Toward a conceptual framework of hyporheic exchange across spatial scales
Toward a conceptual framework of hyporheic exchange across spatial scales
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DOI：
10.5194/hess-22-6163-2018
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发表时间：
2018-05
影响因子：
6.3
通讯作者：
C. Magliozzi;R. Grabowski;A. Packman;S. Krause
中科院分区：
文献类型：
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作者：
C. Magliozzi;R. Grabowski;A. Packman;S. Krause
抽象的。河流不是孤立的系统，而是从其受限的源头到广阔的低地泛滥平原与地下水不断地相互作用。在过去的几十年里，对地下水位带(HZ)的研究增加了人们对相连的河流和地下水系统的水文重要性和生态意义的认识。虽然最近的研究已经在河床和河段尺度上研究了珠江三角洲的水文、生物地球化学和生态水文过程，但对河段尺度和更大尺度上驱动河床交换流(HEF)的不同空间和时间尺度上的因素之间基于过程的相互作用仍缺乏全面的了解。因此，本文综述了在流域、流域和河流尺度上相互作用以控制地下水交换流量的时空变化的因素和过程。通过使用多尺度视角，本综述将现场观察和模拟研究联系起来，以确定HEF的过程驱动模式和动力学。最后，在新的地理信息系统分析的支持下，通过一个实例说明了过程相互作用在多个空间尺度上的影响，突出了流域尺度因素对河段尺度上HEF表达的重要性。这一概念框架将有助于开发方法来解释不同尺度上的次生生物交换，推断尺度关系，并为流域管理决策提供信息。
Abstract. Rivers are not isolated systems but interact continuously with groundwater from their confined headwaters to their wide lowland floodplains. In the last few decades, research on the hyporheic zone (HZ) has increased appreciation of the hydrological importance and ecological significance of connected river and groundwater systems. While recent studies have investigated hydrological, biogeochemical and ecohydrological processes in the HZ at bedform and reach scales, a comprehensive understanding of process-based interactions between factors operating at different spatial and temporal scales driving hyporheic exchange flows (HEFs) at reach scale and larger is still missing. Therefore, this review summarizes the factors and processes at catchment, valley, and reach scales that interact to control spatial and temporal variations in hyporheic exchange flows. By using a multi-scale perspective, this review connects field observations and modelling studies to identify the process driving patterns and dynamics of HEF. Finally, the influence of process interactions over multiple spatial scales is illustrated in a case study, supported by new GIS analyses, which highlights the importance of valley-scale factors to the expression of HEF at the reach scale. This conceptual framework will aid the development of approaches to interpret hyporheic exchange across scales, infer scaling relationships, and inform catchment management decisions.