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Integrated effects of rainfall regime and canopy structure on interception loss: A comparative modelling analysis for an artificial larch forest.

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Title: Integrated effects of rainfall regime and canopy structure on interception loss: A comparative modelling analysis for an artificial larch forest.
Authors: Tu, Lihui1 (AUTHOR), Xiong, Wei2 (AUTHOR) xwcaf@163.com, Wang, Yanhui1 (AUTHOR), Yu, Pengtao1 (AUTHOR), Liu, Zebin1 (AUTHOR), Han, Xinsheng3 (AUTHOR), Yu, Yipeng1 (AUTHOR), Shi, Zhongjie2 (AUTHOR), Guo, Hao2 (AUTHOR), Li, Zhenhua4 (AUTHOR), Wang, Xiao1 (AUTHOR), Xu, Lihong1 (AUTHOR)
Source: Ecohydrology. Jun2021, Vol. 14 Issue 4, p1-15. 15p.
Subject Terms: *Growing season, Leaf area index, Larches, Structural dynamics
Geographic Terms: China
Abstract: Model optimization is essential for accurately simulating rainfall interception loss (I) in artificial forests and for quantifying the influence of canopy structure, rainfall regime, and meteorological variables on I. Herein, the revised Gash (addressing physical mechanisms) and Wang (addressing canopy structural impacts) models were used for comparative I simulations using a larch plantation in NW China. We used throughfall (Tf) and stemflow (Sf) measurements from the growing seasons of three consecutive years and found that from the total rainfall measured (1371.6 mm) in 59 selected rain events, Tf, Sf, and I accounted for 80.8%, 1.6%, and 17.6%, respectively. Surprisingly, the two tested models showed similar behaviours in their I simulations, with their performances classified as "very good," exhibiting 5% and 2.3% cumulative I relative errors for the revised Gash and Wang models, respectively. We noted that, although I was well simulated for light–moderate rain events (<25 mm), absolute errors increased significantly as rainfall amount and duration increased, owing to the constant evaporation rate applied in the models. Leaf area index (LAI) explained 40% of the water detention variation in the canopy, rather than I, which only reflected canopy storage capacity dynamics during the growing season. Collectively, our results revealed that models only addressing the independent impact of wet evaporation or structural dynamics are inadequate for accurately simulating I during heavy rain events (>25 mm). Therefore, future models should account for the potential errors arising from evaporation estimation and consider the effects of LAI. [ABSTRACT FROM AUTHOR]
Copyright of Ecohydrology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Integrated effects of rainfall regime and canopy structure on interception loss: A comparative modelling analysis for an artificial larch forest.
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Ecohydrology%22&quot;&gt;Ecohydrology&lt;/searchLink&gt;. Jun2021, Vol. 14 Issue 4, p1-15. 15p.
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  Data: *&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Growing+season%22&quot;&gt;Growing season&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Leaf+area+index%22&quot;&gt;Leaf area index&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Larches%22&quot;&gt;Larches&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Structural+dynamics%22&quot;&gt;Structural dynamics&lt;/searchLink&gt;
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  Data: Model optimization is essential for accurately simulating rainfall interception loss (I) in artificial forests and for quantifying the influence of canopy structure, rainfall regime, and meteorological variables on I. Herein, the revised Gash (addressing physical mechanisms) and Wang (addressing canopy structural impacts) models were used for comparative I simulations using a larch plantation in NW China. We used throughfall (Tf) and stemflow (Sf) measurements from the growing seasons of three consecutive years and found that from the total rainfall measured (1371.6 mm) in 59 selected rain events, Tf, Sf, and I accounted for 80.8%, 1.6%, and 17.6%, respectively. Surprisingly, the two tested models showed similar behaviours in their I simulations, with their performances classified as &quot;very good,&quot; exhibiting 5% and 2.3% cumulative I relative errors for the revised Gash and Wang models, respectively. We noted that, although I was well simulated for light–moderate rain events (&lt;25 mm), absolute errors increased significantly as rainfall amount and duration increased, owing to the constant evaporation rate applied in the models. Leaf area index (LAI) explained 40% of the water detention variation in the canopy, rather than I, which only reflected canopy storage capacity dynamics during the growing season. Collectively, our results revealed that models only addressing the independent impact of wet evaporation or structural dynamics are inadequate for accurately simulating I during heavy rain events (&gt;25 mm). Therefore, future models should account for the potential errors arising from evaporation estimation and consider the effects of LAI. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Ecohydrology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1002/eco.2283
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      – Code: eng
        Text: English
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        PageCount: 15
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    Subjects:
      – SubjectFull: Growing season
        Type: general
      – SubjectFull: Leaf area index
        Type: general
      – SubjectFull: Larches
        Type: general
      – SubjectFull: Structural dynamics
        Type: general
      – SubjectFull: China
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    Titles:
      – TitleFull: Integrated effects of rainfall regime and canopy structure on interception loss: A comparative modelling analysis for an artificial larch forest.
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            NameFull: Tu, Lihui
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              M: 06
              Text: Jun2021
              Type: published
              Y: 2021
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