The Yellow River has been experiencing reduced water and increased sediment since 1986. This imbalance is causing challenges for the river's ecosystem. By analyzing data from different stations, it was found that the natural runoff during flood season has decreased, affecting sediment transport. Predictions show that by 2020 and 2030, the river's natural runoff will decrease further. A representative series of water and sediment levels has been identified for planning purposes. In summary, the Yellow River is facing issues of insufficient water, excessive sediment, and an imbalance between the two.