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Analysis on Water and Sediment Diversion from the Lower Yellow River in 1980's

Zhang Yongchang (Hydraulic Research Institute of YRCC, Zhengzhou, 450003)  
The coming water and sediment were less in 1980's, but water diversion has been increased year after year in the lower reaches. The annual water diversion volume was about 1/4 of the coming water and the annual sediment diverted was varied from 260 to 100 million tons depending on the volume of coming sediment. According to the analysis of water and sediment diversion over the years that water diversion in Henan section above Gaocun was basically stable and tended slightly decrease, while in Shandong section below Gaocun was increased steadily. Such a state of imbalance remains to be readjusted.
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