人工毛竹林水文生态功能的初步研究

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

A Primary Study on the Eco-hydrological Effects of Bamboo Plantation

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.