区域划分对昌北工业园区的排水防涝技术的优化研究

以南昌市昌北工业园区为研究对象,构建SWMM(storm water management mode)暴雨洪水管理模型;再依据研究区土地性质、雨水系统分布、区域面积等划分为4个不同研究区,进行数字化建模。以一种整体-局部-整体的系统论研究法对昌北工业园区进行内涝分析与技术优化,力求提高其排水防涝标准。对不同研究区域进行水文情况分析,确定不同程度内涝区域并增设LID设施提高排水防涝能力,最后再进行整体区域的验证模拟。结果表明:传统情形下不同空间尺度研究区域均满足1 a排水,5 a排涝,LID设施的增设均使其提高至5~10 a排水标准,10~50 a不等排涝标准;再经整体区域校核模拟可知,整体研究区排水标准由1 a提升至3 a,防涝可由5 a提升至20 a;同时研究表明,研究区Ⅱ中由于调蓄池的存在可显著提高排涝标准,缓解城市管渠负荷,并为南昌市解决城市内涝问题提供了可靠的技术支撑。

Optimization of Waterlogging Control Technology in Changbei Industrial Park by Regional Division

In this study,the Changbei Industrial Park in Nanchang City is taken as an example to construct the SWMM model.According to the land nature,rainwater system distribution and regional area of the study area,it is divided into four different research areas for digital modeling.The waterlogging analysis and technical optimization of Changbei Industrial Park are carried out by means of a whole-local-integral system theory method to improve the standard of drainage and waterlogging control.The hydrological situation of different scale area is analyzed,and the waterlogging area of different degree is found out,and LID is added to improve the drainage and waterlogging control ability.Finally,the whole area is verified and simulated.The results show that there are different space scales under traditional conditions.The drainage standards of 1 year drainage,5 years'drainage,and 5 years of LID increase to 5 years'drainage standards,and 5~20 a unequal drainage standards are improved to 5 years of drainage standards in all the degree areas.Through the overall regional verification simulation,the drainage standard of the whole study area is raised from 1 a to 3 a,and waterlogging control can be raised from 5 a to 20 a.At the same time,the research shows that the existence of the storage tank in the scale II can significantly improve the drainage standards,alleviate the load of urban pipes and canals,and provide reliable technical support for solving the urban waterlogging problem in Nanchang City.