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一、黄河下游水资源越来越少,黄河断流时间越来越长已成为不争的事实。 多年来,沿黄各地大量引用黄河水,已成为沿黄地区的重要水源和经济、社会发展的重要支柱。但自1972年以来,黄河下游平均三年有两年断流,尤其是进入90年代以后,年年断流,加剧了我国北方,尤其是山东省的水资源紧缺局面,殃及了引黄济青工程。 黄河断流的特点有三:一是断流的时间越来越提前,90年代以前,一般发生在5、6月份。1990年以后,断流时间扩展到冬夏季,早
First, fewer and fewer water resources in the lower reaches of the Yellow River, the Yellow River cut-off time longer and longer has become an indisputable fact. Over the years, extensive quotation of the Yellow River water along the Yellow River has become an important pillar of water resources and economic and social development along the Yellow River. However, since 1972, the average annual discharge of the Yellow River has been on an average of three years for two years since 1972. Especially after it entered the 1990s, the current was cut off year by year, exacerbating the shortage of water resources in the northern part of our country, especially in Shandong Province, affecting the Yellow River Diversion Project . There are three characteristics of the Yellow River cutoff: First, cut off the time more and more early, before the 90s, generally occurs in May and June. After 1990, the flow-off time extended to winter and summer, early