Hierarchical climate-driven dynamics of the active channel length in temporary streams.
Hierarchical climate-driven dynamics of the active channel length in temporary streams.
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DOI：
10.1038/s41598-021-00922-2
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发表时间：
2021-11-02
影响因子：
4.6
通讯作者：
Durighetto N
中科院分区：
文献类型：
--
作者：
Botter G;Vingiani F;Senatore A;Jensen C;Weiler M;McGuire K;Mendicino G;Durighetto N
放眼望去，河流网络似乎是静态的。然而，流动的溪流随着周围环境不断变化的水文条件而扩张和收缩。尽管断流河流具有生态和生物地球化学价值，但破译河流的临时性质并量化其范围仍然具有挑战性。利用一个独特的观测数据集，跨越不同的地貌气候设置，我们证明了河网动态的一般分层结构的存在。具体来说，临时流激活遵循固定且可重复的顺序，其中只有在最持久的部分已经流动时，最不持久的部分才会激活。这种分层现象不仅有利于监测活动，而且有助于建立一个通用的数学框架，阐明气候如何驱动活动流长度的时间变化。随着气候的干燥，流动网络的平均比例减少，而其相对变率增加。我们的研究为表征临时河流和量化其生态和生物地球化学影响提供了新的概念基础。
Looking across a landscape, river networks appear deceptively static. However, flowing streams expand and contract following ever-changing hydrological conditions of the surrounding environment. Despite the ecological and biogeochemical value of rivers with discontinuous flow, deciphering the temporary nature of streams and quantifying their extent remains challenging. Using a unique observational dataset spanning diverse geomorphoclimatic settings, we demonstrate the existence of a general hierarchical structuring of river network dynamics. Specifically, temporary stream activation follows a fixed and repeatable sequence, in which the least persistent sections activate only when the most persistent ones are already flowing. This hierarchical phenomenon not only facilitates monitoring activities, but enables the development of a general mathematical framework that elucidates how climate drives temporal variations in the active stream length. As the climate gets drier, the average fraction of the flowing network decreases while its relative variability increases. Our study provides a novel conceptual basis for characterizing temporary streams and quantifying their ecological and biogeochemical impacts.
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影响因子：
18.3
作者：
Battin, Tom J.;Kaplan, Louis A.;Sabater, Francesc
通讯作者：
Sabater, Francesc
DOI：
10.1073/pnas.1320890111
发表时间：
2014-09-23
影响因子：
11.1
作者：
Jaeger, Kristin L.;Olden, Julian D.;Pelland, Noel A.
通讯作者：
Pelland, Noel A.
影响因子：
5.9
作者：
Acuna, V.;Hunter, M.;Ruhi, A.
通讯作者：
Ruhi, A.
影响因子：
3.7
作者：
Gomez-Gener, Lluis;Obrador, Biel;von Schiller, Daniel
通讯作者：
von Schiller, Daniel
影响因子：
5.4
作者：
Collins, D. B. G.;Bras, R. L.
通讯作者：
Bras, R. L.