@article{oai:sucra.repo.nii.ac.jp:00016428, author = {川本, 健 and 海野, 将孝 and 飯塚, 健仁 and 小松, 登志子}, journal = {埼玉大学工学部紀要 第一部 論文集}, month = {}, note = {The soil-gas diffusion coefficient (Dp) and its dependency on air-filled porosity (ε) govern the gas diffusion and reaction processes in soil. Accurate Dp(ε) prediction models for unsaturated saturated peat soils are needed to evaluate vadose zone transport and fate of greenhouse gases such as methane in peaty wetlands. In this study, we measured Dp on peat soil samples at different pF conditions, and developed new expressions for describing and predicting Dp(ε). Undisturbed peat soil samples were taken from Bibai wetland, Hokkaido, Japan. By modifying existing Dp(ε) models, the Buckingham model and the Macroporosity-Dependent model, we suggested two new Dp(ε) models for peat soils. To validate the new Dp(ε) models, we tested the models against independent datasets for peat soil samples from literatures. The modified Buckingham type model performed the best against independent datasets., text, application/pdf}, pages = {19--24}, title = {不飽和泥炭土のガス拡散係数の測定と予測モデルの構築・検証<論文>}, volume = {42}, year = {2008}, yomi = {カワモト, ケン and ウンノ, マサタカ and イイズカ, ケンジ and コマツ, トシコ} }