摘要
以北京市南沙河为例,从河流生态和行洪安全的角度出发,对城市河流进行探讨分析,旨在确定适宜城市发展的河流平面蜿蜒形态,为城市河流的规划发展提供理论依据。基于河流生态系统结构功能整体性概念模型,选取流速、水深作为特征性指标,以AUTOCAD散点构建南沙河老牛湾附近河段的不同平面蜿蜒形态数据,利用MIKE21模型对所构建的平面蜿蜒形态进行水动力模拟,并对其模拟结果进行梳理。根据系统分析法探讨城市河流不同平面蜿蜒形态与流速水深分布多样性、所选特征鱼类适宜生存流速水深以及河流的行洪安全要求三方面之间的关系,从而确定了蜿蜒度为1.4的平面形态对南沙河老牛湾附近河段的发展建设更为有利,明确了城市河流生态适宜性平面蜿蜒度的定义。
Taking Nanshahe River in Beijing as the study case,urban rivers are discussed and analyzed herein from the aspect of the ecology and flood discharge safety,so as to determine the plane meandering pattern of rive suitable for urban development for providing a theoretical basis for the planning and development of urban river.Based on a holistic conceptual model of the structural function of river ecosystem,the data of different plane meandering patterns at the river section near Laoniuwan River Bay of Nanshahe River are established by AUTOCAD scatter through selecting flow velocity and water depth as the characteristic indexes,and then the relevant hydrodynamic simulation is made with MIKE21 Model for the established plane meandering patterns,while the simulated results are sorted out as well.In accordance with the relevant system analysis method,the requirements in the three aspects of the relationships of different urban river plane meandering patterns with the diversity of flow velocity and water depth distributions,the suitable flow velocity and water depth for the selected characteristic fish as well as the river channel flood discharge safety,and then it is determined that the plane pattern with the meandering degree of 1.4 is more favorable for the development and construction of the river section near Laoniuwan River Bay of Nanshahe River,thus the definition of the plane meandering degree for eco-suitability of urban river is defined.
作者
于子铖
张叶
赵进勇
王琦
彭文启
韩会玲
张晶
YU Zicheng;ZHANG Ye;ZHAO Jinyong;WANG Qi;PENG Wenqi;HAN Huiling;ZHANG Jing(Hebei Agricultural University,Baoding 071001,Hebei,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)
出处
《水利水电技术》
北大核心
2019年第11期95-102,共8页
Water Resources and Hydropower Engineering
基金
水利部公益性行业科研专项(201501030)
国家水体污染控制与治理科技重大专项(2018ZX07105-002)
中国水科院基本科研业务费专项(WE0145B532017)
关键词
城市河流
生态
流速
水深
鱼类
行洪
Urban river
ecology
flow velocity
water depth
fish
flood discharge
作者简介
于子铖(1993-),男,硕士研究生,主要从事于水资源规划管理与水环境方向的研究,E-mail:761014057@qq.com;通信作者:赵进勇(1976-),男,教授级高级工程师,博士,主要从事于河流生态修复、生态水工学等方向的研究,E-mail:zhaojy@iwhr.com。
