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- W2389847367 abstract "The ecological effect of an artificial poplar (Populus simonii) forest against wind was investigated by monitoring wind speeds at four heights of 0.25, 0.5, 1 and 2 m using fixed observation points placed at distances of 6H (H is mean tree height) from the forest edge of the windward side and 6H from the forest edge of the leeward side over the period from April through July 2001. The relationship between leaf area index in the poplar forest and the attenuation coefficient of wind speed was also examined by curvilinear regression. It was found that: (1) There were marked differences in the frequency of occurrence of erosive winds (wind speed≥4 m/s) among months. The frequency of occurrence of erosive wind was much higher in April and May than in June and July, suggesting that April and May are the major erosive period in the study area. (2) Significantly higher frequency of occurrence was noted in winds of SSW, NNW, NW, S, WNW, N and WSW in April, in winds of NW, NNW, W, WSW, WNW and SW in May, in winds of S, SSW, ESE and NNE in June and in winds of SSW, S and SW in July. (3) The protective effects of the poplar forest were greatest on winds with N,NNE,NE,ENE,NNE and NNW wind directions having the attenuation coefficients of wind speed of 49%~55%,intermediate on winds with NW, E, SW, WSW and W wind directions having the attenuation coefficients of wind speed of 30%~37%, and least on winds with SE,SSE,S and ESE wind directions having the attenuation coefficients of wind speed of 0.1%~12%. (4) The relationship between the leaf area index and the attenuation coefficient of wind speed at 1 m and 2 m heights can be described by a cubic curve, whereas that at 0.5m height can be described by a logarithmic curve and that at 0.25 m height can be described by an exponential curve. " @default.
- W2389847367 created "2016-06-24" @default.
- W2389847367 creator A5055101166 @default.
- W2389847367 date "2003-01-01" @default.
- W2389847367 modified "2023-09-25" @default.
- W2389847367 title "Ecological Effect of Artificially Established Poplar Forest against Wind in Horqin Sandy Land of Inner Mongolia" @default.
- W2389847367 hasPublicationYear "2003" @default.
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