大坦沙岛北片区排涝流量分析研究

大坦沙岛北片区位于广州市西部,面积1.35km2,是一个相对独立的排涝区域,对于排涝水闸泵站流量的分析需要考虑降雨过程与潮水遭遇的影响。该文根据广州市的排涝标准,在确定排涝计算条件的基础上,对排涝流量进行了分析论证。首先通过6h平均损失率法净雨过程,计算岛内20a一遇洪水过程线,然后根据调蓄条件,初选泵站排涝流量,再对不同起调水位进行试算,结合1h综合损失率法流量分析,最终选择较合理的计算结果。即:大坦沙岛北片区20a一遇排涝流量为10m3/s,起调水位为0.2m。此外,不同的起调水位,对流量调算有显著影响。

Analysis and Study on Drainage Flow in North Area of Datansha Island

The north area of Datansha Island is located at the west of Guangzhou City. Its area is 1.35 km2. It is also a relatively independent drainage area. The analysis on the flow of a drainage sluice pumping station is required to consider the rainfall process and the tidewater influence. According to the drainage standard of Guangzhou City and on the basis of defining the drainage calculation conditions, the article analyzes and demonstrates the drainage flow. The article firstly calculates the flood process li...