论哪种用途,日本人都贯彻节 Japan’s annual rainfall of 1714mm, twice the world average, is a relatively rich water island nation. In spite of this, the Japanese are still at a serious loss in their daily activities and try their best to save water, and have accumulated a wealth of experience in this regard. Industrial wastewater recycling rate stabilized at about 78%. Water resources have domestic water, industrial water, agricultural water points, but no matter what kind of use, the Japanese are implementing the section