This study examines the hydrologic performance of conventional and low-impact development (LID) stormwater approaches when implemented as retrofit measures in a highly urbanised catchment (10.23 km²). A hydrologic-hydrodynamic model was proposed to simulate different implementation scenarios. Rainfall data and downstream water level observations between 01/2016 and 02/2019 were used to calibrate and validate (0.77$\le$NSE$\le$0.97) the model for the current situation. The simulation of stormwater control, as indicated in the municipal regulation, involving on-site retention tanks at a lot scale, led to peak flow reductions of 5% for a 10-year design storm event. When the number of dwelling owners subjected to comply with the control measures was increased, a peak flow reduction of 18% for the same event was reached. Modelling tools can guide policy and rule-making processes from a catchment management perspective, supporting the evaluation and improvement of strategies adopted in urban stormwater management.

本研究考察了在高度城市化的集水区（10.23 km ²）中作为改造措施实施的常规和低影响开发（LID）雨水方法的水文性能。提出了一种水文-水动力模型来模拟不同的实施方案。使用01/2016和02/2019之间的降雨数据和下游水位观测值进行校准和验证（0.77$\le$NSE$\le$0.97）针对当前情况的模型。根据市政法规的指示，对雨水控制的模拟涉及大量的现场储水罐，导致10年设计暴雨事件的峰值流量减少了5％。当增加遵守控制措施的居民的数量时，同一事件的峰值流量减少了18％。建模工具可以从集水区管理的角度指导政策和规则制定过程，支持对城市雨水管理中采用的策略进行评估和改进。