Department of Civil Engineering, Bucheon University, Bucheon, 14623, South Korea.
Disaster Prevention Research Division, National Disaster Management Institute, Ulsan, 44538, South Korea.
J Environ Manage. 2021 Feb 1;279:111546. doi: 10.1016/j.jenvman.2020.111546. Epub 2020 Nov 10.
Determining appropriate road drainage grate installation intervals requires an equation for estimating the flow intercepted by each grate inlet and its interception efficiency. In this study, 720 experiments were performed using a hydraulic model to estimate the flow intercepted by a grate inlet on a road. The flow calculation considered the number of lanes (2-4), longitudinal slope of the road (2-10%), transverse slope of the gutter (2-10%), and design capacity (up to 30 years of rainfall). The experimental results revealed that the flow intercepted by a grate inlet increased with increasing transverse slope of the gutter or the inlet length, thereby increasing its interception efficiency. Intercepted flow estimation equation was derived by regression analysis, and the derived equation was found to be more accurate than an existing empirical equation. The derived equation can thus be used to determine the installation of drainage grate inlets more effectively.
确定合适的道路排水格栅安装间隔需要一个方程来估计每个格栅入口拦截的流量及其拦截效率。在这项研究中，使用液压模型进行了 720 次实验，以估计道路上格栅入口拦截的流量。流量计算考虑了车道数量（2-4）、道路纵坡（2-10%）、排水沟横向坡度（2-10%）和设计能力（可达 30 年降雨量）。实验结果表明，格栅入口拦截的流量随着排水沟或入口长度的横向坡度的增加而增加，从而提高了其拦截效率。通过回归分析得出了截留流量估算方程，发现该方程比现有的经验方程更准确。因此，该方程可用于更有效地确定排水格栅入口的安装位置。
