Rainfall redistribution of a virgin Pinus koraiensis forest and secondary Betula platyphylla forest in Northeast China |
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| Authors: | Tijiu Cai Houcai Sheng Xueqing Cui |
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| Institution: | (1) School of Forestry, Northeast Forestry University, Harbin, 150040, China |
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| Abstract: | A virgin Pinus koraiensis forest in the Xiaoxing’an Mountains was selected to study its rainfall redistribution effect via 97 rainfall occurrences
during a growing season. The following results were obtained: 1) The canopy interception of the P. koraiensis virgin forest amounted to 98168 mm during a growing season (May to September), which was 19.6 per cent of the total rainfall
and 1.3 times that of a secondary Betula platyphylla forest. Compared with other forest types in China (11.4%–36.5%), the ratio of the canopy interception in the virgin pine
forest was at a medium level. 2) The throughfall of the virgin pine forest was 395.77 mm, which accounted for 78.7% of total
precipitation, and the stem-flow was 8.78 mm, accounting for 1.74% of total precipitation. Compared with the secondary birch
forest, the virgin pine forest had lower throughfall but higher stem-flow. 3) Cubic regression equations (p < 0.01) which describe the relation between throughfall, stem-flow and canopy interception in the virgin pine forest and
rainfall in an open field were fitted. A linear regression equation (p < 0.01) was found to be a better fit for the relationship between throughfall of the secondary birch forest and rainfall
outside the forest. Factors affecting throughfall and stem-flow were analyzed, with results providing a good reference to
the study of rainfall redistribution in coniferous and broadleaved mixed forests.
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Translated from Science of Soil and Water Conservation, 2006, 4(6): 61–65 译自: 中国水土保持科学] |
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| Keywords: | virgin Pinus koraiensis forest secondary Betula platyphylla forest canopy interception throughfall stem-flow |
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