Derivation and Validation of a Theoretical Canopy Interception Model Based on Raindrop Microphysical Processes
Abstract Canopy interception represents the initial phase of rainfall redistribution across the land surface and is crucial for hydrological and ecological processes. This study proposes a novel theoretical model of canopy interception based on the microphysical processes of raindrops within the can...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-06-01
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| Series: | Water Resources Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2024WR038296 |
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| Summary: | Abstract Canopy interception represents the initial phase of rainfall redistribution across the land surface and is crucial for hydrological and ecological processes. This study proposes a novel theoretical model of canopy interception based on the microphysical processes of raindrops within the canopy. The model incorporates physical parameters pertinent to canopy characteristics, such as the attachment retention coefficient and the pinning proportion coefficient. Both the basic and simplified model forms of canopy interception during rainfall events have been derived. Further elaborations of the model account for stem flow, the surface evaporation during rainfall, and other conditions. The model parameters are clearly defined, physically meaningful, and can be directly estimated using detailed canopy structure data. This estimation process is now more feasible than ever due to advances in high‐resolution lidar technology. Simulated rainfall experiments were conducted to validate the movement patterns of raindrops in the canopy, establish model parameters, validate the models' accuracy, and compare the applicability of the two model forms. |
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| ISSN: | 0043-1397 1944-7973 |