SOFTWARE DEVELOPMENT OF A MULTISTEP WORKFLOW FOR ASSESSING LANDFILL GAS SURFACE EMISSIONS FROM SAMPLING DESIGN TO GEOSTATISTICAL MODELING

摘要

INERIS and ISSeP have been working together on methodological aspects related to the assessment and the cartography of fugitive landfill biogas fluxes, in collaboration with KIDOVA and Ephesia who provided expertise on geostatistics. In order to obtain more reliable assessment of global and local landfill gas (LFG) surface emissions through landfill covers, Instantaneous Flux Measurement (IFM) as well as a two step sampling strategy have been used. This sampling strategy has been implemented by ISSeP and INERIS and compared favorably with other strategies. A multistep approach has been devised by ISSeP, INERIS and KIDOVA as a workflow to design sampling plans, to carry out data processing and to estimate local and global LFG emissions using statistical and geostatistical methods. Data coming from different steps of a case study were compared in order to provide the necessary information about methane surface emissions.