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单词 throughfall
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throughfall
throughfall n.
Brit. /ˈθruːfɔːl/
,
U.S. /ˈθruˌfɔl/
,
/ˈθruˌfɑl/
Ecology (the amount of) precipitation that reaches the ground through a canopy of vegetation, either directly or by dripping from leaves, branches, etc. (often contrasted with stemflow n. at stem n.1 Compounds 2).
ΚΠ
1948 P. B. Rowe Infl. Woodland Chaparral on Water & Soil in Central Calif. 46 Measurements on the undisturbed plots for the year 1937–38 showed that the precipitation reaching the ground in the open was 61.15 inches; precipitation reaching the ground as throughfall (rainfall passing or dripping from the brush cover) was 49.06 inches.
1949 E. L. Hamilton & P. B. Rowe Rainfall Interception by Chaparral in Calif. 17 For the two years of high precipitation, throughfall was 80 percent, stemflow 15 percent, and interception loss 5 percent of the annual rainfall.
1985 Austral. Jrnl. Forest Res. 15 309 Loss of organic matter after 2 years was strongly correlated with the amount of water reaching the forest floor as throughfall.
2011 J. Landsberg & P. Sands Physiol. Ecol. Forest Production vii. 192 For dense canopies throughfall may be very low until the canopy saturates.
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