Accessible Remote Sensing Data Mining Based Dew Estimation
Dew has been considered a supplementary water resource as it constitutes an important water supply in many ecosystems, especially in arid and semiarid areas. Remote sensing allows large-scale surface observations, offering the possibility to estimate dew in such arid and semiarid regions. In this st...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/22/5653 |
| _version_ | 1797464096070696960 |
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| author | Ying Suo Zhongjing Wang Zixiong Zhang Steven R. Fassnacht |
| author_facet | Ying Suo Zhongjing Wang Zixiong Zhang Steven R. Fassnacht |
| author_sort | Ying Suo |
| collection | DOAJ |
| description | Dew has been considered a supplementary water resource as it constitutes an important water supply in many ecosystems, especially in arid and semiarid areas. Remote sensing allows large-scale surface observations, offering the possibility to estimate dew in such arid and semiarid regions. In this study, by screening and combining different remote sensing variables, we obtained a well-performing monthly scale dew yield estimation model based on the support vector machine (SVM) learning method. Using daytime and nighttime land surface temperatures (LST), the normalized difference vegetation index (NDVI), and three emissivity bands (3.929–3.989 µm, 10.780–11.280 µm, and 11.770–12.270 µm) as the model inputs, the simulated site-scale monthly dew yield achieved a correlation coefficient (CC) of 0.89 and a root mean square error (RMSE) of 0.30 (mm) for the training set, and CC = 0.59 and RMSE = 0.55 (mm) for the test set. Applying the model to the Heihe River Basin (HRB), the results showed that the annual dew yield ranged from 8.83 to 20.28 mm/year, accounting for 2.12 to 66.88% of the total precipitation, with 74.81% of the area having an annual dew amount of 16 to 19 mm/year. We expanded the model application to Northwest China and obtained a dew yield of 5~30 mm/year from 2011 to 2020, indicating that dew is a non-negligible part of the water balance in this arid area. As a non-negligible part of the water cycle, the use of remote sensing to estimate dew can provide better support for future water resource assessment and analysis. |
| first_indexed | 2024-03-09T18:02:03Z |
| format | Article |
| id | doaj.art-7130bf2ee0b94221a6ed38d04746b18e |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T18:02:03Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-7130bf2ee0b94221a6ed38d04746b18e2023-11-24T09:48:24ZengMDPI AGRemote Sensing2072-42922022-11-011422565310.3390/rs14225653Accessible Remote Sensing Data Mining Based Dew EstimationYing Suo0Zhongjing Wang1Zixiong Zhang2Steven R. Fassnacht3Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, ChinaDepartment of Hydraulic Engineering, Tsinghua University, Beijing 100084, ChinaDepartment of Hydraulic Engineering, Tsinghua University, Beijing 100084, ChinaESS-Watershed Science, Colorado State University, Fort Collins, CO 80523-1476, USADew has been considered a supplementary water resource as it constitutes an important water supply in many ecosystems, especially in arid and semiarid areas. Remote sensing allows large-scale surface observations, offering the possibility to estimate dew in such arid and semiarid regions. In this study, by screening and combining different remote sensing variables, we obtained a well-performing monthly scale dew yield estimation model based on the support vector machine (SVM) learning method. Using daytime and nighttime land surface temperatures (LST), the normalized difference vegetation index (NDVI), and three emissivity bands (3.929–3.989 µm, 10.780–11.280 µm, and 11.770–12.270 µm) as the model inputs, the simulated site-scale monthly dew yield achieved a correlation coefficient (CC) of 0.89 and a root mean square error (RMSE) of 0.30 (mm) for the training set, and CC = 0.59 and RMSE = 0.55 (mm) for the test set. Applying the model to the Heihe River Basin (HRB), the results showed that the annual dew yield ranged from 8.83 to 20.28 mm/year, accounting for 2.12 to 66.88% of the total precipitation, with 74.81% of the area having an annual dew amount of 16 to 19 mm/year. We expanded the model application to Northwest China and obtained a dew yield of 5~30 mm/year from 2011 to 2020, indicating that dew is a non-negligible part of the water balance in this arid area. As a non-negligible part of the water cycle, the use of remote sensing to estimate dew can provide better support for future water resource assessment and analysis.https://www.mdpi.com/2072-4292/14/22/5653dew estimationmachine learningremote sensingNorthwest China |
| spellingShingle | Ying Suo Zhongjing Wang Zixiong Zhang Steven R. Fassnacht Accessible Remote Sensing Data Mining Based Dew Estimation Remote Sensing dew estimation machine learning remote sensing Northwest China |
| title | Accessible Remote Sensing Data Mining Based Dew Estimation |
| title_full | Accessible Remote Sensing Data Mining Based Dew Estimation |
| title_fullStr | Accessible Remote Sensing Data Mining Based Dew Estimation |
| title_full_unstemmed | Accessible Remote Sensing Data Mining Based Dew Estimation |
| title_short | Accessible Remote Sensing Data Mining Based Dew Estimation |
| title_sort | accessible remote sensing data mining based dew estimation |
| topic | dew estimation machine learning remote sensing Northwest China |
| url | https://www.mdpi.com/2072-4292/14/22/5653 |
| work_keys_str_mv | AT yingsuo accessibleremotesensingdataminingbaseddewestimation AT zhongjingwang accessibleremotesensingdataminingbaseddewestimation AT zixiongzhang accessibleremotesensingdataminingbaseddewestimation AT stevenrfassnacht accessibleremotesensingdataminingbaseddewestimation |