Impact of urbanization on rainfall-runoff processes: case study in the Liangshui River Basin in Beijing, China
China is undergoing rapid urbanization during the past decades. For example, the proportion of urban population in Beijing has increased from 57.6 % in 1980 to 86.3 % in 2013. Rapid urbanization has an adverse impact on the urban rainfall-runoff processes, which may result in the increase of urb...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-05-01
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| Series: | Proceedings of the International Association of Hydrological Sciences |
| Online Access: | https://www.proc-iahs.net/373/7/2016/piahs-373-7-2016.pdf |
| _version_ | 1811307777930297344 |
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| author | Z. Xu Z. Xu G. Zhao G. Zhao |
| author_facet | Z. Xu Z. Xu G. Zhao G. Zhao |
| author_sort | Z. Xu |
| collection | DOAJ |
| description | China is undergoing rapid urbanization during the past
decades. For example, the proportion of urban population in Beijing has
increased from 57.6 % in 1980 to 86.3 % in 2013. Rapid urbanization has
an adverse impact on the urban rainfall-runoff processes, which may result
in the increase of urban flood risk. In the present study, the major purpose
is to investigate the impact of land use/cover change on hydrological
processes. The intensive human activities, such as the increase of
impervious area, changes of river network morphology, construction of
drainage system and water transfer, were considered in this study. Landsat
TM images were adopted to monitor urbanization process based on Urban
Land-use Index (ULI). The SWMM model considering different urbanized
scenarios and anthropogenic disturbance was developed. The measured
streamflow data was used for model calibration and validation. Precipitation
with different return periods was taken as model input to analyse the
changes of flood characteristics under different urbanized scenarios. The
results indicated that SWMM provided a good estimation for storms under
different urbanized scenarios. The volume of surface runoff after
urbanization was 3.5 times greater than that before urbanization; the
coefficient of runoff changed from 0.12 to 0.41, and the ratio of
infiltration decreased from 88 to 60 %. After urbanization, the time
of overland flow concentration increased while the time of river
concentration decreased; the peak time did not show much difference in this
study. It was found that the peak flow of 20-year return-period after
urbanization is greater than that of 100-year return-period before
urbanization. The amplification effect of urbanization on flood is
significant, resulting in an increase of the flooding risk. These effects
are especially noticeable for extreme precipitation. The results in this
study will provide technical support for the planning and management of
urban storm water and the evaluation on Low Impact Development (LID)
measures. |
| first_indexed | 2024-04-13T09:10:14Z |
| format | Article |
| id | doaj.art-b5fec78910ad4fabb3202c72b88f630c |
| institution | Directory Open Access Journal |
| issn | 2199-8981 2199-899X |
| language | English |
| last_indexed | 2024-04-13T09:10:14Z |
| publishDate | 2016-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Proceedings of the International Association of Hydrological Sciences |
| spelling | doaj.art-b5fec78910ad4fabb3202c72b88f630c2022-12-22T02:52:53ZengCopernicus PublicationsProceedings of the International Association of Hydrological Sciences2199-89812199-899X2016-05-0137371210.5194/piahs-373-7-2016Impact of urbanization on rainfall-runoff processes: case study in the Liangshui River Basin in Beijing, ChinaZ. Xu0Z. Xu1G. Zhao2G. Zhao3College of Water Sciences, Beijing Normal University, Beijing 100875, ChinaKey Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100875, ChinaCollege of Water Sciences, Beijing Normal University, Beijing 100875, ChinaKey Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100875, ChinaChina is undergoing rapid urbanization during the past decades. For example, the proportion of urban population in Beijing has increased from 57.6 % in 1980 to 86.3 % in 2013. Rapid urbanization has an adverse impact on the urban rainfall-runoff processes, which may result in the increase of urban flood risk. In the present study, the major purpose is to investigate the impact of land use/cover change on hydrological processes. The intensive human activities, such as the increase of impervious area, changes of river network morphology, construction of drainage system and water transfer, were considered in this study. Landsat TM images were adopted to monitor urbanization process based on Urban Land-use Index (ULI). The SWMM model considering different urbanized scenarios and anthropogenic disturbance was developed. The measured streamflow data was used for model calibration and validation. Precipitation with different return periods was taken as model input to analyse the changes of flood characteristics under different urbanized scenarios. The results indicated that SWMM provided a good estimation for storms under different urbanized scenarios. The volume of surface runoff after urbanization was 3.5 times greater than that before urbanization; the coefficient of runoff changed from 0.12 to 0.41, and the ratio of infiltration decreased from 88 to 60 %. After urbanization, the time of overland flow concentration increased while the time of river concentration decreased; the peak time did not show much difference in this study. It was found that the peak flow of 20-year return-period after urbanization is greater than that of 100-year return-period before urbanization. The amplification effect of urbanization on flood is significant, resulting in an increase of the flooding risk. These effects are especially noticeable for extreme precipitation. The results in this study will provide technical support for the planning and management of urban storm water and the evaluation on Low Impact Development (LID) measures.https://www.proc-iahs.net/373/7/2016/piahs-373-7-2016.pdf |
| spellingShingle | Z. Xu Z. Xu G. Zhao G. Zhao Impact of urbanization on rainfall-runoff processes: case study in the Liangshui River Basin in Beijing, China Proceedings of the International Association of Hydrological Sciences |
| title | Impact of urbanization on rainfall-runoff processes: case study in the Liangshui River Basin in Beijing, China |
| title_full | Impact of urbanization on rainfall-runoff processes: case study in the Liangshui River Basin in Beijing, China |
| title_fullStr | Impact of urbanization on rainfall-runoff processes: case study in the Liangshui River Basin in Beijing, China |
| title_full_unstemmed | Impact of urbanization on rainfall-runoff processes: case study in the Liangshui River Basin in Beijing, China |
| title_short | Impact of urbanization on rainfall-runoff processes: case study in the Liangshui River Basin in Beijing, China |
| title_sort | impact of urbanization on rainfall runoff processes case study in the liangshui river basin in beijing china |
| url | https://www.proc-iahs.net/373/7/2016/piahs-373-7-2016.pdf |
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