SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Multi-objective calibration for comparing channel sediment routing models in SWAT 
Authors:Lu, S., N. Kayastha, H. Thodsen, A. van Griensven and H.E. Andersen 
Journal:Journal of Environmental Quality 
Article ID: 
URL (non-DOI journals): 
Broad Application Category:hydrologic & pollutant 
Primary Application Category:calibration, sensitivity, and/or uncertainty analysis 
Secondary Application Category:sediment loss and transport 
Watershed Description:4.28 km^2 Lillebaek on the island of Funen in Denmark 
Calibration Summary: 
Validation Summary: 
General Comments:This article is part of a JEQ special SWAT section. 
Abstract:Sediment transport is important for ecology and water quality in receiving waters. Physically based channel erosion methods were implemented in the Soil and Water Assessment Tool version 2009 (SWAT2009) in order to improve sediment concentration (SS) results. In the study, the default simplified Bagnold sediment routing method (EQN-0) and the physically based simplified Bagnold sediment routing method (EQN-1) were compared with Pareto fronts from multi-objective calibration. Two SWAT models using EQN-0 and EQN-1 were set up for a small agricultural Danish catchment, and calibrated with multiobjective calibration on daily flow and weekly flow weighted SS (WF SS). Results showed that the Pareto front of EQN-1 was slightly closer to the optimal point than EQN-0 in the objective space. Trade-off between WF SS and daily flow in EQN-1 was smaller than in EQN-0. EQN-0 generated more surface erosion to improve WF SS. EQN-1 generated more base flow to improve WF SS. EQN-1 was not dependent on surface erosion and simulated peak and low values of WF SS better than EQN-0. Therefore EQN-1 is more suitable than EQN-0 in modelling SS in small lowland catchments.