Alternative stable states and hydrological regime shifts in a large intermittent river
Alternative stable states and hydrological regime shifts in a large intermittent river
复制标题
大型间歇性河流的替代稳定状态和水文情势变化
DOI：
10.1088/1748-9326/ac7539
复制
发表时间：
2022
影响因子：
6.7
通讯作者：
Seybold, Erin C
中科院分区：
文献类型：
--
作者：
Zipper, Sam;Popescu, Ilinca;Compare, Kyle;Zhang, Chi;Seybold, Erin C
非常年河流和溪流占全球河流网络的一半以上，而且分布越来越广。从常年流到非常年流的转变是一种阈值型变化，可导致水生生态系统的替代稳定状态，但目前尚不清楚径流本身在潮湿（流动）或干燥（无流）条件下是否稳定。在这里，我们调查的驱动程序和反馈与政权之间的湿和干的条件下，在间歇性达到的阿肯色州河（美国）在过去的23年。多方面的证据表明，这些制度代表了替代稳定状态，包括（a）流量时间序列的显著跳跃，而不伴随着降水和地下水抽水等流动驱动因素的跳跃;（B）多模态状态分布，92%的月份在90%的天数内经历无流动条件< 10% or>，尽管降水和抽水呈单峰分布;（c）气候和流动状态之间的滞后关系。地下水位似乎是水文状况的主要控制因素，因为在湿润状况下，冲积含水层的地下水位高于河流水位，而在干旱状况下，则低于河床水位。地下水位的变化，反过来，驱动过程发生在区域规模（地表水从上游流入，地下水抽水）和到达规模（河流含水层交换，通过土柱扩散补给）。历史政权的转变与不同的压力，包括网络断开上游用水，增加流量稳定性可能与水库运行，以及异常的潮湿和干燥的气候条件。总之，稳定的反馈之间的上游流入，流含水层的相互作用，气候，植被和抽水似乎在这个网站上创建替代湿和干稳定状态。这些稳定的反馈表明，广泛观察到的从常年流到非常年流的转变将难以逆转。
Non-perennial rivers and streams make up over half the global river network and are becoming more widespread. Transitions from perennial to non-perennial flow are a threshold-type change that can lead to alternative stable states in aquatic ecosystems, but it is unknown whether streamflow itself is stable in either wet (flowing) or dry (no-flow) conditions. Here, we investigated drivers and feedbacks associated with regime shifts between wet and dry conditions in an intermittent reach of the Arkansas River (USA) over the past 23 years. Multiple lines of evidence suggested that these regimes represent alternative stable states, including (a) significant jumps in discharge time series that were not accompanied by jumps in flow drivers such as precipitation and groundwater pumping;(b) a multi-modal state distribution with 92% of months experiencing no-flow conditions for< 10% or> 90% of days, despite unimodal distributions of precipitation and pumping; and (c) a hysteretic relationship between climate and flow state. Groundwater levels appear to be the primary control over the hydrological regime, as groundwater levels in the alluvial aquifer were higher than the stream stage during wet regimes and lower than the streambed during dry regimes. Groundwater level variation, in turn, was driven by processes occurring at both the regional scale (surface water inflows from upstream, groundwater pumping) and the reach scale (stream–aquifer exchange, diffuse recharge through the soil column). Historical regime shifts were associated with diverse pressures including network disconnection caused by upstream water use, increased flow stability potentially associated with reservoir operations, and anomalous wet and dry climate conditions. In sum, stabilizing feedbacks among upstream inflows, stream–aquifer interactions, climate, vegetation, and pumping appear to create alternative wet and dry stable states at this site. These stabilizing feedbacks suggest that widespread observed shifts from perennial to non-perennial flow will be difficult to reverse.
登录
查看更多内容
随机日强迫下的多个水文吸引子： 1. 可以存在多个吸引子吗？
影响因子：
5.4
作者：
T. Peterson;A. Western
通讯作者：
A. Western
渗漏含水层系统中抽水引起的水位下降和水流枯竭
影响因子：
2.6
作者：
J. Butler;Xiaoyong Zhan;V. Zlotnik
通讯作者：
V. Zlotnik
DOI：
10.1002/wat2.1504
发表时间：
2021-02
期刊：
Wiley Interdisciplinary Reviews: Water
影响因子：
--
作者：
M. Shanafield;Sarah A. Bourke;M. Zimmer;K. Costigan
通讯作者：
M. Shanafield;Sarah A. Bourke;M. Zimmer;K. Costigan
影响因子：
5.4
作者：
Burns, Erick R.;Zhu, Yonghui;Dunham, Jason B.
通讯作者：
Dunham, Jason B.
影响因子：
6.4
作者：
M. Peña‐Gallardo;S. Vicente‐Serrano;J. Hannaford;J. Lorenzo-Lacruz;M. Svoboda;F. Domínguez‐Castro
通讯作者：
M. Peña‐Gallardo;S. Vicente‐Serrano;J. Hannaford;J. Lorenzo-Lacruz;M. Svoboda;F. Domínguez‐Castro