杭州湾南岸沿海防护林的防护效应

Protective Effect of Coastal Protection Forest along South Shore of Hangzhou Bay

为研究杭州湾南岸沿海防护林的防护效应,对沿海防护林林内外的风速、气温和相对湿度进行了布点测量。结果表明,沿海防护林对于风速有明显的减弱作用,风速最小值处于林带中央位置;风速减弱的整体趋势呈抛物线状,在林带作用下先减弱,离林带越远,这种减弱风力的作用越弱;经过防护林的作用,风力减小且风速变化幅度也减小;防护林可以调节区域小气候,防护林林内气温相对降低,相对湿度相对增加,对沿海生态环境有重要意义。

To analyze the protective effect of coastal protection forest along south shore of Hangzhou bay,the climatic factors including wind speed,temperature relative humidity were investigated at different observation points inside and outside the coastal protection forest.Result shows that coastal protection forest possesses obvious windbreak effect;the minimum wind speed is in internal woodland;the overall trend of wind speed is a parabolic,firstly wind speed decreases markedly;the farther from the forest,the weaker the role for weakened-wind-power is;wind reduces wind speed variation amplitude decreases due to the role of shelterbelts;the windbreak also can adjust regional microclimate by reducing local air temperature and increasing air relative humidity;it has great meaning on the coastal ecological environment.