Instream wood increases riverbed temperature variability in a lowland sandy stream
Instream wood increases riverbed temperature variability in a lowland sandy stream
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河内木材增加了低地沙质河流的河床温度变化
DOI：
10.1002/rra.3698
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发表时间：
2020
影响因子：
2.2
通讯作者：
Klaar M
中科院分区：
文献类型：
--
作者：
Klaar M
在河流恢复和自然洪水管理计划中，向河流（重新）引入木材越来越受欢迎。虽然已知溪流木材可以促进地貌和水力多样性，但木材在驱动地表水-河床交换和随后的河床温度方面的影响仍有待研究，特别是在低地河流中。我们利用在一个小的低地沙质溪流中出现的三种天然木结构来确定木材的存在如何改变河床的地貌、水力和热性能。研究结果表明，河流木材对促进河床局部地貌复杂性和热变化具有重要作用。木结构内部和下游的位置显示出最高的温度范围和每日变化。木结构上游的河床温度日变化较弱，无木结构的河床温度日波动较小，相对稳定。我们的研究表明，在这个低地站点，河流木材通过增加温暖（夏季）和寒冷（冬季）地表水的入渗，增加了浅层的季节性极端温度（夏季升高和冬季降低）。热缓冲作用的减少可能对河床居住社区产生重大影响，并强调在河流恢复之前应考虑在低地河流中重新引入木材的热影响。
The (re)introduction of wood into rivers is becoming increasingly popular in river restoration and natural flood management schemes. While instream wood is known to promote geomorphic and hydraulic diversity, the impact of wood in driving surface water‐streambed exchange and subsequent streambed temperatures remains under‐researched, particularly in lowland rivers. We make use of the occurrence of three naturally occurring wood structures in a small, lowland sandy stream to determine how the presence of wood alters the geomorphic, hydraulic and thermal properties of the streambed. Our results show that instream wood plays an important role in promoting localized geomorphic complexity and thermal variation in the streambed. Locations within and immediately downstream of wood structures displayed the highest temperature range and daily variation. Locations upstream of wood structures were characterized by weaker daily temperature variation, while areas without wood displayed relatively stable streambed temperatures, with little diurnal fluctuation. Our study indicates that at this lowland site, instream wood increased seasonal temperature extremes (increased summer and decreased winter temperatures) at shallow depths by enhancing infiltration of warmer (summer) and colder (winter) surface water. This reduction in thermal buffering is likely to have significant implications to streambed‐dwelling communities and highlights that the thermal impacts of wood reintroduction in lowland rivers should be considered prior to river restoration.
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第二版
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
Fujita J. Springer;Berlin;Schwab;M.(ed.)
通讯作者：
M.(ed.)
影响因子：
11.6
作者：
Matthew I. Pyne;N. L. Poff
通讯作者：
Matthew I. Pyne;N. L. Poff
大木材导致溪流无脊椎动物群落多样化
影响因子：
2.7
作者：
F. Pilotto;Andrea Bertoncin;G. Harvey;G. Wharton;M. Pusch
通讯作者：
M. Pusch
影响因子：
2.6
作者：
B. Faulkner;J. Brooks;Druscilla M. Keenan;K. Forshay
通讯作者：
K. Forshay
索诺兰沙漠溪流潜流带的物理和化学特征
影响因子：
--
作者：
H. Valett;S. Fisher;E. Stanley
通讯作者：
E. Stanley