Research on regional evapotranspiration in the Zhangcheng area based on the SEBS model
Evapotranspiration (ET) is the main process of water and energy conversion in the hydrosphere, atmosphere and biosphere. Accurately estimation of ET is of great significance in ecological environment protection. The city of Chengde and Zhangjiakou, taken as the study area, is an important barrier fo...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Hydrogeology & Engineering Geology
2023-01-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202204007 |
| _version_ | 1811169528635195392 |
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| author | Xiangwang DONG Xiaomei JIN Xucai ZHANG Xiulan YIN Aifang JIN Jie LANG Xufu LUO Jingxuan MA |
| author_facet | Xiangwang DONG Xiaomei JIN Xucai ZHANG Xiulan YIN Aifang JIN Jie LANG Xufu LUO Jingxuan MA |
| author_sort | Xiangwang DONG |
| collection | DOAJ |
| description | Evapotranspiration (ET) is the main process of water and energy conversion in the hydrosphere, atmosphere and biosphere. Accurately estimation of ET is of great significance in ecological environment protection. The city of Chengde and Zhangjiakou, taken as the study area, is an important barrier for the ecological security of the Beijing-Tianjin-Hebei urban areas. There have been fewer studies of actual evapotranspiration for long-term sequences in the region. In this paper, the monthly actual ET in the study area from January, 2001 to December, 2020 is simulated based on the SEBS model using MODIS and GLDAS data. The SEBS results are compared with the MOD16A2 data in trend, and the field measurements on July 2021 are also used for validation at the pixel scale. The method of Sen+MannKendall test is used to analyze the temporal and spatial trend changes, and the correlation analysis was used to discuss the influencing factors on ET change. The results show that the monthly SEBS ET has a good correlation with the mod16A2 data, and the relative error with the field measurement is less than 15%. Therefore, the reliability of the SEBS result is validated to be relatively high. The actual ET of the study area has shown a fluctuating upward trend in the past 20 years. The maximum value of ET appeared in 2013 with the value of 545 mm, and the minimum value was 348 mm in 2002; and the evapotranspiration in Chengde was significantly higher than that in Zhangjiakou; In the past 20 years, the ET of 75.41% of the study area was basically stable, 5.13% of the area increased, 1.11% of the region was significantly decreased and 18.35% of the area was slightly decreased. The temperature and vegetation change have a significant positive correlation with evapotranspiration variation. The ET of different land use types is: forest land>water>grass land>arable land>construction land>unused land. |
| first_indexed | 2024-04-10T16:43:59Z |
| format | Article |
| id | doaj.art-0aad2450b11f452a8fd159af3e1beb83 |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:43:59Z |
| publishDate | 2023-01-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-0aad2450b11f452a8fd159af3e1beb832023-02-08T01:42:17ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652023-01-01501132010.16030/j.cnki.issn.1000-3665.202204007202204007Research on regional evapotranspiration in the Zhangcheng area based on the SEBS modelXiangwang DONG0Xiaomei JIN1Xucai ZHANG2Xiulan YIN3Aifang JIN4Jie LANG5Xufu LUO6Jingxuan MA7School of Water Resources and Environment, China University of Geosciences （Beijing）, Beijing 100083, ChinaSchool of Water Resources and Environment, China University of Geosciences （Beijing）, Beijing 100083, ChinaSchool of Water Resources and Environment, China University of Geosciences （Beijing）, Beijing 100083, ChinaChina Institute of Geo-Environment Monitoring, Beijing 100081, ChinaChina Institute of Geo-Environment Monitoring, Beijing 100081, ChinaSchool of Water Resources and Environment, China University of Geosciences （Beijing）, Beijing 100083, ChinaSchool of Water Resources and Environment, China University of Geosciences （Beijing）, Beijing 100083, ChinaSchool of Water Resources and Environment, China University of Geosciences （Beijing）, Beijing 100083, ChinaEvapotranspiration (ET) is the main process of water and energy conversion in the hydrosphere, atmosphere and biosphere. Accurately estimation of ET is of great significance in ecological environment protection. The city of Chengde and Zhangjiakou, taken as the study area, is an important barrier for the ecological security of the Beijing-Tianjin-Hebei urban areas. There have been fewer studies of actual evapotranspiration for long-term sequences in the region. In this paper, the monthly actual ET in the study area from January, 2001 to December, 2020 is simulated based on the SEBS model using MODIS and GLDAS data. The SEBS results are compared with the MOD16A2 data in trend, and the field measurements on July 2021 are also used for validation at the pixel scale. The method of Sen+MannKendall test is used to analyze the temporal and spatial trend changes, and the correlation analysis was used to discuss the influencing factors on ET change. The results show that the monthly SEBS ET has a good correlation with the mod16A2 data, and the relative error with the field measurement is less than 15%. Therefore, the reliability of the SEBS result is validated to be relatively high. The actual ET of the study area has shown a fluctuating upward trend in the past 20 years. The maximum value of ET appeared in 2013 with the value of 545 mm, and the minimum value was 348 mm in 2002; and the evapotranspiration in Chengde was significantly higher than that in Zhangjiakou; In the past 20 years, the ET of 75.41% of the study area was basically stable, 5.13% of the area increased, 1.11% of the region was significantly decreased and 18.35% of the area was slightly decreased. The temperature and vegetation change have a significant positive correlation with evapotranspiration variation. The ET of different land use types is: forest land>water>grass land>arable land>construction land>unused land.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202204007sebsevapotranspiration (et)sen+mannkendall testzhangjiakou-chengdecorrelation analysis |
| spellingShingle | Xiangwang DONG Xiaomei JIN Xucai ZHANG Xiulan YIN Aifang JIN Jie LANG Xufu LUO Jingxuan MA Research on regional evapotranspiration in the Zhangcheng area based on the SEBS model Shuiwen dizhi gongcheng dizhi sebs evapotranspiration (et) sen+mannkendall test zhangjiakou-chengde correlation analysis |
| title | Research on regional evapotranspiration in the Zhangcheng area based on the SEBS model |
| title_full | Research on regional evapotranspiration in the Zhangcheng area based on the SEBS model |
| title_fullStr | Research on regional evapotranspiration in the Zhangcheng area based on the SEBS model |
| title_full_unstemmed | Research on regional evapotranspiration in the Zhangcheng area based on the SEBS model |
| title_short | Research on regional evapotranspiration in the Zhangcheng area based on the SEBS model |
| title_sort | research on regional evapotranspiration in the zhangcheng area based on the sebs model |
| topic | sebs evapotranspiration (et) sen+mannkendall test zhangjiakou-chengde correlation analysis |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202204007 |
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