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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第45卷

期数:

2023年第02期

页码:

427-436

栏目:

水资源与水文地质

出版日期:

2023-03-15

文章信息/Info

Title:

Drainage Effect of Urban Drainage-pipe Network Under Extreme Rainstorms—Taking Fengxi New City in Xi'an City, China as an Example

文章编号:

1672-6561(2023)02-0427-10

作者:

侯精明¹; 董美君¹; 李东来¹; 马 越²; 姬国强²; 张 松³

(1. 西安理工大学 西北旱区生态水利国家重点实验室,陕西 西安 710048; 2. 陕西省西咸新区沣西新城开发建设(集团)有限公司 海绵城市技术中心,陕西 西安 710061; 3. 四川水利职业技术学院,四川 成都 611830)

Author(s):

HOU Jing-ming¹;  DONG Mei-jun¹;  LI Dong-lai¹;  MA Yue²;  JI Guo-qiang²;  ZHANG Song³

(1. State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi, China; 2. Research Center for Sponge City, Fengxi New City Development and Construction Group of Shaanxi Xixian New Area Co., Ltd., Xi'an 710061, Shaanxi, China; 3. Sichuan Water Conservancy College, Chengdu 611830, Sichuan, China)

关键词:

管网排水;  雨水管网;  耦合模型;  内涝;  超标暴雨;  超载率;  排水率;  西安

Keywords:

drainage of pipe network;  drainage-pipe network;  coupled model;  inundation;  extreme rainstorm;  overload rate;  drainage rate;  Xi'an

分类号:

TU992

DOI:

10.19814/j.jese.2022.03010

文献标志码:

A

摘要:

雨水管网是城市降雨径流的重要通道,其排水效果直接关系到城市排水防涝的安全,探明不同降雨下城市管网的排水效果对缓解城市内涝至关重要。采用GAST-SWMM耦合模型,以西安市沣西新城某区域为研究对象,设置1、2、5、10、30年一遇5个常规降雨以及50年一遇和100年一遇两种超标暴雨下区域2 h设计降雨过程,模拟研究区域不同重现期降雨下的管网排水情况,计算管道超载率和管网排水量,对管网排水效果进行量化评估。结果表明:常规降雨下管道超载率为0.00%～51.22%,100年一遇超标暴雨下达到64.63%,在降雨重现期达到30年一遇时管道超载率高于50%; 1年一遇至100年一遇降雨条件下管网排水量占区域总降雨量的3.55%～22.25%,且随着重现期增长,排水量增加呈减缓趋势。大部分排水管网在超标暴雨甚至30年一遇常规降雨下处于超载状态,但在排水口畅通情况下依然具有排水能力,在城市排水除涝过程中作用显著。本研究为城市雨水管网规划、设计和运维提供参考。

Abstract:

Drainage-pipe network is an important channel for urban rainfall runoff, and its drainage effect related to the safety of urban drainage and flood prevention directly. In order to alleviate urban flood, it is crucial to explore the drainage effect of urban drainage-pipe network under different rainfalls. However, there is no systematic research on how the pipeline network responds to the changes in the drainage effect of different rain-fall intensities. GAST-SWMM coupled model was the tool used in this study. The study area is a certain of Fengxi new city in Xi'an. 1-, 2-, 5-, 10- and 30-year recurrence periods of regular rainfall, and 50-, 100-year recurrence periods of excessive rainstorm were setted, 2 h design rainfall process was used to simulate. The drainage situation of the pipeline network under different rainfall in the study area was simulated, the overload rate of the pipeline and the drainage volume of the pipeline network was calculated, and the drainage effect of the pipeline network was quantitatively evaluated. The results show that the pipeline overload rate is 0.00%-51.22% under conventional rains(recurrence period of rainfall is less than or equal to 30-year), and 64.63% when the recurrence period of rainstorm is 100-year; When the recurrence period of rainfall attains 30-year, the pipeline overload rate is over 50% and the amount of water discharged through the pipe network accounts for 3.55%-22.25% of the total rainfall, and with the increase of the recurrence period, the increase of discharge shows a slowing trend. The most of the drainage-pipe network is overloaded under excessive rainfall even in 30-year recurrence period of rainfall, but it still has drainage capacity under this condition and plays a significant role in the process of urban drainage. This study provides a reference for the planning, design and maintenance of urban stormwater pipe networks.

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备注/Memo

备注/Memo:

收稿日期:2022-03-14; 修回日期:2022-06-09
基金项目:国家自然科学基金项目(52079106,52009104); 陕西省科技厅项目(2021SF-484)
作者简介:侯精明(1982-),男,河北怀安人,教授,博士研究生导师,工学博士,E-mail:jingming.hou@xaut.edu.cn。

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更新日期/Last Update: 2023-05-20