Communication Dans Un Congrès Année : 2025

Green House Gases Emissions from 15 years old artificial wetland: 1.5 years of field monitoring

Résumé

Artificial wetlands provide several ecological services. In a first step, the artificial wetland of Rampillon was built in 2010, to mitigate non point source pollution from agricultural area. Indeed the artificial wetland intercepts surface flows from subsurface drained area characterized by intensive agriculture in East part of Paris. Several studies focused on nitrogen pesticides mitigation and showed average efficiencies about 15% and 40% nitrate and pesticides removal respectively. This restored area constitutes also a refuge for biodiversity leading this area to be considered as a nature based solution: a net gain of species was highlighted. A new question raises about green house gases emissions. In order to assess the emissions, we set up a protocol, in the frame of Alfawetlands Horizon project (www.alfawetlands.eu), to quantify the fluxes of N2O, CH4 and CO2 based on bimonthly monitoring of accumulation chambers. Gas from floating chambers were sampled every 15 min from 0 to 45 min. 8 points distributed on the 0.5ha of artificial wetland were distributed on the surface area. For each point, water level, pH, dissolved oxygen, temperature, electrical conductivity, anions/cations and total organic and inorganic were analysed. Starting in September 2023 to February 2025, we analysed fluxes for different seasons and hydriperiods. Relationships with parameters are interpreted to propose rules to manage artificial weltand in agricultural area to limit green house gases emissions.

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Dates et versions

hal-05607618 , version 1 (30-04-2026)

Identifiants

  • HAL Id : hal-05607618 , version 1

Citer

Tom Saade, Julien Tournebize, Cédric Chaumont, Sören Francois, Kaido Soosaar. Green House Gases Emissions from 15 years old artificial wetland: 1.5 years of field monitoring. INTECOL 2025 - 12th Intecol Wetlands Conference, International Association for Ecology; University of Tartu, Estonia; Society of Wetland Scientists Europe Chapter, Jun 2025, Tartu, Estonia. p. 64. ⟨hal-05607618⟩
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