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[1]ZHANG Jianguo,Yan Meijie,Du Sheng.Characteristics of Rainfall Partitioning in Two Typical Forests Under Continuous Rainfall in the Loess Hilly Region[J].Research of Soil and Water Conservation,2016,23(05):158-163,168.

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Characteristics of Rainfall Partitioning in Two Typical Forests Under Continuous Rainfall in the Loess Hilly Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 05 Page number: 158-163,168 Column: Public date: 2016-10-28

Title:: Characteristics of Rainfall Partitioning in Two Typical Forests Under Continuous Rainfall in the Loess Hilly Region

Author(s):: ZHANG Jianguo^1,3, Yan Meijie^1,2, Du Sheng^1,2; 1. State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: continuous rainfall; stem flow; throughfall; canopy interception; Quercus liaotungensis; Robinia pseudoacacia

CLC:: S715.2

DOI:: -

Abstract:: Rainfall partitioning by vegetation is important hydrological process and functions of ecosystems. We investigated the stem flow and throughfall in two typical forests: a natural Quercus liaotungensis dominated forest and a pure Robinia pseudoacacia plantation under continuous rainfall events by field observation using the rainfall collector. The results showed that there was significant linear relation between throughfall and gross precipitation in two typical forests for continuous rainfall events. Throughfall accounted for 86% and 89% of total rainfall in Quercus liaotungensis forest and in Robinia pseudoacacia plantation, respectively. Stem flow of individual trees of Quercus liaotungensis was positively linearly correlated with DBH (Diameter at breast height); stem flow of individuals of Robinia pseudoacacia was negatively linearly correlated with DBH. The proportions of stand stem flows in gross rainfall of two typical forests were 14% and 6%, respectively. The sum of stem flow and throughfall was equal to the gross rainfall in Quercus liaotungensis forest, indicating that there was no canopy interception for continuous rainfall events in this forest. The difference between the sum of stem flow and throughfall with the gross rainfall was 5% in Robinia pseudoacacia plantation, and maybe it was related with the redistribution of throughfall in the shrub layer in this plantation.

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