基于虚拟城市模型的城市形态对污水系统影响研究

doi:10.18306/dlkxjz.2019.03.013

Abstract

Abstract:

Urban sewage systems in China have been developing rapidly in recent years, with problems of system hydraulic failure in peak period, challenge from change of drainage scenario caused by population change, climate change, and water saving behavior; and urban form is closely related to the operation of urban facilities. This study set up urban morphology scenarios and drainage scenarios, built a top-down virtual model of urban space and sewage system, used Kruscal algorithm for network routing and SWMM software for system simulation, and sampled a large number of sewage system solutions, to explore life cycle cost, structure, and operation of urban sewage systems, and assess urban sewage systems with regard to economic performance, effectiveness, and adaptability. The study found that life cycle cost is about 600-700 million yuan for the city. The velocity failure rate of square, rectangular, and star-shaped cities is 0.55, 0.67, and 0.55 respectively, and the capacity failure rate is 0.35, 0.42, and 0.36. Under the low discharge sewage scenario, velocity failure of the system turns more serious, and capacity failure of the system is improved. Under the high discharge sewage scenario, velocity failure is improved, but capacity failure is more serious. More dispersed sewage systems have better connectedness and the sewage system of rectangular city is more centralized than the square and star-shaped cities. Correlation analysis showed that the more dispersed sewage system is more economical and effective, but the adaptability is worse. Finally, from the perspective of system economy and effectiveness, square and star-shaped cities perform better. With regard to the adaptability of sewage system, rectangular city is superior to square and star-shaped cities. Based on the urban forms of the 86 Chinese urban areas examined in this study, the development trend is unreasonable. It is hoped that the conclusion can provide some reference for future urban planning and urban form management.

Key words: virtual city, sewage system, urban form, drainage scenario, comprehensive evaluation

Shan LIANG, Yu DENG, Ning JIA, Yi LIU. Impact of urban morphology on sewage systems based on a virtual city modeling approach[J].PROGRESS IN GEOGRAPHY, 2019, 38(3): 441-451.

Figures/Tables 11

Fig.1

Fig.2

Tab.1

Urban morphology change classification of prefecture-level cities of China, 2010-2015"

形态变化	东北(33)	华东(77)	华南(34)	华中(40)	西北(27)	西南(32)	华北(30)
方形→方形(30)	鞍山、四平、绥化	丽水、枣庄、德州、福州、厦门、蚌埠、亳州	海口、梅州、汕头	娄底、信阳、漯河、商丘	克拉玛依、汉中、西安、吴忠、嘉峪关	资阳	天津、长治、巴彦淖尔、保定、邯郸、邢台、北京
方形→星形(42)	阜新、辽阳、朝阳、沈阳、营口、长春、辽源	湖州、宁波、衢州、济宁、泰安、聊城、潍坊、菏泽、日照、赣州、泰州、扬州、淮安、龙岩、宿州、阜阳、安庆	北海、玉林、河源	周口、郑州、洛阳、安阳、开封、新乡、驻马店	渭南、固原、庆阳	玉溪、保山	乌兰察布、呼和浩特、沧州
方形→长条(10)	抚顺	东营、盐城、宿迁、南通、马鞍山、池州	—	—	咸阳	—	忻州、石家庄
长条→长条(52)	丹东、通化、佳木斯、七台河、鹤岗	舟山、温州、杭州、临沂、镇江、三明、南平、芜湖、淮南	防城港、广州、中山、汕尾、肇庆、江门、阳江、揭阳	张家界、黄石、宜昌、荆门、平顶山、鹤壁、焦作	西宁、铜川、宝鸡、延安、天水、平凉、兰州、金昌	重庆、昭通、宜宾、广元、攀枝花、雅安、南充、遂宁、拉萨、六盘水、贵阳	大同、阳泉、承德、张家口
长条→星形(23)	本溪、白山	威海、南昌、景德镇、宜春、九江、吉安、上饶、常州	三亚、梧州、南宁、惠州、韶关、清远	永州、襄阳	乌鲁木齐、银川	巴中、铜仁	运城
长条→方形(2)	—	—	东莞	—	—	眉山	—
星形→星形(74)	锦州、铁岭、葫芦岛、松原、牡丹江、哈尔滨、黑河	绍兴、台州、金华、上海、淄博、青岛、莱芜、滨州、抚州、新余、萍乡、连云港、南京、苏州、无锡、宁德、合肥、铜陵、黄山、滁州、六安	河池、桂林、柳州、湛江、深圳、珠海、潮州、佛山、茂名	湘潭、邵阳、怀化、株洲、益阳、郴州、黄冈、孝感、咸宁、鄂州、武汉、十堰、许昌、南阳	榆林、安康、张掖、酒泉、白银	昆明、丽江、达州、乐山、绵阳、自贡、内江、成都、广安、德阳、安顺	太原、赤峰、通辽、鄂尔多斯、乌海、秦皇岛、鄂尔多斯
星形→长条(24)	大连、白城、伊春、鸡西、大庆	嘉兴、烟台、济南、泉州、漳州、莆田、淮北	贵港、百色、云浮	岳阳、常德、长沙、三门峡	商洛、定西	曲靖、遵义	包头
星形→方形(16)	盘锦、吉林、齐齐哈尔	鹰潭、徐州	钦州	衡阳、濮阳	武威	临沧、泸州	朔州、晋中、临汾、衡水、廊坊

Tab.1

Fig.3

Fig.4

Fig.5

Fig.6

Tab.2

Fig.7

Fig.8

Fig.9

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Pearson 相关性	生命周期成本	V_failure	C_failure	flexibility_L_V	flexibility_H_V	flexibility_L_C	flexibility_H_C
边介数	0.392^**	0.509^**	0.211^**	-0.591^**	-0.591^**	-0.144^**	-0.288^**
全局效率	-0.406^**	-0.439^**	-0.179^**	0.516^**	0.521^**	0.129^*	0.250^**

Impact of urban morphology on sewage systems based on a virtual city modeling approach

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