黄河下游持续淤积原因地质历史分析

Geological and Historical Analysis of Causing Continuous Siltation in the Lower Yellow River

本文依据全新世以来影响黄河下游纵剖面发育的河口延伸、构造运动和来水来沙因素的变化事实，分析认为黄河下游持续淤积是由于地质历史时期华北平原不断的地壳下沉及河口延伸，在过去的来水来沙条件下塑造的黄河下游地势面不能适应现代恶劣的来水来沙条件而产生的淤积。

Based on the analysis of the evolution facts of such factors influencing the longitudinal section development in the lower Yellow River as river mouth extension, tectonic movement, and water flow and sediment development since Holocene Epoch, the viewpoint is proposed in the paper that the reasons for the lower Yellow River continuous siltation are because of the constantly subsiding of earth crust in North China plain and the Yellow River mouth unceasing extension during the geological his tory, and all of these created the lower Yellow River geomorphology under the ancient water and sediment incoming conditions is not adapted to the current worse water flow and sediment conditions and therefore resulted in siltation.