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近二十年来,有关部门对广州水道洪水位年趋升高问题十分关注,并就其形成原因做了许多探讨。我们也曾对上游来水量、地面的下沉以及河网地形的变化对洪水位上升的影响,做过较详细的论述。这里,再就海洋潮汐因素对广州水道洪水位影响的问题试作探讨,为珠江三角洲的整治提供参考。一、潮汐对洪水位的影响潮汐对洪水的变化影响是复杂的,但又是有规律可寻的。现分述如下。 (一) 引潮力与天气过程和洪水径流的关系引潮力是引起潮汐的原动力。它既能引起海洋潮汐,也能引起大气潮,从而激发天气过程的
In the recent two decades, relevant departments are very concerned about the rising flood level of watercourse in Guangzhou and made many discussions on the reasons for its formation. We have also done a more detailed discussion of the impact of upstream water flow, ground subsidence, and changes in river network topography on the rising flood level. Here, we will try to discuss the influence of ocean tide on the water level of Guangzhou waterway, and provide a reference for the remediation of the Pearl River Delta. First, the impact of tides on the flood level Tidal impact on flood changes is complex, but there is a regular pattern. Now is as follows. (A) The relationship between tide force and weather process and flood runoff Tide force is the driving force that causes tides. It can cause the tide of the oceans, but also can cause atmospheric tide, thus stimulating the weather process