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日本对水资源的开发(?)在战前基本是属于河川自然流量利用阶段。战后随着社会经济的发展逐渐进入了水资源综合开发利用、水利设施系统与社会系统平衡再发展的阶段,其重点是由农业转向工业和日常生活。到70年代中期,日本全国总用水量已达枯水年可利用水资源量的1/4左右。近十多年来,一直持续在近900亿立方米的用水水平,其中农业用水占2/3,工业和
Japan’s development of water resources (?) Basically belonged to the natural flow utilization of rivers before the war. With the social and economic development after the war, it gradually entered the stage of comprehensive development and utilization of water resources and the balanced development of the water conservancy facilities and social systems. The emphasis was on the shift from agriculture to industry and daily life. By the mid-1970s, the total water consumption in Japan had reached about one-quarter of the amount of water available for dry years. In the past ten years or so, it has been in the level of nearly 90 billion cubic meters of water, of which agricultural water accounts for 2/3 of industrial and