摘要
在2009年3—10月对浙江庙山坞自然保护区人工毛竹林的水文生态特征进行了定位样地和径流场观测研究,以探讨其林内降水分配规律和水土保持功能。结果表明：（1）观测期内,林外总降水量达1 220.8 mm,穿透雨量、茎流量、林冠截留量分别占总降水量的78.2%、7.3%和14.5%。随着林外降水量的增加,穿透雨量、茎流量呈线性增加,而林冠截留量先是迅速增加,当林外降水量达10 mm后增速减缓,并趋于稳定（5~6 mm）。（2）人工毛竹林林地凋落物现存量平均为4.37 t.hm-2,最大持水率为223%,在1次降水中最大的蓄水潜力为0.975 mm。（3）径流场的地表径流量为2.41 mm,仅占总降水量的0.20%,径流泥沙量为126.3 kg.hm-2,平均1.034 kg.hm-2.mm-1。表明本试验地人工毛竹林水土流失较少,水土保持效应较好。
The eco-hydrological effects of bamboo plantation in Miaoshanwu Nature Reserve,Zhejiang Province,were observed and studied from March to October of 2009 at the level of stand and runoff plot.The results showed that：（1） The total precipitation during the observation period was 1 220.8 mm,the through-fall,stem-flow and canopy interception contributed to 78.2%,7.3%,and 14.5% of total precipitation,respectively.With the precipitation increasing,the through-fall and stem-flow increased linearly,while the canopy interception increased abruptly at the beginning till the precipitation reached about 10 mm when the canopy interception steadily varied from 5mm to 6 mm;（2） The litterfall on forest floor was 4.37 t·hm-2.The maximum water retention ratio and water-holding capacity of litter were 223% and 0.975 mm;（3） The surface runoff of plot was low and only 2.41 mm,accounting for 0.20% of the total precipitation.The total sediment was 126.3 kg·hm-2,implying a soil erosion of 1.034 kg·hm-2·mm-1.It is concluded that the function of soil and water conservation of bamboo plantation on the plot is pretty good.
出处
《林业科学研究》
CSCD
北大核心
2010年第5期713-718,共6页
Forest Research
基金
国家"十一五"科技支撑重大项目专题(2006BAD03A1806)
中国林科院中央级公益性科研院所基本科研业务费重点项目(CAFYBB2008006)
中国林科院亚热带林业研究所中央级公益性科研院所基本业务费重点项目(RISF060701)
关键词
水文生态特征
毛竹林
林冠截留
茎流
穿透雨
地表径流
土壤侵蚀
eco-hydrological effects
bamboo plantation
canopy interception
stem-flow
through-fall
surface runoff
soil erosion
