Study on hydrological functions of litter layers in North China.
Study on hydrological functions of litter layers in North China.
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DOI：
10.1371/journal.pone.0070328
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Xie B
中科院分区：
文献类型：
--
作者：
Li X;Niu J;Xie B
在森林生态系统水平衡和水文过程的研究中，林冠截流、通流、茎流和径流受到了相当大的关注。过去的研究忽视或低估了凋落物层水文功能的作用，尽管一些研究考虑了降雨和凋落物的各种特征对凋落物拦截的影响。基于华北地区模拟降雨和凋落物条件，在5种模拟降雨强度和4种凋落物质量条件下，研究了凋落物质量、降雨强度和凋落物类型对凋落物最大储水量(S)和凋落物截留储水量(C)的影响。结果表明：1)凋落物S值随凋落物质量呈线性增加，阔叶凋落物S值平均为针叶凋落物S值的2.65倍；2)降雨强度而不是凋落物质量决定最大截留库容（Cmax）；Cmax随降雨强度的增加呈线性增加；最小截留存储量（Cmin）与凋落物质量呈线性关系，与降雨强度相关性较差；3)凋落物类型影响Cmax和Cmin；阔叶凋落物的Cmax和Cmin均大于针叶凋落物，说明阔叶凋落物比针叶凋落物更能截留和储存水分；(4) Cmax与Cmin之间存在间隙，表明凋落物在降雨后发挥了重要作用，使雨水渗入或产生径流，而不是拦截雨水并使其蒸发；5)在相同凋落物质量下，Cmin始终小于S，在未来的截留预测中应考虑到这一点。植被和降水特征在水文特征中起着重要作用。
Canopy interception, throughfall, stemflow, and runoff have received considerable attention during the study of water balance and hydrological processes in forested ecosystems. Past research has either neglected or underestimated the role of hydrological functions of litter layers, although some studies have considered the impact of various characteristics of rainfall and litter on litter interception. Based on both simulated rainfall and litter conditions in North China, the effect of litter mass, rainfall intensity and litter type on the maximum water storage capacity of litter (S) and litter interception storage capacity (C) were investigated under five simulated rainfall intensities and four litter masses for two litter types. The results indicated: 1) the S values increased linearly with litter mass, and the S values of broadleaf litter were on average 2.65 times larger than the S values of needle leaf litter; 2) rainfall intensity rather than litter mass determined the maximum interception storage capacity (Cmax); Cmax increased linearly with increasing rainfall intensity; by contrast, the minimum interception storage capacity (Cmin) showed a linear relationship with litter mass, but a poor correlation with rainfall intensity; 3) litter type impacted Cmax and Cmin; the values of Cmax and Cmin for broadleaf litter were larger than those of needle leaf litter, which indicated that broadleaf litter could intercepte and store more water than needle leaf litter; 4) a gap existed between Cmax and Cmin, indicating that litter played a significant role by allowing rainwater to infiltrate or to produce runoff rather than intercepting it and allowing it to evaporate after the rainfall event; 5) Cmin was always less than S at the same litter mass, which should be considered in future interception predictions. Vegetation and precipitation characteristics played important roles in hydrological characteristics.
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影响因子：
6.4
作者：
Marin, CT;Bouten, IW;Dekker, S
通讯作者：
Dekker, S
影响因子：
3.2
作者：
Sato, Y;Kumagai, T;Ogawa, S
通讯作者：
Ogawa, S
影响因子：
6.2
作者：
Geddes, N;Dunkerley, D
通讯作者：
Dunkerley, D
影响因子：
5.4
作者：
HELVEY, JD;PATRIC, JH
通讯作者：
PATRIC, JH
影响因子：
6.4
作者：
Li, XY;Gong, JD;Wei, XH
通讯作者：
Wei, XH