基于复杂高密度管网结构优化技术的银川城区排水过程高效模拟方法  

Efficient simulation method of Yinchuan urban drainage process based on structure optimization technology of complex high-density pipe network

作　　者：栾广学 侯精明 王添[1] 李欣怡 郭敏鹏 李东来 樊超 沈健 LUAN Guangxue;HOU Jingming;WANG Tian;LI Xinyi;GUO Minpeng;LI Donglai;FAN Chao;SHEN Jian(State Key Laboratory of Eco-Hydraulics in Northwest Arid Region,Xi'an University of Technology,Xi'an 710048,China;CAUPD Beijing Planning and Design Consultants Ltd.,Beijing 100044,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048 [2]中规院(北京)规划设计有限公司,北京100044

出　　处：《水资源保护》2023年第3期205-212,共8页Water Resources Protection

基　　金：中德合作交流项目(M-0427);国家自然科学基金(52009104,52079106)。

摘　　要：为高效高精度模拟大尺度城区的排水过程,掌握城市地表径流机制和管网排水规律,以银川市约310 km^(2)的城区为研究区域,应用耦合地表径流及城市地下管网排水过程的GAST模型,结合当地污水处理厂、管网、地形和土地利用等特征,基于普适性的数字地形高程DEM数据处理、土地利用类型划分、合流制排水管网和污水处理厂概化等技术,提出了一种基于复杂高密度管网结构优化技术的城区排水过程高效模拟方法。采用理想地形和实际地形对该方法模拟的精度和效率进行了验证,结果表明:对一级支管做删除概化处理对实际的管网排水过程模拟结果影响较小,20.46 km^(2)区域内一二维耦合节点数可削减27.8%,模型计算效率提高12.18%,且研究区域越大,计算效率提升越明显;模拟结果与实测值误差在6%以内,在保证模拟精度的同时大幅提高了计算效率。To simulate large scale urban drainage process with high-efficiency and high-precision,and master the mechanism of urban surface runoff and pipe drainage pattern,taking the 310 km^(2) urban area in Yinchuan as the studied area,a GAST model with coupled surface runoff and urban underground pipe network drainage process,combined with characteristics of local wastewater treatment plants,pipe networks,topography,land use,etc.,is applied to raise an efficient simulation method for rapid modeling of urban drainage processes based on complex high-density pipe network structure optimization technology,which is based on technologies including universal DEM data processing,land use type classification,combined drainage network and wastewater treatment plant generalization,etc.The accuracy and efficiency of this modeling method is verified with both ideal terrain and actual terrain.The results show that:applying deletion treatment on the primary branch pipe has insignificant influence on the simulation results of the actual pipe network drainage process.In the 20.46 km^(2) area,the number of 1D-2D coupling nodes is reduced by 27.8%,and the calculation efficiency of the model can be improved by 12.18%.The larger the study area is,the more significant improvement in calculation efficiency there would be.The errors between simulation results and measured values are smaller than 6%,which indicates that the proposed method can greatly improve the calculation efficiency while the simulation accuracy ensured.

关 键 词：城区排水 管网结构优化 一二维耦合模型 银川市 

分 类 号：TU992.4[建筑科学—市政工程]