Mai et al. (2026) A Watershed-Scale Analysis of Integrated Stormwater Control: Quantifying the Contributions of Blue-Green Infrastructure

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Land
• Year: 2026
• Date: 2026-01-10
• Authors: Yepeng Mai, Xueliang Ma, Zibin Deng, Biqiu Zeng, Hehai Xie
• DOI: 10.3390/land15010144

Research Groups

Not explicitly stated in the provided paper text.

Short Summary

This study evaluates the stormwater control performance of integrated blue-green infrastructure strategies in the Baihuayong watershed, finding that a synergistic combination of low reservoir storage, low river levels, and high green infrastructure yields the most comprehensive flood resilience improvements.

Objective

• To evaluate the stormwater control performance of combined initial reservoir storage level regulation, river water level adjustment, and green infrastructure implementation in an urban watershed under various rainfall events.

Study Configuration

• Spatial Scale: Baihuayong watershed, Guangzhou, China (42.4 km²)
• Temporal Scale: Rainfall events with return periods from 2 years to 100 years

Methodology and Data

• Models used: Coupled Storm Water Management Model (SWMM) and TELEMAC-2D
• Data sources: Simulated scenarios varying initial reservoir storage levels (30.6 m to 27.6 m), river water levels (11 m to 8 m), and green infrastructure proportions (0% to 45%).

Main Results

• Lowering initial reservoir storage levels from 30.6 m to 27.6 m enhanced runoff reduction by approximately 40% and reduced discharged water volume by approximately 30%.
• Decreasing river water levels from 11 m to 8 m reduced flooded areas by up to 8.3%.
• Increasing green infrastructure coverage from 0% to 45% reduced overflow nodes from 236 to 192 and flood extent from 10.76 ha to 9.20 ha under moderate storms.
• A synergistic configuration, combining a low initial reservoir storage level (27.6 m), low river water level (8 m), and a high green infrastructure proportion (35% to 45%), achieved the most comprehensive improvements in stormwater control.

Contributions

• Demonstrates the strong potential of integrated blue-green infrastructure for watershed-scale flood resilience.
• Provides quantitative guidance for sponge city planning by evaluating the synergistic effects of multiple stormwater control strategies.

Funding

Not available in the provided paper text.

Citation

@article{Mai2026WatershedScale,
  author = {Mai, Yepeng and Ma, Xueliang and Deng, Zibin and Zeng, Biqiu and Xie, Hehai},
  title = {A Watershed-Scale Analysis of Integrated Stormwater Control: Quantifying the Contributions of Blue-Green Infrastructure},
  journal = {Land},
  year = {2026},
  doi = {10.3390/land15010144},
  url = {https://doi.org/10.3390/land15010144}
}