Fifty years of runoff response to conversion of old‐growth forest to planted forest in the H. J. Andrews Forest, Oregon, USA
Fifty years of runoff response to conversion of old‐growth forest to planted forest in the H. J. Andrews Forest, Oregon, USA
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美国俄勒冈州 H.J.安德鲁斯森林 50 年来对老林转变为人工林的径流响应
DOI：
10.1002/hyp.14168
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发表时间：
2021
影响因子：
3.2
通讯作者：
Jones, Julia A.
中科院分区：
文献类型：
--
作者：
Crampe, Emily A.;Segura, Catalina;Jones, Julia A.
长期流域实验提供了了解森林水文学对过去伐木、道路建设、森林再生的反应及其与气候和地貌过程（例如与道路相关的滑坡）的相互作用的机会。我们研究了美国俄勒冈州 H. J. Andrews 实验森林配对流域实验的 50 年记录，其中 125 至 450 年树龄的针叶林在 20 世纪 60 年代和 1970 年代被砍伐，并转化为人工针叶林。我们评估了经过处理的流域和参考流域的 1222 个事件的快流和延迟流在砍伐和道路建设后如何随季节变化，包括 50 年的人工林生长、重大洪水和几十年来的积雪减少。水年（秋季）早期的快速径流在第一个十年中增加了 99%，到砍伐后的第三个到第五个十年下降到收获前水平以下（-1% 到 -15%）。秋季延迟流量的反应比快速流量更显着，到第五个十年，所有流域的流量均降至处理前水平以下，这与人工林蒸腾作用的增加一致。在冬季和春季，快速流量增加较少（+12% 至 70%），但在整个第四个或第五个十年中仍高于处理前的水平，这可能受到收获后燃烧、道路和山体滑坡的影响。在整个 50 年的研究期间，快速流量保持较高水平，并且远高于过去二十年在一个分水岭中的延迟流量，在创纪录的洪水之后，与道路相关的流量路由和泥石流变化增加了网络连通性。区域积雪的长期下降与处理流域与参考流域的响应没有明显关联。 50多年前，因采伐古老针叶林而改变的水文过程（蒸腾作用、截流、融雪和水流路径）继续改变着水流，但没有明确的水文恢复证据。这些发现强调了持续长期分水岭实验的重要性。
Long‐term watershed experiments provide the opportunity to understand forest hydrology responses to past logging, road construction, forest regrowth, and their interactions with climate and geomorphic processes such as road‐related landslides. We examined a 50‐year record from paired‐watershed experiments in the H. J. Andrews Experimental Forest, Oregon, USA in which 125 to 450‐year‐old conifer forests were harvested in the 1960s and 1970s and converted to planted conifer forests. We evaluated how quickflow and delayed flow for 1222 events in treated and reference watersheds changed by season after clearcutting and road construction, including 50 years of growth of planted forest, major floods, and multi‐decade reductions in snowpack. Quickflow runoff early in the water year (fall) increased by up to +99% in the first decade, declining to below pre‐harvest levels (−1% to −15%) by the third to fifth decade after clearcutting. Fall delayed flow responded more dramatically than quickflow and fell below pre‐treatment levels in all watersheds by the fifth decade, consistent with increased transpiration in the planted forests. Quickflow increased less (+12% to 70%) during the winter and spring but remained higher than pre‐treatment levels throughout the fourth or fifth decade, potentially impacted by post‐harvest burning, roads, and landslides. Quickflow remained high throughout the 50‐year period of study, and much higher than delayed flow in the last two decades in a watershed in which road‐related changes in flow routing and debris flows after the flood of record increased network connectivity. A long‐term decline in regional snowpack was not clearly associated with responses of treated vs. reference watersheds. Hydrologic processes altered by harvest of old‐growth conifer forest more than 50 years ago (transpiration, interception, snowmelt, and flow routing) continued to modify streamflow, with no clear evidence of hydrologic recovery. These findings underscore the importance of continued long‐term watershed experiments.
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影响因子：
5.4
作者：
J. Hewlett;J. D. Helvey
通讯作者：
J. Hewlett;J. D. Helvey
俄勒冈州喀斯喀特西部大峰流量事件的降水-融雪时间和融雪增强
影响因子：
5.4
作者：
K. Jennings;Julia A. Jones
通讯作者：
Julia A. Jones
DOI：
--
发表时间：
2003
期刊：
影响因子：
--
作者：
B. Wemple;J. Jones
通讯作者：
J. Jones
DOI：
10.2737/pnw-gtr-760
发表时间：
2008
期刊：
--
影响因子：
--
作者：
G. Grant;S. Lewis;F. Swanson;J. Cissel;J. McDonnell
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G. Grant;S. Lewis;F. Swanson;J. Cissel;J. McDonnell
皆伐对俄勒冈州西部雨雪径流的影响：旧研究的新视角
DOI：
--
发表时间：
1986
期刊：
影响因子：
--
作者：
R. Harr
通讯作者：
R. Harr