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洪水調查是解放后在水文工作中出現的一項新的工作,也是一項很重要的工作,它可以补充水文計算中观測資料的不足,并可以印証計算成果的准确性。本版照片是長江流域規划办公室組織的洪水調查隊,在長江上游支流調查时拍攝的洪水痕迹的一部分。
Flood investigation is a new work that appears in hydrological work after liberation. It is also an important task that can supplement the shortage of observed data in hydrological calculation and confirm the accuracy of calculation results. This edition of the photo is a part of the flood traces taken by the Flood Investigation Team organized by the Planning Office of the Yangtze River Basin during a tributary investigation of the upper reaches of the Yangtze River.