University of Oulu

Torabi Haghighi, A., & Kløve, B. (2015). A sensitivity analysis of lake water level response to changes in climate and river regimes. Limnologica, 51, 118–130.

A sensitivity analysis of lake water level response to changes in climate and river regimes

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Author: Torabi Haghighi, Ali1; Kløve, Bjørn1
Organizations: 1Water Resources and Environmental Engineering Research Group, Faculty of Engineering, University of Oulu, PO Box 4300, FIN-90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.3 MB)
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Language: English
Published: Elsevier, 2015
Publish Date: 2017-03-10


Lake water level regimes are influenced by climate, hydrology and land use. Intensive land use has led to a decline in lake levels in many regions, with direct impacts on lake hydrology, ecology and ecosystem services. This study examined the role of climate and river flow regime in controlling lake regimes using three different lakes with different hydraulic characteristics (volume-inflow ratio, CIR). The regime changes in the lakes were determined for five different river inflows and five different climate patterns (hot-arid, tropical, moderate, cold-arid, cold-wet), giving 75 different combinations of governing factors in lake hydrology. The input data were scaled to unify them for lake comparisons. By considering the historical lake volume fluctuations, the duration (number of months) of lake volume in different ‘wetness’ regimes from ‘dry’ to ‘wet’ was used to develop a new index for lake regime characterisation, ‘Degree of Lake Wetness’ (DLW). DLW is presented as two indices: DLW₁, providing a measure of lake filling percentage based on observed values and lake geometry, and DLW₂, providing an index for lake regimes based on historical fluctuation patterns. These indices were used to classify lake types based on their historical time series for variable climate and river inflow. The lake response time to changes in hydrology or climate was evaluated. Both DLW₁ and DLW₂ were sensitive to climate and hydrological changes. The results showed that lake level in high CIR systems depends on climate, whereas in systems with low CIR it depends more on river regime.

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Series: Limnologica
ISSN: 0075-9511
ISSN-E: 1873-5851
ISSN-L: 0075-9511
Volume: 51
Pages: 118 - 130
DOI: 10.1016/j.limno.2015.02.001
Type of Publication: A1 Journal article – refereed
Field of Science: 218 Environmental engineering
Dataset Reference: The following are the supplementary data to this article:
Copyright information: © 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http:/