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前言 長江是世界著名的大河,它的長度和水量都佔第四位,全流域面積約180余万平方公里,內有居民約2億3千余万,農作物産量約佔全國的43％全年入海水量平均达1万億公方以上,約等于黄河全年入海总量的22倍,干支流沿岸地区絕大部分物資交流以航运为主是它的重要特点之一,現有自然情况的通航里程即达5万4千余公里,水运年总量約佔全國河运与海运总量的70—75％,已知的水能蘊藏量約在1億4千万瓩以上,並且相当接近丰富的地下資源和正在發展的經济中心,因此長江流域的綜合开發是我國社会主义經济建設計划中的一項極其重大的任务。
Foreword The Yangtze River is a famous river in the world. Its length and amount of water account for the fourth place. The whole basin covers an area of about 180 million square kilometers with about 230 million inhabitants and 43% of the country’s total crop production. The average amount of water entering the sea is more than 1 trillion square meters, which is about 22 times of the annual total amount of the Yellow River entering the sea. Most of the coastal areas and tributaries of the dry and tributary areas are dominated by shipping. One of its important features is its navigable mileage That is 54,000 kilometers. The total annual water transport accounts for about 70-75% of the total volume of river shipping and shipping in the country. The known water energy reserves are above 140 million tons and are quite close to the rich underground Resources and the developing economic center. Therefore, the comprehensive development of the Yangtze River Basin is an extremely important task in the socialist economic construction plan of our country.