Effects of Clearcutting on Rain-on-Snow Runoff in Western Oregon: A New Look at Old Studies
Effects of Clearcutting on Rain-on-Snow Runoff in Western Oregon: A New Look at Old Studies
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皆伐对俄勒冈州西部雨雪径流的影响：旧研究的新视角
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
R. Harr
中科院分区：
文献类型：
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作者：
R. Harr
在俄勒冈州西部的两个实验流域的研究，更新和重新分析的径流数据的结果表明，皆伐采伐已经改变了积雪的积累和融化，足以增加降雨期间融雪所造成的峰值流量的大小。在一个96公顷的皆伐流域在短暂的积雪区，峰值流量重现期约3-8年高于prelogging数据预测。在一个类似的明确的10公顷的流域，在降雨过程中融化的相对较深的积雪所造成的峰值流量的大小也较高的伐木后。更高的峰值流量表明更高的水输送到土壤的速率，这反过来又表明山坡和渠道侵蚀的可能性增加。
Results of updating and reanalyzing streamflow data from studies in two experimental watersheds in western Oregon suggest that clearcut logging has altered snow accumulation and melt enough to have increased the size of peak flows caused by snowmelt during rainfall. In a 96-ha clearcut watershed in the transient snow zone, peak flows with return periods of roughly 3–8 years were higher than predicted by prelogging data. In a similarly clearcut 10-ha watershed, sizes of peak flows caused by melting of relatively deep snowpacks during rainfall were also higher after logging. Higher peak flows indicate a higher rate of water delivery to soils, which, in turn, suggests increased potential for both hillslope and channel erosion.