Importance of forest stand structures for gross rainfall partitioning on China’s Loess Plateau

Hu, Xu; Fu, Zhaoqi; Sun, Ge; Wang, Biao; Liu, Keyan; Zhang, Churui; Han, Lu; Chen, Lixin; Zhang, Zhiqiang

doi:10.1016/j.jhydrol.2024.130671

Cited by 1 publication

(1 citation statement)

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“…Other research focused on identifying driving factors of canopy interception. Hu et al (2024) studied rainfall redistribution in plantations and natural forests of R. pseudoacacia, concluding that stand structure plays a dominant role in precipitation interception during the growth season. While studies on R. pseudoacacia plantations are more common in this region, there is a paucity of reports on Platycladus orientalis (P. orientalis) and Pinus tabuliformis (P. tabuliformis) plantations.…”

Section: Introductionmentioning

confidence: 99%

Modelling rainfall interception losses of three plantations in the Loess Plateau

Wei,

Song,

et al. 2024

Hydrological Processes

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The forest canopy affects the water entering the forest ecosystem by intercepting rainfall. This is especially pertinent in forests that depend on rainfall for their ecological water needs, quantifying and simulating interception losses provide critical insights into their ecological hydrological processes. In the semi‐arid areas of the Loess Plateau, afforestation has become an effective ecological restoration measure. However, the rainfall interception process of these plantations is still unclear. To quantify and model the canopy interception of these plantations, we conducted a two‐year rainfall redistribution measurement experiment in three typical plantations, including a deciduous broadleaf plantation (Robinia pseudoacacia) and two evergreen coniferous plantations (Platycladus orientalis and Pinus tabuliformis). Based on this, the revised Gash model was used to simulate their interception losses, and the model applicability across varying rainfall types was further compared and verified. The experiment clarified the rainfall redistribution in the three plantations, and the proportions of throughfall to gross rainfall in Robinia pseudoacacia, Platycladus orientalis, and Pinus tabuliformis were 84.8%, 70.4%, and 75.6%; corresponding, the stemflow proportions were 2.0%, 2.2%, and 1.8%; the interception losses were 13.2%, 27.4%, and 22.6%, respectively. The dominant rainfall pattern during the experiment was characterized by low‐amounts, moderate‐intensity, and short‐duration, during which the highest interception proportions across the three plantations were observed. We used the Penman‐Monteith equation and the regression method, respectively, to estimate the canopy average evaporation rate of the revised Gash model, finding that the latter provides a closer match to the measured cumulative interception (NSE >0.7). When simulating interception under the three rainfall patterns, the model with the regression method better simulated the cumulative interception and event‐scale interception for Platycladus orientalis and Pinus tabuliformis plantations under the dominant rainfall pattern. The results contribute valuable information to assess the impact of forest rainfall interception on regional hydrologic processes.

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Section: Introductionmentioning

confidence: 99%