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Remote Sensing of River Discharge: A Review and a Framing for the Discipline
Remote Sensing ( IF 4.2 ) Pub Date : 2020-03-31 , DOI: 10.3390/rs12071107
Colin Gleason , Michael Durand

Remote sensing of river discharge (RSQ) is a burgeoning field rife with innovation. This innovation has resulted in a highly non-cohesive subfield of hydrology advancing at a rapid pace, and as a result misconceptions, mis-citations, and confusion are apparent among authors, readers, editors, and reviewers. While the intellectually diverse subfield of RSQ practitioners can parse this confusion, the broader hydrology community views RSQ as a monolith and such confusion can be damaging. RSQ has not been comprehensively summarized over the past decade, and we believe that a summary of the recent literature has a potential to provide clarity to practitioners and general hydrologists alike. Therefore, we here summarize a broad swath of the literature, and find after our reading that the most appropriate way to summarize this literature is first by application area (into methods appropriate for gauged, semi-gauged, regionally gauged, politically ungauged, and totally ungauged basins) and next by methodology. We do not find categorizing by sensor useful, and everything from un-crewed aerial vehicles (UAVs) to satellites are considered here. Perhaps the most cogent theme to emerge from our reading is the need for context. All RSQ is employed in the service of furthering hydrologic understanding, and we argue that nearly all RSQ is useful in this pursuit provided it is properly contextualized. We argue that if authors place each new work into the correct application context, much confusion can be avoided, and we suggest a framework for such context here. Specifically, we define which RSQ techniques are and are not appropriate for ungauged basins, and further define what it means to be ‘ungauged’ in the context of RSQ. We also include political and economic realities of RSQ, as the objective of the field is sometimes to provide data purposefully cloistered by specific political decisions. This framing can enable RSQ to respond to hydrology at large with confidence and cohesion even in the face of methodological and application diversity evident within the literature. Finally, we embrace the intellectual diversity of RSQ and suggest the field is best served by a continuation of methodological proliferation rather than by a move toward orthodoxy and standardization.

中文翻译:

河流流量的遥感:学科的回顾与框架

河流排放遥感(RSQ)是一个新兴的新兴领域。这项创新导致了高度非凝聚力的水文学子领域的快速发展,结果在作者,读者,编辑和审稿人中都出现了误解,误导和混乱。尽管RSQ从业者在知识上各不相同的子领域可以解决这种混乱,但更广泛的水文学界将RSQ视为一个整体,这种混乱可能会造成破坏。在过去的十年中,RSQ尚未得到全面的总结,我们认为,最近文献的总结有可能为从业者和一般水文学家提供清晰的信息。因此,我们在这里总结了大量文献,在我们阅读之后发现,总结该文献的最合适方法是首先按应用领域(适用于已测量,半测量,区域测量,政治上未控制和完全未测量的盆地的方法),其次是方法论。我们发现按传感器进行分类并不是有用的,这里考虑了从无人驾驶飞机(UAV)到卫星的所有内容。从我们的阅读中出现的最有说服力的主题也许是对背景的需求。所有RSQ都用于增进对水文的了解,我们认为,只要适当地结合了上下文,几乎所有RSQ都可用于这种追求。我们认为,如果作者将每项新作品放入正确的应用程序上下文中,则可以避免很多混乱,并且我们在此建议一个用于此类上下文的框架。特别,我们定义了哪些RSQ技术适用于未启用盆地的技术,以及哪些适用于未启用盆地的技术,并进一步定义了在RSQ背景下“未启用”的含义。我们还考虑了RSQ的政治和经济现实,因为该领域的目标有时是提供根据特定政治决策有目的地收集的数据。即使面对文献中明显的方法论和应用多样性,这种框架也可以使RSQ充满信心和凝聚力地对水文做出整体响应。最后,我们接受RSQ的知识多样性,并建议该领域最好的方法是继续进行方法学的扩展,而不是朝着正统和标准化的方向发展。我们还考虑了RSQ的政治和经济现实,因为该领域的目标有时是提供根据特定政治决策有目的地收集的数据。即使面对文献中明显的方法论和应用多样性,这种框架也可以使RSQ充满信心和凝聚力地对水文做出整体响应。最后,我们接受RSQ的知识多样性,并建议该领域最好的方法是继续进行方法学的扩展,而不是朝着正统和标准化的方向发展。我们还考虑了RSQ的政治和经济现实,因为该领域的目标有时是提供根据特定政治决策有目的地收集的数据。即使面对文献中明显的方法论和应用多样性,这种框架也可以使RSQ充满信心和凝聚力地对水文做出整体响应。最后,我们接受RSQ的知识多样性,并建议该领域最好的方法是继续进行方法学的扩展,而不是朝着正统和标准化的方向发展。即使面对文献中明显的方法论和应用多样性,这种框架也可以使RSQ充满信心和凝聚力地对水文做出整体响应。最后,我们接受RSQ的知识多样性,并建议该领域最好的方法是继续进行方法学的扩展,而不是朝着正统和标准化的方向发展。即使面对文献中明显的方法论和应用多样性,这种框架也可以使RSQ充满信心和凝聚力地对水文做出整体响应。最后,我们接受RSQ的知识多样性,并建议通过方法学的持续发展而不是朝着正统和标准化的方向来最好地服务于该领域。
更新日期:2020-03-31
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