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为了探究毛竹林林冠截留与其影响因素之间的关系,于2012年4月至2013年3月,定位观测了毛竹林的林冠截留特征以及相关影响因子数据。结果表明,研究期内,长三角地区毛竹林的穿透雨率、树干茎流率和林冠截留率,分别占同期降雨总量的60.6%,6.7%和32.7%;林冠枝叶部分与树干部分的持水能力分别为0.82和0.1mm;引入叶面积指数作为林冠特征并与林冠截留进行分析,结果发现各月林冠截留总量随月平均叶面积指数的增加呈一定程度上增大的趋势,月平均林冠截留率随各月平均叶面积指数的增大而减小;各气象因子与毛竹林的林冠截留量的灰色关联度大小顺序为:降雨强度>降雨量>风速>空气温度>风向>空气湿度,各气象因子与毛竹林的林冠截留率的灰色关联度大小顺序依次为:空气温度>风向>降雨量>风速>降雨强度>空气湿度。
In order to explore the relationship between canopy interception and its influencing factors in Moso bamboo forest, from April 2012 to March 2013, the canopy interception characteristics and related impact factors of Moso bamboo forest were observed. The results showed that during the study period, the penetration rate of bamboo forest, the stem flow rate and canopy interception rate of the bamboo forests in the Yangtze River Delta accounted for 60.6%, 6.7% and 32.7% of the total precipitation in the same period respectively. Water holding capacity of 0.82 and 0.1 mm, respectively. The leaf area index was introduced as a canopy feature and analyzed with canopy interception. The results showed that the total interception volume of canopy increased with the increase of monthly average leaf area index to a certain extent, The average canopy interception rate decreased with the increase of average leaf area index of each month. The order of gray relational order of the meteorological factors and canopy interception was as follows: rainfall intensity> rainfall> wind speed> air temperature> wind direction> air The order of gray relational degree of humidity, meteorological factors and canopy interception rate was as follows: air temperature> wind direction> rainfall> wind speed> rainfall intensity> air humidity.