气候变化领域集成服务门户(CCPortal): Hydrological signatures describing the translation of climate seasonality into streamflow seasonality

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DOI	10.5194/hess-24-561-2020
	Hydrological signatures describing the translation of climate seasonality into streamflow seasonality
	Gnann S.J.; Howden N.J.K.; Woods R.A.
发表日期	2020
ISSN	1027-5606
起始页码	561
结束页码	580
卷号	24 期号:2
英文摘要	Seasonality is ubiquitous in nature, and it is closely linked to water quality, ecology, hydrological extremes, and water resources management. Hydrological signatures aim at extracting information about certain aspects of hydrological behaviour. Commonly used seasonal hydro-climatological signatures consider climate or streamflow seasonality, but they do not consider how climate seasonality translates into streamflow seasonality. In order to analyse the translation of seasonal climate input (precipitation minus potential evapotranspiration) into seasonal catchment output (streamflow), we represent the two time series by their seasonal (annual) Fourier mode, i.e. by sine waves. A catchment alters the input sine wave by reducing its amplitude and by shifting its phase. We propose to use these quantities, the amplitude ratio and the phase shift, as seasonal hydrological signatures. We present analytical solutions describing the response of linear reservoirs to periodic forcing to interpret the seasonal signatures in terms of configurations of linear reservoirs. Using data from the UK and the US, we show that the seasonal signatures exhibit hydrologically interpretable patterns and that they are a function of both climate and catchment attributes. Wet, rather impermeable catchments hardly attenuate the seasonal climate input. Drier catchments, especially if underlain by a productive aquifer, strongly attenuate the input sine wave leading to phase shifts up to several months. As an example application, we test whether two commonly used hydrological models (Identification of unit Hydrographs and Component flows from Rainfall, Evaporation and Streamflow - IHACRES; modèle du Génie Rural à 4 paramètres Journalier - GR4J) can reproduce the observed ranges of seasonal signatures in the UK. The results show that the seasonal signatures have the potential to be useful for catchment classification, predictions in ungauged catchments, and model building and evaluation. The use of potential evapotranspiration in the input restricts the applicability of the signatures to energy-limited (humid) catchments. © 2020 BMJ Publishing Group. All rights reserved.
语种	英语
scopus关键词	Aquifers; Catchments; Evapotranspiration; Fourier series; Runoff; Stream flow; Water quality; Catchment classifications; Climate seasonality; Extracting information; Hydrological extremes; Hydrological models; Potential evapotranspiration; Ungauged catchment; Water resources management; Reservoirs (water); aquifer; humid environment; hydrological modeling; potential evapotranspiration; reservoir; seasonal variation; seasonality; streamflow; United Kingdom
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159507
作者单位	Gnann, S.J., Department of Civil Engineering, University of Bristol, Bristol, United Kingdom; Howden, N.J.K., Department of Civil Engineering, University of Bristol, Bristol, United Kingdom; Woods, R.A., Department of Civil Engineering, University of Bristol, Bristol, United Kingdom
推荐引用方式 GB/T 7714	Gnann S.J.,Howden N.J.K.,Woods R.A.. Hydrological signatures describing the translation of climate seasonality into streamflow seasonality[J],2020,24(2).
APA	Gnann S.J.,Howden N.J.K.,&Woods R.A..(2020).Hydrological signatures describing the translation of climate seasonality into streamflow seasonality.Hydrology and Earth System Sciences,24(2).
MLA	Gnann S.J.,et al."Hydrological signatures describing the translation of climate seasonality into streamflow seasonality".Hydrology and Earth System Sciences 24.2(2020).