Abstract
In recent years, the water and sediment pattern of the Yellow River has changed significantly, and a preliminary water and sediment regulation system was constructed. Based on a summary of the regulation principles of water and sediment in the Middle Yellow River, this paper proposes three key technologies to determine the water and sediment control thresholds, the artificial creation of a long-distance density current, and an engineering regulation for water and sediment control of the Yellow River. Taking the actual flood and sedimentation regulation of the Yellow River Basin in 2018 as an example, the practical applications of these relevant technologies are analyzed. This study provides an important theoretical and practical reference for the flood and sediment regulation of sediment-laden rivers in arid and semi-arid areas during flood season.
Highlights
The Yellow River passes through the Loess Plateau which is the largest c in the world
The storm floods in the Middle Yellow River mainly come from the sections of Hekou Town to Longmen, Longmen to Sanmenxia, and Sanmenxia to Huayuankou
The goal of water and sediment regulation is to limit the model can effectively control the water and sediment control targets of the control points within an allowable process and the river channel sediment transport process range through joint regulation of the reservoir group
Summary
The Yellow River passes through the Loess Plateau which is the largest c in the world. According to the temporal and spatial distribution of floods, the floods from the river water of Helongjian and Longsanjian upstream of Sanmenxia are called “upper heavy floods.” They are characterized by high peaks, large volumes, and large sediment content, which pose a serious threat to flood protection in the Lower Yellow River. The floods from the river water of the main stream between Sanmenxia and Huayuankou and the tributaries of the Yiluo River and Qin River are called “lower heavy floods.” They have the characteristics of high flood peaks, strong rises, concentrated flooding, small sediment content, and short foresight periods, which makes them the most serious threat to flood protection in the Lower Yellow River. (Note: d < 0.025 mm of fine sediment content accounts for more than 90% of total sediment.)
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