气候变化领域集成服务门户(CCPortal): Human influences on streamflow drought characteristics in England and Wales

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DOI	10.5194/hess-22-1051-2018
	Human influences on streamflow drought characteristics in England and Wales
	Tijdeman E.; Hannaford J.; Stahl K.
发表日期	2018
ISSN	1027-5606
起始页码	1051
结束页码	1064
卷号	22 期号:2
英文摘要	Human influences can affect streamflow drought characteristics and propagation. The question is where, when and why? To answer these questions, the impact of different human influences on streamflow droughts were assessed in England and Wales, across a broad range of climate and catchments conditions. We used a dataset consisting of catchments with near-natural flow as well as catchments for which different human influences have been indicated in the metadata (Factors Affecting Runoff) of the UK National River Flow Archive (NRFA). A screening approach was applied on the streamflow records to identify human-influenced records with drought characteristics that deviated from those found for catchments with near-natural flow. Three different deviations were considered, specifically deviations in (1) the relationship between streamflow drought duration and the base flow index, BFI (specifically, BFIHOST, the BFI predicted from the hydrological properties of soils), (2) the correlation between streamflow and precipitation and (3) the temporal occurrence of streamflow droughts compared to precipitation droughts, i.e. an increase or decrease in streamflow drought months relative to precipitation drought months over the period of record. The identified deviations were then related to the indicated human influences. Results showed that the majority of catchments for which human influences were indicated did not show streamflow drought characteristics that deviated from those expected under near-natural conditions. For the catchments that did show deviating streamflow drought characteristics, prolonged streamflow drought durations were found in some of the catchments affected by groundwater abstractions. Weaker correlations between streamflow and precipitation were found for some of the catchments with reservoirs, water transfers or groundwater augmentation schemes. An increase in streamflow drought occurrence towards the end of their records was found for some of the catchments affected by groundwater abstractions and a decrease in streamflow drought occurrence for some of the catchments with either reservoirs or groundwater abstractions. In conclusion, the proposed screening approaches were sometimes successful in identifying streamflow records with deviating drought characteristics that are likely related to different human influences. However, a quantitative attribution of the impact of human influences on streamflow drought characteristics requires more detailed case-by-case information about the type and degree of all different human influences. Given that, in many countries, such information is often not readily accessible, the approaches adopted here could provide useful in targeting future efforts. In England and Wales specifically, the catchments with deviating streamflow drought characteristics identified in this study could serve as the starting point of detailed case study research. © 2017 Author.
语种	英语
scopus关键词	Catchments; Drought; Groundwater; Groundwater flow; Reservoirs (water); Runoff; Underground reservoirs; Case informations; Case study research; Drought characteristics; Groundwater abstraction; Hydrological properties; Natural conditions; Screening approaches; Streamflow records; Stream flow; anthropogenic effect; baseflow; catchment; correlation; data set; drought; groundwater; groundwater abstraction; metadata; precipitation (climatology); reservoir; streamflow; England; United Kingdom; Wales
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/160127
作者单位	Tijdeman, E., Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany; Hannaford, J., Centre for Ecology and Hydrology, Wallingford, United Kingdom; Stahl, K., Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany
推荐引用方式 GB/T 7714	Tijdeman E.,Hannaford J.,Stahl K.. Human influences on streamflow drought characteristics in England and Wales[J],2018,22(2).
APA	Tijdeman E.,Hannaford J.,&Stahl K..(2018).Human influences on streamflow drought characteristics in England and Wales.Hydrology and Earth System Sciences,22(2).
MLA	Tijdeman E.,et al."Human influences on streamflow drought characteristics in England and Wales".Hydrology and Earth System Sciences 22.2(2018).