Scale Dependency of parameters of Solute Transport Throgh Unsaturated Soil and Preferential Flow

非饱和土溶质运移参数的尺度依赖性和优先流

• 批准号: 12650508
• 负责人: SAKAMOTO Yasuhi
• 金额: $ 2.24万
• 依托单位: Yamanashi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650508/
• 关键词: Unsaturated soil; soute transport; scale dependency; predereutial flow; 浸透実験; 選択流; クリッギング; スケール依存性; 不飽和層; 浸透のパラメータ; 溶質移動

1.PurposesFor the analysis of groundwater pollution, it is most difficult to estimate the parameters of solute transport through unsaturated soil. The parameters may have scale dependency and be influenced by preferential flow. The purposes of this project is to analyze the characteristics of the parameters, their scale dependency and the relationship between the parameters and preferential flow.2.MethodsWe examined the vertical and horizontal scale dependency by the experiments using the unsaturated media column. The quality of discharge water was determined and the parameters of convection-dispersion equation were calculated For the vertical scale dependency, the parameters were related with the soil characteristics which make the preferential flow and immobile water. For the horizontal scale dependency, the parameters were examined geostatistically and the interpolated values of parameters were made by kriging and examined for the diversity index and the fractal dimension of spatial distribution.3. ResultsFor the vertical scale dependency, the results showed that the parameters have scale dependency I for the unsaturated media composed with big particles which produce preferential flow and that aggregated soil has the scale dependency different from that of non-aggregated particles. For the horizontal scale dependency, the results showed that the convection-dispersion parameters have scale dependency and that the diversity index and the fractal dimension of spatial distribution of parameters were effective tools for characterizing the interpolated values of the parameters and the score of principal component of the parameters.

项目成果

竹花智章,坂本康,西田継: "不飽和鉛直浸透のパラメータにおけるスケール依存性の実験的研究"土木学会第55回年次学術講演会講演概要集第7部. Vol.55. VII-184 (2000)

Tomoaki Takehana、Yasushi Sakamoto、Tsugumi Nishida：“非饱和垂直渗流参数的尺度依赖性的实验研究”第 55 届学术年会，日本土木工程师学会，第 7 部分。第 55 卷。VII-184（2000 年）

竹花智章,坂本康: "不飽和鉛直浸透のパラメータにおけるスケール依存性について"地下水・土壌汚染とその防止対策に関する研究集会第7回講演集. 3-6 (2000)

Tomoaki Takehana，Yasushi Sakamoto：“关于非饱和垂直渗流参数的尺度依赖性”第七届地下水/土壤污染及其预防措施研究会议论文集3-6（2000）。