“调水调沙”对黄河下游河道过水能力的影响

Impact on Discharge Capacity by Sediment-Runoff Regulation in downstream of the Yellow River

从2002年至今,黄河下游已连续7年进行了调水调沙,主槽河道逐年冲刷,过流能力大大增强,本文通过对调水调沙实测水文资料的分析,论证了调水调沙在该河段所发挥的作用:非饱和状态下的下泄洪水对黄河下游河段产生了有力的冲淤效果,增大了测验河段同水位的过水能力,降低了黄河下游过水断面河床的河底高程,缓解了黄河下游逐年淤积抬高的态势。

Since 2002,the sediment-runoff regulation of Yellow River has persisted in 7 years, the flow capacity of the main channel has been greatly enhanced through erosion. Through the analysis on the measured hydrological data, the water and sediment regulation, the function of sediment-runoff regulation has been demonstrated. Under the non-saturation condition, the flooding discharse has created a strong effect of the erosion and deposition in the lower reaches of the Yellow River, increasing the discharge capacity, reducing the river bed elevation, and alleviating the trend by silting up year by year in downstream of Yellow River.