Preprints
https://doi.org/10.5194/hess-2021-412
https://doi.org/10.5194/hess-2021-412

  09 Aug 2021

09 Aug 2021

Review status: a revised version of this preprint is currently under review for the journal HESS.

The Impact of Wind on the Rainfall-Runoff Relationship in Urban High-Rise Building Areas

Xichao Gao1,2, Zhiyong Yang1, Dawei Han2, Kai Gao1, and Qian Zhu3 Xichao Gao et al.
  • 1State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
  • 2Department of Civil Engineering, University of Bristol, BS8 1TR, UK
  • 3School of Civil Engineering, Southeast University, Nanjing, 211189, China

Abstract. Wind drift has a significant influence on the rainfall-runoff relationship in urban high-rise building areas since the oblique rainfall caused by the wind drift can interact with the building walls. However, the impact of the rainfall inclination angle on the rainfall-runoff process in urban high-rise building areas has not been studied. In this study, the relationship between wind and the rainfall-runoff process in such areas was explored. A theoretical framework was developed to describe their relationship, including a computational fluid dynamics (CFD) method to obtain the relationship between wind speed and rainfall inclination and a newly derived equation to describe the relationship between rainfall inclination and the runoff coefficient. Subsequently, a laboratory scale model experiment was conducted to verify the proposed framework. The main results are that (1) the runoff coefficient calculated by the proposed theoretical framework is highly consistent with that obtained from the laboratory experiment; (2) the runoff coefficient of urban high-rise building areas increases with wind speed; (3) the change of the runoff coefficient for the experiment with larger raindrop is 0.047 when the wind speed increases from 0 to 5.9 m/s while that for the experiment with smaller raindrop is 0.064, which means that the rainfall with larger droplets is less influenced by the wind.

Xichao Gao et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on hess-2021-412', Eunsaem Cho, 11 Aug 2021
    • AC1: 'Reply on CC1', Xichao Gao, 07 Sep 2021
  • RC1: 'Comment on hess-2021-412', Anonymous Referee #1, 07 Sep 2021
  • RC2: 'Comment on hess-2021-412', Anonymous Referee #2, 12 Sep 2021

Xichao Gao et al.

Xichao Gao et al.

Viewed

Total article views: 391 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
307 68 16 391 1 4
  • HTML: 307
  • PDF: 68
  • XML: 16
  • Total: 391
  • BibTeX: 1
  • EndNote: 4
Views and downloads (calculated since 09 Aug 2021)
Cumulative views and downloads (calculated since 09 Aug 2021)

Viewed (geographical distribution)

Total article views: 325 (including HTML, PDF, and XML) Thereof 325 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 24 Oct 2021
Download
Short summary
We proposed a theoretical framework and conducted a laboratory experiment to understand the relationship between wind and the rainfall-runoff process in urban high-rise building areas. The runoff coefficient (relating the amount of runoff to the amount of precipitation received) found in the theoretical framework was close to that found in the laboratory experiment.