Hydro-geomorphological modelling of leaky wooden dam efficacy from reach to catchment scale with CAESAR-Lisflood 1.9j

Geoscientific model development, Journal Year: 2025, Volume and Issue: 18(5), P. 1395 - 1411

Published: March 5, 2025

Abstract. Leaky wooden dams (LDs) are woody structures installed in headwater streams that aim to reduce downstream flood risk through increasing in-channel roughness and decreasing river longitudinal connectivity order desynchronise peaks within catchments. Hydrological modelling of these omits sediment transport processes since the impact on flow routing is considered negligible comparison in-stream hydraulics. Such also excluded grounds computational expense. Here we present a study advances our ability model leaky roughness-based representation landscape evolution CAESAR-Lisflood, introducing flexible representative approach simulating LDs reach broader catchment-scale processes. The hydrological geomorphological sensitivity tested against grid resolution variability key parameters such as dam gap size roughness. influence isolation from whilst evaluating expense, domain outputs, internal evolution. findings show increased volume water stored test (channel length 160 m) by up an magnitude, it reduced discharge 31 % during storm event (6 h, 1-in-10-year event). We demonstrate how this due acting induce geomorphic change thus channel When considering larger resolutions, however, results care must be overestimations localised scour deposition behavioural approaches should adopted when using CAESAR-Lisflood absence robust empirical validation data.

Language: Английский

Potential use of wood addition for restoring ecosystem metabolism and nutrient uptake in a subtropical river

Ecohydrology & Hydrobiology, Journal Year: 2025, Volume and Issue: unknown, P. 100665 - 100665

Published: May 1, 2025

Language: Английский