Volume 35, Issue 3 e14091
RESEARCH ARTICLE

Exploring the stemflow dynamics and driving factors at both inter- and intra-event scales in a typical subtropical deciduous forest

Haixia Zhang

Haixia Zhang

Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China

Chuzhou Scientific Hydrology Laboratory, Nanjing Hydraulic Research Institute, Chuzhou, China

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Congsheng Fu

Corresponding Author

Congsheng Fu

Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China

Correspondence

Congsheng Fu, Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.

Email: [email protected]

Aimin Liao, Chuzhou Scientific Hydrology Laboratory, Nanjing Hydraulic Research Institute, Chuzhou, 239080, China.

Email: [email protected]

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Aimin Liao

Corresponding Author

Aimin Liao

Chuzhou Scientific Hydrology Laboratory, Nanjing Hydraulic Research Institute, Chuzhou, China

Correspondence

Congsheng Fu, Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.

Email: [email protected]

Aimin Liao, Chuzhou Scientific Hydrology Laboratory, Nanjing Hydraulic Research Institute, Chuzhou, 239080, China.

Email: [email protected]

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Can Zhang

Can Zhang

State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Science, Nanjing, China

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Jiufu Liu

Jiufu Liu

Chuzhou Scientific Hydrology Laboratory, Nanjing Hydraulic Research Institute, Chuzhou, China

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Niu Wang

Niu Wang

Chuzhou Scientific Hydrology Laboratory, Nanjing Hydraulic Research Institute, Chuzhou, China

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Bin He

Bin He

National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangdong Academy of Sciences, Guangzhou, China

Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China

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First published: 14 February 2021
Citations: 7
Funding information National Key R&D Program of China, Grant/Award Number: 2019YFA0607100; National Natural Science Foundation of China, Grant/Award Numbers: 41971044, 51609145, 91847301; NIGLAS startup project for introducing talents, Grant/Award Number: Y7SL041001; Pioneer Hundred Talent Program, Chinese Academy of Sciences, Grant/Award Number: Y7BR021001

Abstract

Numerous efforts have been made to understand stemflow dynamics under different types of vegetation at the inter-event scale, but few studies have explored the stemflow characteristics and corresponding influencing factors at the intra-event scale. An in-depth investigation of the inter- and intra-event dynamics of stemflow is important for understanding the ecohydrological processes in forest ecosystems. In this study, stemflow volume (FV), stemflow funnelling ratio (FR), and stemflow ratio (F%) from Quercus acutissima and Broussonetia papyrifera trees were measured at both inter- and intra-event scales in a subtropical deciduous forest, and the driving factors, including tree species and meteorological factors were further explored. Specifically, the FV, FR and F% of Q. acutissima (52.3 L, 47.2, 9.6%) were lower than those of B. papyrifera (85.1 L, 91.2, 12.4%). The effect of tree species on FV and F% was more obvious under low intensity rainfall types. At the inter-event scale, FV had a strong positive linear correlation with rainfall amount (GP) and event duration (DE) for both tree species, whereas FR and F% had a positive logarithmic correlation with GP and DE only under high-intensity, short-duration rainfall type. FR and F% were mainly affected by wind speed and the maximum 30-min rainfall intensity under low-intensity, long-duration rainfall type. At the intra-event scale, for both tree species, the mean lag time between the start of rainfall and stemflow was the shortest under high-intensity, short-duration rainfall type, while the mean duration and amount of stemflow after rain cessation were the greatest under high-amount, long-duration rainfall type. The relationship between stemflow intensity and rainfall intensity at the 5-min interval scale also depended greatly on rainfall type. These findings can help clarify stemflow dynamics and driving factors at both inter- and intra-event scales, and also provide abundant data and parameters for ecohydrological simulations in subtropical forests.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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