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- Title
黄河口冲淤演变及治理研究综述.
- Authors
郑 珊; 王开荣; 吴保生; 吕宜卫; 韩 琦
- Abstract
This paper reviewed the changes in the water discharge and sediment load to the Yellow River delta, the major and minor cycles of delta evolution, the delayed response of delta channel to avulsions and the recent aggradation and degradation processes of the delta. It summarized the studies on the impacts of retrogressive aggradation caused by delta extension on the Lower Yellow River (LYR), the critical water discharge and sediment load for the balance of erosion and aggradation at the delta, the future water volume and sediment load and the ecological evolution at the delta. Most studies had argued that the channel reaches at the downstream of Aishan or Luokou stations were impacted by the retrogressive aggradation caused by delta extension. Nevertheless, consensus had not yet been reached on the issue that whether the channel reaches at the upstream of Aishan was impacted by the retrogressive aggradation or not. Thus, future study was needed to investigate the impacts of delta evolution on the LTR. Present studies have shown that the sediment load of 0.15 billion t/a is required per year to keep the erosion and aggradation balance at the Qingshuigou channel, while the critical sediment load for the balance of the erosion and accretion of the delta land is between 0.274 billion—0.421 billion t/a. A unified calculation method for the critical water and sediment conditions needs to be developed in the future based on the physical mechanics of interplays among river flow, tides, waves and the boundaries of river channel and shoreline, etc. In addition, further study should be devoted to the prediction of the future water and sediment fluxes to the delta under the impacts of natural and anthropogenic factors and the ecological response of the delta.
- Publication
Yellow River, 2018, Vol 40, Issue 10, p6
- ISSN
1000-1379
- Publication type
Article
- DOI
10.3969/j.issn.1000-1379.2018.10.002