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Mapping methane emissions from the three gorges reservoir area: A feasibility study
Hu Yong
School of Resource and Environmental Science, Wuhan University,
Luoyu Road 129#, Wuhan City, 430079,P.R.China
Email: yonghu@itc.nl
Abstract
The concern about the emissions of methane from flooded lands as a result of constructing huge dam has been expressed while no scientific study on the total amount and spatial distribution of CH4 emissions over the three gorges reservoir area is carried out yet. The feasibility of utilizing remote sensing (RS) data for mapping CH4 emissions from the three gorges reservoir area, China, is explored. Though direct derivation of methane emissions from satellite data is not reliable, there are a few successful examples using empirical models based on field measurements. By means of a RS approach, maps representing environmental variables relevant to methane emissions can be derived and then are combined to map and predict the methane emissions over the three gorges reservoir area. Soil moisture, soil temperature, slope, aspect, vegetation biomass and water depth are considered as key parameters targeted in this study. The result of this study shows the viability of remote sensing as a means of mapping and predicting methane emissions from inundated lands.
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