The impact of wind on the rainfall–runoff relationship in urban high-rise building areas
<p>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 urba...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2021-11-01
|
| Series: | Hydrology and Earth System Sciences |
| Online Access: | https://hess.copernicus.org/articles/25/6023/2021/hess-25-6023-2021.pdf |
| _version_ | 1818722723114778624 |
|---|---|
| author | X. Gao X. Gao Z. Yang D. Han K. Gao Q. Zhu |
| author_facet | X. Gao X. Gao Z. Yang D. Han K. Gao Q. Zhu |
| author_sort | X. Gao |
| collection | DOAJ |
| description | <p>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 has been 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 and the increase
rate is linear with the tangent of the rainfall inclination angle, and (3) the change in the runoff coefficient for the experiment with larger raindrop is
0.047 when the wind speed increases from 0 to 5.9 <span class="inline-formula">m s<sup>−1</sup></span>, 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.</p> |
| first_indexed | 2024-12-17T20:59:09Z |
| format | Article |
| id | doaj.art-4cadc3ba9b4a480ab28bafbecd9b38e0 |
| institution | Directory Open Access Journal |
| issn | 1027-5606 1607-7938 |
| language | English |
| last_indexed | 2024-12-17T20:59:09Z |
| publishDate | 2021-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Hydrology and Earth System Sciences |
| spelling | doaj.art-4cadc3ba9b4a480ab28bafbecd9b38e02022-12-21T21:32:47ZengCopernicus PublicationsHydrology and Earth System Sciences1027-56061607-79382021-11-01256023603910.5194/hess-25-6023-2021The impact of wind on the rainfall–runoff relationship in urban high-rise building areasX. Gao0X. Gao1Z. Yang2D. Han3K. Gao4Q. Zhu5State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, ChinaDepartment of Civil Engineering, University of Bristol, Bristol, BS8 1TR, UKState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, ChinaDepartment of Civil Engineering, University of Bristol, Bristol, BS8 1TR, UKState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, ChinaSchool of Civil Engineering, Southeast University, Nanjing, 211189, China<p>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 has been 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 and the increase rate is linear with the tangent of the rainfall inclination angle, and (3) the change in the runoff coefficient for the experiment with larger raindrop is 0.047 when the wind speed increases from 0 to 5.9 <span class="inline-formula">m s<sup>−1</sup></span>, 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.</p>https://hess.copernicus.org/articles/25/6023/2021/hess-25-6023-2021.pdf |
| spellingShingle | X. Gao X. Gao Z. Yang D. Han K. Gao Q. Zhu The impact of wind on the rainfall–runoff relationship in urban high-rise building areas Hydrology and Earth System Sciences |
| title | The impact of wind on the rainfall–runoff relationship in urban high-rise building areas |
| title_full | The impact of wind on the rainfall–runoff relationship in urban high-rise building areas |
| title_fullStr | The impact of wind on the rainfall–runoff relationship in urban high-rise building areas |
| title_full_unstemmed | The impact of wind on the rainfall–runoff relationship in urban high-rise building areas |
| title_short | The impact of wind on the rainfall–runoff relationship in urban high-rise building areas |
| title_sort | impact of wind on the rainfall runoff relationship in urban high rise building areas |
| url | https://hess.copernicus.org/articles/25/6023/2021/hess-25-6023-2021.pdf |
| work_keys_str_mv | AT xgao theimpactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT xgao theimpactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT zyang theimpactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT dhan theimpactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT kgao theimpactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT qzhu theimpactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT xgao impactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT xgao impactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT zyang impactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT dhan impactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT kgao impactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas AT qzhu impactofwindontherainfallrunoffrelationshipinurbanhighrisebuildingareas |