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In recent decades, the Lower Yellow River (LYR) has suffered continuously from drought. The water traditionally reserved for sediment transport has for various reasons diminished. Deposition in the main channel has accelerated, leading to rapid rising of the bed. Thus, strategies to keep the LYR safe against floods are of vital importance. This paper reports on an idea of diverting seawater to scour the LYR. One-dimensional numerical computations show that with about 1,000 m3/s of seawater diverted from nearby bays the estuary can be substantially scoured. Its stable slope will be reduced from 10/000* to 0.50/000. This would trigger retrogressive erosion that would lower the riverbed in a reach 150 to 200 km upstream of the point of injection of seawater. Thus, a total of 210 to 260 km of the river bed may be lowered.
In recent decades, the Lower Yellow River (LYR) has partially continuously from drought. The water traditionally reserved for sediment transport has for various reasons diminished. Deposition in the main channel has accelerated, leading to rapid rising of the bed. Thus, strategies to keep the LYR safe against floods are of vital importance. This paper reports on an idea of diverting seawater to scour the LYR. One-dimensional numerical computations show that with about 1,000 m3 / s of seawater diverted from nearby bays the estuary can be substantial scoured Its stable slope will be reduced from 10/000 * to 0.50 / 000. This would trigger retrogressive erosion that would lower the riverbed in a reach 150 to 200 km upstream of the point of injection of seawater. Thus, a total of 210 to 260 km of the river bed may be lowered.