Organizational Principles of Hyporheic Exchange Flow and Biogeochemical Cycling in River Networks Across Scales
Organizational Principles of Hyporheic Exchange Flow and Biogeochemical Cycling in River Networks Across Scales
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DOI：
10.1029/2021wr029771
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发表时间：
2022-02
影响因子：
5.4
通讯作者：
S. Krause;Benjamin W. Abbott;V. Baranov;S. Bernal;P. Blaen;T. Datry;J. Drummond;J. Fleckenstein;Jesus Gomez Velez;D. Hannah;J. Knapp;M. Kurz;J. Lewandowski;E. Martí;C. Mendoza‐Lera;A. Milner;A. Packman;G. Pinay;A. Ward;Jay P. Zarnetzke
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作者：
S. Krause;Benjamin W. Abbott;V. Baranov;S. Bernal;P. Blaen;T. Datry;J. Drummond;J. Fleckenstein;Jesus Gomez Velez;D. Hannah;J. Knapp;M. Kurz;J. Lewandowski;E. Martí;C. Mendoza‐Lera;A. Milner;A. Packman;G. Pinay;A. Ward;Jay P. Zarnetzke
潜流区提高了淡水生态系统对极端水文和全球环境变化的复原力。然而，目前的概念化hyporheic交换，停留时间分布，并在河床沉积物中相关的地球化学循环并不总是准确地解释在溪流和河流中观察到的水文和地球化学的复杂性。具体而言，现有的概念模型不足以代表耦合传输和反应沿着地下水和地表水流动路径，在河床生态地球化学功能的作用，和地表-地下生态过程之间的反馈，无论是在内部和跨空间和时间尺度。虽然简化这些问题的方法是合理的，必要的转让，从我们的概念排除重要的潜流过程可能会导致错误的结论和相互关联的地表水和地下水环境的理解和管理不足。这在景观尺度上尤其如此，在景观尺度上，潜流交换流（HEF）和地球化学过程的时空动力学的组织原则在很大程度上仍然没有被描述。本文旨在确定最重要的驱动程序和控制HEF和生物地球化学循环的基础上，从广泛的河流系统的综合研究结果。我们使用这些观测结果来测试当前的范例和概念模型，讨论当地到区域水文，地貌和生态控制的潜流带功能的相互作用。这种改进的概念化的景观组织原则的HEF和生态地球化学过程的驱动程序，从达到集水区尺度将告知未来的河流研究方向和流域管理战略。
Hyporheic zones increase freshwater ecosystem resilience to hydrological extremes and global environmental change. However, current conceptualizations of hyporheic exchange, residence time distributions, and the associated biogeochemical cycling in streambed sediments do not always accurately explain the hydrological and biogeochemical complexity observed in streams and rivers. Specifically, existing conceptual models insufficiently represent the coupled transport and reactivity along groundwater and surface water flow paths, the role of autochthonous organic matter in streambed biogeochemical functioning, and the feedbacks between surface‐subsurface ecological processes, both within and across spatial and temporal scales. While simplified approaches to these issues are justifiable and necessary for transferability, the exclusion of important hyporheic processes from our conceptualizations can lead to erroneous conclusions and inadequate understanding and management of interconnected surface water and groundwater environments. This is particularly true at the landscape scale, where the organizational principles of spatio‐temporal dynamics of hyporheic exchange flow (HEF) and biogeochemical processes remain largely uncharacterized. This article seeks to identify the most important drivers and controls of HEF and biogeochemical cycling based on a comprehensive synthesis of findings from a wide range of river systems. We use these observations to test current paradigms and conceptual models, discussing the interactions of local‐to‐regional hydrological, geomorphological, and ecological controls of hyporheic zone functioning. This improved conceptualization of the landscape organizational principles of drivers of HEF and biogeochemical processes from reach to catchment scales will inform future river research directions and watershed management strategies.