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Evaluating the effects of alternative model structures on dynamic storage simulation in heterogeneous boreal catchments

Karimi, Shirin and Seibert, Jan and Laudon, Hjalmar (2022). Evaluating the effects of alternative model structures on dynamic storage simulation in heterogeneous boreal catchments. Hydrology research. 53 :4 , 562-583
[Research article]

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Estimating dynamic storage as a metric can be used to make an overall assessment of catchment resilience to extreme weather events such as droughts and floods. Because of the complexity of direct empirical measurements, bucket-type hydrological models can be a suitable tool to simulate the catchment storage across a broad range of scales as they require minimal input data. However, these models consist of one or more conceptual structures based on several linear or nonlinear reservoirs and connections between these reservoirs. Therefore, choosing the most appropriate model structure to represent storage-discharge functioning in catchments is difficult. To bridge this gap, this study evaluated the performance of three different HBV model structures on 14 heterogeneous boreal catchments classified into four distinct catchment categories. The results showed that the three-bucket structure performed better in larger catchments with deeper sediment soils. In contrast, a single reservoir structure is sufficient to predict the storage-discharge behavior for a lake-influenced catchment with lower elevation above the stream network. Moreover, our results indicate that while the estimates of mean catchment storage varied between the different model structures, the ranking between the catchments largely agreed for the different structures. Hence, our results suggest that instead of a single model structure, using an ensemble averaging approach would not only better address the structural uncertainty but also facilitate further storage comparison between different catchments. Finally, based on Spearman rank correlation results, we found that catchment size and sediment soil were positively correlated with dynamic storage estimation.

Authors/Creators:Karimi, Shirin and Seibert, Jan and Laudon, Hjalmar
Title:Evaluating the effects of alternative model structures on dynamic storage simulation in heterogeneous boreal catchments
Series Name/Journal:Hydrology research
Year of publishing :2022
Page range:562-583
Number of Pages:22
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
Keywords:boreal, bucket-type, dynamic storage, ensemble, HBV, hydrological models, storage-discharge
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Additional ID:
Type of IDID
Web of Science (WoS)000780172200001
ID Code:28116
Faculty:S - Faculty of Forest Sciences
NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(S) > Dept. of Forest Ecology and Management
(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:30 May 2022 08:59
Metadata Last Modified:30 May 2022 09:01

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