Sensitivity analysis of distributed erosion models: Framework

Cheviron, Bruno; Bissonnais, Yves Le; Moussa, Roger; Raclot, Damien

doi:10.1029/2009wr007950

Cited by 11 publications

(16 citation statements)

References 54 publications

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“…Furthermore, sensitivity analyses performed by Cheviron et al . () revealed that the most sensitive parameters of MHYDAS‐Erosion were K s , N rill , K r and A s . The evaluation metrics used to assess model calibration are introduced in Table .…”

Section: Methodsmentioning

confidence: 97%

Modeling the sediment yield and the impact of vegetated filters using an event-based soil erosion model-a case study of a small Canadian watershed

et al. 2016

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This paper presents the first application of the event‐based MHYDAS‐Erosion model to a small agricultural watershed under temperate climate conditions (Quebec, Canada). Simulation results based on observed and synthetic rainfall events revealed a bimodal behaviour of sediment yield. During high‐intensity rainfall events, most of the sediments reaching the watershed outlet originate from cropland. Meanwhile, during low‐intensity events, most of the sediments come from the drainage network. Furthermore, simulation results show that implementation of 5‐m and 20‐m wide vegetated filters throughout the watershed or at the edge of the most problematic fields (4% of the total fields) could reduce soil loss by 52% and 31%, respectively. The modeling framework could be used for the design and location of beneficial management practices such as grass strips and riparian zones Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Methodsmentioning

confidence: 97%

Modeling the sediment yield and the impact of vegetated filters using an event-based soil erosion model-a case study of a small Canadian watershed

et al. 2016

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“…These values may be calculated using the DEM if available, or they can be informed by field observations. Sensitivity analyses performed by Cheviron et al (2010) identified the most sensitive parameters for MHYDAS‐Erosion: ks, N rill , K r and A s .…”

Section: Model Descriptionmentioning

confidence: 99%

A Versatile and Robust Vesicle Based on a Photocleavable Surfactant for Two‐Photon‐Tuned Release

Dong

Xun

Zeng

et al. 2013

Chemistry A European J

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A small amphiphile that contains a coumarin unit and alkynyl groups, as a two-photon-cleavable segment and polymerizable groups, respectively, was designed and synthesized. The amphiphile showed a critical aggregation concentration of about 4.6×10(-5) M and formed a vesicle-type assembly. The formed vesicles were stabilized by in situ "click" polymerization without altering their morphology. Hydrophobic and hydrophilic guests can be encapsulated within the vesicle membrane and inside the aqueous core of the vesicle, respectively. The loaded guests can be released from the vesicle by using UV or near-IR stimuli, through splitting up the amphiphilic structure of the amphiphile. Distinguished dose-controlled photorelease of the polymeric vesicle is achieved with the maintenance of vesicular integrity, which makes the guest release dependent on the amount of cleavage of the amphiphilic structure during irradiation. This study provides a potential strategy for the development of versatile and stable drug-delivery systems that offer sustained and photo-triggered release.

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Section: Model Input Parametersmentioning

confidence: 99%

MHYDAS-Erosion: a distributed single-storm water erosion model for agricultural catchments

et al. 2010

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Abstract:In this paper, we present MHYDAS-Erosion, a dynamic and distributed single-storm water erosion model developed as a module of the existing hydrological MHYDAS model. As with many catchment erosion models, MHYDAS-Erosion is able to simulate sediment transport, erosion and deposition by rill and interrill processes. Its originality stems from its capacity to integrate the impact of land management practices (LMP) as key elements controlling the sedimentological connectivity in agricultural catchments. To this end, the water-sediment pathways are first determined by a specific process-oriented procedure defined and controlled by the user, which makes the integration of LMP easier. The LMP dynamic behaviours are then integrated into the model as a time-dependent function of hydrological variables and LMP characteristics. The first version of the model was implemented for vegetative filters and tested using water and sediment discharge measurements at three nested scales of a densely instrumented catchment (Roujan, OMERE Observatory, southern France). The results of discharge and soil loss for simulated rainfall events have been found to acceptably compare with available data. The average R 2 values for water and sediment discharge are 0Ð82 and 0Ð83, respectively. The sensitivity of the model to changes in the proportion of LMP was assessed for a single rain event by considering three scenarios of the Roujan catchment management with vegetative filters: 0% (Scenario 1), 18% (Scenario 2, real case) and 100% (Scenario 3). Compared to Scenario 2 (real case), soil losses decreased for Scenario 3 by 65% on the agricultural plot scale, 62% on the sub-catchment scale and 45% at the outlet of the catchment and increased for Scenario 1 by 0% on the plot scale, 26% on the sub-catchment scale and 18% at the outlet of the catchment.

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Sensitivity analysis of distributed erosion models: Framework

Cited by 11 publications

References 54 publications

Modeling the sediment yield and the impact of vegetated filters using an event-based soil erosion model-a case study of a small Canadian watershed

Modeling the sediment yield and the impact of vegetated filters using an event-based soil erosion model-a case study of a small Canadian watershed

A Versatile and Robust Vesicle Based on a Photocleavable Surfactant for Two‐Photon‐Tuned Release

MHYDAS-Erosion: a distributed single-storm water erosion model for agricultural catchments

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