整合地形因素,在山区有效的城市海绵建设:一个案例研究
Yuzhong Chen1, Yalin Su1, Yingxu Gong1
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, Harbin, China.
Journal of environmental management
|July 9, 2024
概括
在山区的海绵城市建设是通过考虑地形来优化. 一种创新的方法平衡了成本效益和弹性,大大降低了成本,同时实现了高排水控制.
科学领域:
- 城市规划和环境工程
- 水文和水资源管理 水文和水资源管理
- 地理信息系统 (GIS) 是指地理信息系统.
背景情况:
- 海绵城市建设对于山区的可持续发展至关重要.
- 挑战包括崎的地形,海拔变化和城市分布不均,导致高成本和复杂的规划.
- 有限的研究存在于地形对海绵城市规划的具体影响.
研究的目的:
- 根据每年排水控制率,为山区海绵城市开发一个最佳的低影响开发 (LID) 系统布局方法.
- 调查地形特征对LID部署策略的影响.
- 提出一个分阶段实施的方法来平衡成本效益和弹性.
主要方法:
- 开发一种最佳的LID系统布局方法,使用年度流水控制率作为主要指标.
- 在方案选择中,采用类似于理想解决方案的优先顺序 (TOPSIS) 技术.
- 结构方程建模 (SEM) 用于分析地形,土地类型,表面不透性,排水系数和LID计划之间的关系.
主要成果:
- 优化案例1_100方案,考虑到区域差异,在98.86%的区域实现了下游控制系数低于0.25.
- 这种优化方案的成本为122亿元人民币,远低于未经优化的case2_100计划303亿元人民币.
- 发现地形特征 (相对高度和斜率) 对LID布局和空间模式有显著影响 (R2=0.84).
结论:
- 地形是影响山区海绵城市LID战略设计和有效性的关键因素.
- 与非优化方法相比,优化,地形意识的LID计划可以显著降低成本并提高弹性.
- 该研究为新的山区城市规划和优化LID建设以实现可持续发展提供了宝贵的见解.
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