Digital image analysis for studying eco-hydraulic processes in open channels

Abstract : The long-distance dispersal of weeds through open water channels has been poorly studied despite its primary importance for understanding weed spread in agro-ecosystems and its negative impacts on crop production. We proposed here an experimental study focusing on the quantification of external factors affecting the seed dispersal kernel during an irrigation event in a vegetated channel. We chose Johnsongrass seeds, one the most widespread weeds in the world that affects production of high-quality hay in permanent grasslands. We used a photogrammetric approach combined to differential GPS surveys to finely estimate the external factors susceptible to affect seed dispersal, either biotic or abiotic. We used fluorescent powders to efficiently detect the seeds after a dispersal event using UV lights.
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https://hal.archives-ouvertes.fr/hal-01816131
Contributeur : Jean-Stéphane Bailly <>
Soumis le : jeudi 14 juin 2018 - 18:14:13
Dernière modification le : mardi 26 juin 2018 - 15:20:12

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  • HAL Id : hal-01816131, version 1

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F. Vinatier, G Rudi, Jean-Stéphane Bailly, G. Belaud. Digital image analysis for studying eco-hydraulic processes in open channels. 5th IAHR Europe congress, Jun 2018, Trento, Italy. 〈hal-01816131〉

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