globalchange  > 气候变化与战略
DOI: 10.5194/hess-24-1081-2020
论文题名:
Using hydrological and climatic catchment clusters to explore drivers of catchment behavior
作者: Jehn F.U.; Bestian K.; Breuer L.; Kraft P.; Houska T.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期:3
起始页码: 1081
结束页码: 1100
语种: 英语
Scopus关键词: Runoff ; Catchment response ; Climate signals ; Ecoregions ; Equifinality ; Low flow ; Mean flow ; Seasonality ; Catchments ; climate classification ; climate modeling ; data set ; ecoregion ; extreme event ; low flow ; seasonality
英文摘要: The behavior of every catchment is unique. Still, we seek for ways to classify them as this helps to improve hydrological theories. In this study, we use hydrological signatures that were recently identified as those with the highest spatial predictability to cluster 643 catchments from the CAMELS dataset. We describe the resulting clusters concerning their behavior, location and attributes. We then analyze the connections between the resulting clusters and the catchment attributes and relate this to the co-variability of the catchment attributes in the eastern and western US. To explore whether the observed differences result from clustering catchments by either climate or hydrological behavior, we compare the hydrological clusters to climatic ones. We find that for the overall dataset climate is the most important factor for the hydrological behavior. However, depending on the location, either aridity, snow or seasonality has the largest influence. The clusters derived from the hydrological signatures partly follow ecoregions in the US and can be grouped into four main behavior trends. In addition, the clusters show consistent low flow behavior, even though the hydrological signatures used describe high and mean flows only. We can also show that most of the catchments in the CAMELS dataset have a low range of hydrological behaviors, while some more extreme catchments deviate from that trend. In the comparison of climatic and hydrological clusters, we see that the widely used Köppen-Geiger climate classification is not suitable to find hydrologically similar catchments. However, in comparison with novel, hydrologically based continuous climate classifications, some clusters follow the climate classification very directly, while others do not. From those results, we conclude that the signal of the climatic forcing can be found more explicitly in the behavior of some catchments than in others. It remains unclear if this is caused by a higher intra-catchment variability of the climate or a higher influence of other catchment attributes, overlaying the climate signal. Our findings suggest that very different sets of catchment attributes and climate can cause very similar hydrological behavior of catchments-a sort of equifinality of the catchment response. © 2020 Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162771
Appears in Collections:气候变化与战略

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作者单位: Jehn, F.U., Institute for Landscape Ecology and Resources Management (ILR), Research Centre for BioSystems, Land Use and Nutrition (IFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, Giessen, 35390, Germany; Bestian, K., Institute for Landscape Ecology and Resources Management (ILR), Research Centre for BioSystems, Land Use and Nutrition (IFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, Giessen, 35390, Germany; Breuer, L., Institute for Landscape Ecology and Resources Management (ILR), Research Centre for BioSystems, Land Use and Nutrition (IFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, Giessen, 35390, Germany, Centre for International Development and Environmental Research (ZEU), Justus Liebig University Giessen, Senckenbergstraße 3, Giessen, 35392, Germany; Kraft, P., Institute for Landscape Ecology and Resources Management (ILR), Research Centre for BioSystems, Land Use and Nutrition (IFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, Giessen, 35390, Germany; Houska, T., Institute for Landscape Ecology and Resources Management (ILR), Research Centre for BioSystems, Land Use and Nutrition (IFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, Giessen, 35390, Germany

Recommended Citation:
Jehn F.U.,Bestian K.,Breuer L.,et al. Using hydrological and climatic catchment clusters to explore drivers of catchment behavior[J]. Hydrology and Earth System Sciences,2020-01-01,24(3)
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