Land Use Change in Zhengzhou during 2000—2021 and Its Impact on Comprehensive Runoff Coefficient
Flood disasters are a prominent water safety problem for the major cities in China.Land use change has a great impact on the formation of flood disasters,and the comprehensive runoff coefficient is an important factor in response to the hydrological process of floods.Therefore,studying land use chan...
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2022-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails?columnId=47641029&Fpath=home&index=0 |
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| Summary: | Flood disasters are a prominent water safety problem for the major cities in China.Land use change has a great impact on the formation of flood disasters,and the comprehensive runoff coefficient is an important factor in response to the hydrological process of floods.Therefore,studying land use change and its impact on the comprehensive runoff coefficient is of great significance.With land use classification data from three phases of Landsat remote sensing images of Zhengzhou for 2000—2021,the spatio-temporal evolution characteristics of land use in Zhengzhou were analyzed,and the regional comprehensive runoff coefficient and the urban ground hardening rate were calculated.The following observations could be made from the results:① The land use in Zhengzhou underwent drastic changes during 2000—2021.Specifically,the area of construction land increased by 1 425.97 km<sup>2</sup>,while those of forest/grassland and cultivated land decreased by 777.25 km<sup>2</sup> and 810.88 km<sup>2</sup>,respectively.② The percentage of the total area of land use conversion in Zhengzhou during 2000—2021 was 43.39%,and the conversion mainly took place among cultivated land,forest/grassland,and construction land.During the period of 2000—2014,the land use conversion was mainly from cultivated land and forest/grassland to construction land and from forest/grassland to cultivated land.During the period of 2014—2021,it was mainly from cultivated land to forest/grassland and construction land and from forest/grassland and construction land to cultivated land.③ During 2000—2021,the urban ground hardening rate of Zhengzhou increased from 12.32% to 31.14%,and its comprehensive runoff coefficient grew from 0.24 to 0.40. |
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| ISSN: | 1001-9235 |