Applicability of the complementary relationship of evapotranspiration for heterogeneous vegetation cover at boundary and plot scales
Study region: Two boundary-scale watersheds (Yangjiagou and Dongzhuanggou) and three typical vegetation plots [a single plantation, a mixed plantation, and a natural grassland] in the Loess Plateau. Study focus: The performance of different Generalized Complementary Relationships (four versions of G...
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Elsevier
2025-02-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221458182400466X |
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| author | Chong Fu Xiaoyu Song Wanyin Wei Qi Zhang Lanjun Li Xinkai Zhao Pengfei Meng Long Wang Huaiyou Li |
| author_facet | Chong Fu Xiaoyu Song Wanyin Wei Qi Zhang Lanjun Li Xinkai Zhao Pengfei Meng Long Wang Huaiyou Li |
| author_sort | Chong Fu |
| collection | DOAJ |
| description | Study region: Two boundary-scale watersheds (Yangjiagou and Dongzhuanggou) and three typical vegetation plots [a single plantation, a mixed plantation, and a natural grassland] in the Loess Plateau. Study focus: The performance of different Generalized Complementary Relationships (four versions of GCR) in simulating actual evapotranspiration (ETa) at boundary (∼1 km2) and plot scales (much less than 1 km2) remains unclear, particularly under heterogeneous vegetation cover. Furthermore, the feasibility of using GCR directly to obtain accurate net ETa (ETan, the sum of soil evaporation and plant transpiration) through parameter calibration is investigated. The influence of timescale and vegetation diversity is also discussed. New hydrological insights for the region: Dynamic Scaling of the GCR could achieve high accuracy at boundary-scale watersheds (NSE=0.78) and different vegetation plots (NSE=0.79), indicating the universality and stability of the GCR, in line with the conclusions of previous large-scale studies. Reducing the timescale will decrease the GCR's simulation performance for both ETa and ETan. Interestingly, as vegetation heterogeneity increased, GCR's performance improved when simulating ETa but decreased when simulating ETan. Furthermore, using GCR to obtain ETan directly may generate bias near extreme points at a weekly timescale but becomes feasible at longer timescales. This study expanded recognition of GCR's performance under varying spatiotemporal scales and provided evidence for the possibility of simulating evapotranspiration components by the method. |
| format | Article |
| id | doaj-art-b4bc8d1d74ba4febbec466bf85b64f19 |
| institution | Kabale University |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-b4bc8d1d74ba4febbec466bf85b64f192025-01-22T05:42:05ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-02-0157102117Applicability of the complementary relationship of evapotranspiration for heterogeneous vegetation cover at boundary and plot scalesChong Fu0Xiaoyu Song1Wanyin Wei2Qi Zhang3Lanjun Li4Xinkai Zhao5Pengfei Meng6Long Wang7Huaiyou Li8State Key Laboratory of Eco–hydraulics in Northwest Arid Region of China (Xi’an University of Technology), Xi’an, Shaanxi 710048, ChinaState Key Laboratory of Eco–hydraulics in Northwest Arid Region of China (Xi’an University of Technology), Xi’an, Shaanxi 710048, China; Corresponding author.State Key Laboratory of Eco–hydraulics in Northwest Arid Region of China (Xi’an University of Technology), Xi’an, Shaanxi 710048, ChinaState Key Laboratory of Eco–hydraulics in Northwest Arid Region of China (Xi’an University of Technology), Xi’an, Shaanxi 710048, ChinaState Key Laboratory of Eco–hydraulics in Northwest Arid Region of China (Xi’an University of Technology), Xi’an, Shaanxi 710048, ChinaState Key Laboratory of Eco–hydraulics in Northwest Arid Region of China (Xi’an University of Technology), Xi’an, Shaanxi 710048, ChinaState Key Laboratory of Eco–hydraulics in Northwest Arid Region of China (Xi’an University of Technology), Xi’an, Shaanxi 710048, ChinaState Key Laboratory of Eco–hydraulics in Northwest Arid Region of China (Xi’an University of Technology), Xi’an, Shaanxi 710048, ChinaXifeng Experiment Station of Soil and Water Conservation, Yellow River Conservancy Committee, Qingyang, Gansu 745000, ChinaStudy region: Two boundary-scale watersheds (Yangjiagou and Dongzhuanggou) and three typical vegetation plots [a single plantation, a mixed plantation, and a natural grassland] in the Loess Plateau. Study focus: The performance of different Generalized Complementary Relationships (four versions of GCR) in simulating actual evapotranspiration (ETa) at boundary (∼1 km2) and plot scales (much less than 1 km2) remains unclear, particularly under heterogeneous vegetation cover. Furthermore, the feasibility of using GCR directly to obtain accurate net ETa (ETan, the sum of soil evaporation and plant transpiration) through parameter calibration is investigated. The influence of timescale and vegetation diversity is also discussed. New hydrological insights for the region: Dynamic Scaling of the GCR could achieve high accuracy at boundary-scale watersheds (NSE=0.78) and different vegetation plots (NSE=0.79), indicating the universality and stability of the GCR, in line with the conclusions of previous large-scale studies. Reducing the timescale will decrease the GCR's simulation performance for both ETa and ETan. Interestingly, as vegetation heterogeneity increased, GCR's performance improved when simulating ETa but decreased when simulating ETan. Furthermore, using GCR to obtain ETan directly may generate bias near extreme points at a weekly timescale but becomes feasible at longer timescales. This study expanded recognition of GCR's performance under varying spatiotemporal scales and provided evidence for the possibility of simulating evapotranspiration components by the method.http://www.sciencedirect.com/science/article/pii/S221458182400466XEvapotranspiration simulation performanceGeneralized complementary relationshipLoess plateauSpatial scalesTemporal scalesVegetation diversity |
| spellingShingle | Chong Fu Xiaoyu Song Wanyin Wei Qi Zhang Lanjun Li Xinkai Zhao Pengfei Meng Long Wang Huaiyou Li Applicability of the complementary relationship of evapotranspiration for heterogeneous vegetation cover at boundary and plot scales Journal of Hydrology: Regional Studies Evapotranspiration simulation performance Generalized complementary relationship Loess plateau Spatial scales Temporal scales Vegetation diversity |
| title | Applicability of the complementary relationship of evapotranspiration for heterogeneous vegetation cover at boundary and plot scales |
| title_full | Applicability of the complementary relationship of evapotranspiration for heterogeneous vegetation cover at boundary and plot scales |
| title_fullStr | Applicability of the complementary relationship of evapotranspiration for heterogeneous vegetation cover at boundary and plot scales |
| title_full_unstemmed | Applicability of the complementary relationship of evapotranspiration for heterogeneous vegetation cover at boundary and plot scales |
| title_short | Applicability of the complementary relationship of evapotranspiration for heterogeneous vegetation cover at boundary and plot scales |
| title_sort | applicability of the complementary relationship of evapotranspiration for heterogeneous vegetation cover at boundary and plot scales |
| topic | Evapotranspiration simulation performance Generalized complementary relationship Loess plateau Spatial scales Temporal scales Vegetation diversity |
| url | http://www.sciencedirect.com/science/article/pii/S221458182400466X |
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