TY  - JOUR
AU  - Leeuwen, Z. R. van
AU  - Klaar, M. J.
AU  - Smith, M. W.
AU  - Brown, L. E.
PY  - 2024//
TI  - Quantifying the natural flood management potential of leaky dams in upland catchments, Part II: Leaky dam impacts on flood peak magnitude
JO  - Journal of Hydrology
SP  - 130449
VL  - 628
KW  - Nature based solutions
KW  - Large wood
KW  - Empirical
KW  - Hydrograph analysis
KW  - Ecosystem services
KW  - Transfer function noise model
N2  - Leaky dams are an increasingly popular natural flood management measure, yet their impacts on flood peak magnitude have not yet been empirically quantified for a range of event types and magnitudes, even at the stream scale. In this study, the novel application of a transfer function noise modelling approach to empirical Before-After-Control-Impact stage data from an upland catchment allowed leaky dam effectiveness in reducing flood peak magnitude to be quantified. Flood peak stage and discharge magnitude changes were assessed from empirical data for 50 single and multi-peaked high flow events with return periods ranging from less than one year to six years. Overall, event peak magnitude was significantly reduced following the installation of eight leaky dams on the impact stream. Effectiveness was highly variable, but on average, flood peak magnitude was reduced by 10% for events with a return period up to one year. Some of the variability was explained by the size of the event and whether it was a single or multi-peaked event. This finding emphasises the need to manage expectations by considering both a range of event magnitudes and types when designing or assessing leaky dam natural flood management schemes.
SN  - 0022-1694
UR  - https://www.sciencedirect.com/science/article/pii/S0022169423013914
N1  - exported from refbase (http://www.uhydro.de/base/show.php?record=228), last updated on Thu, 01 Feb 2024 22:03:30 +0100
ID  - Leeuwen_etal2024
ER  -