Effect of the litter layer on runoff and evapotranspiration using the paired watershed method
Effect of the litter layer on runoff and evapotranspiration using the paired watershed method
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DOI：
10.1007/s10310-016-0542-5
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发表时间：
2016-10
影响因子：
1.5
通讯作者：
Mie Gomyo;K. Kuraji
中科院分区：
文献类型：
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作者：
Mie Gomyo;K. Kuraji
森林地面上的枯落物层可以通过改变各种水文过程来影响短期径流和长期水平衡。在这项研究中，我们使用配对流域方法量化了枯落物层对径流和蒸散的流域规模影响。在 6 年试验期的后半段，每年对面积 1.19 公顷的森林流域进行枯落物层清除。邻近面积为 1.42 公顷的森林流域被保留作为对照。我们的结果表明，垃圾清除在处理后期间使 3 年径流增加了 80.3 毫米。此外，当控制流域的峰值流量范围为0.4-1.0毫米/小时和>1.0毫米/小时时，洪水事件期间的峰值径流分别比枯落物层清除前观测到的峰值径流高出约1.5倍和1.4倍。这些数据表明，枯枝落叶层的清除可以减少枯枝落叶层的拦截，从而增加峰值流量，特别是在相对较大的洪水径流事件期间。
The litter layer on a forest floor can influence both short-term runoff and long-term water balance through modification of various hydrological processes. In this study, we have quantified the watershed-scale effects of the litter layer on runoff and evapotranspiration using a paired watershed method. The removal of the litter layer in a forested watershed with an area of 1.19 ha was conducted annually over the latter half of a 6-year experimental period. An adjacent forested watershed with an area of 1.42 ha was preserved as a control. Our results indicated that litter removal increased the 3-year runoff by 80.3 mm during the post-treatment period. Furthermore, when the peak flow range in the control watershed was 0.4–1.0 mm/h and >1.0 mm/h, peak runoff during flood events was about 1.5 and 1.4 times greater than that observed before litter layer removal, respectively. These data suggest that litter layer removal can decrease litter layer interception and, hence, increase peak flow, particularly during relatively large flood runoff events.