- 飽和・不飽和土壌特性データベースシステム

SVSOILS™ は土壌データベースで、6,200以上の土壌水分特性曲線データ、2,500以上の飽和透水係数データ、700以上の不飽和透水係数データが含まれています。このデータベースには、ユーザが計測した土壌データを追加していくことも可能です。また、様々な理論手法を用いて、浸透流解析や地熱解析に必要な土壌水分特性曲線(SWCC)や不飽和透水係数を推定・導出できます。


  • 検索可能な6,200 以上の土壌データ
  • 土壌水分特性曲線推定手法:9 種類(Fredlund and Xingモデル、van Genuchtenモデル、Brook and Coreyモデルなどを含む)
  • 飽和透水係数推定手法:15 種類(Beyerモデル、Hazen'sモデル、Krugerモデルなどを含む)
  • 不飽和透水係数推定手法:10 種類(van Genuchtenモデル、Modified Campbellモデル、Mualemモデルなどを含む)
  • 「間隙空気-間隙水-土粒子」からなる三相混合の「体積-質量」特性を3つの計測値を用いて算出
  • 不飽和浸透流解析用に、不飽和土構成モデルをSVFLUX™にインポート
  • 地盤沈下解析モデル用の特性フィットと推定
  • オイルサンドテーリング特性の推定


  • 粒子径データに基づく圃場容水量と毛管上昇高の推定
  • 土壌特性曲線の推定
  • 飽和透水係数の推定
  • 不飽和透水係数の推定


  • SVFLUX™にデータをインポートして浸透流解析を実行
  • SVHEAT™にデータをインポートして熱輸送解析を実行



SVSOILS is a valuable program which assists in the design of soil cover systems for waste management faculties such as landfills, tailing deposits and waste rock dumps. In many cases the soil-water characteristic curves and hydraulic conductivity values for the potential soils which may be used for construction are not available during the early stages of design. We use SVSOILS to estimate the properties on the basis of the grain-size distribution and other simple index properties. This allows preliminary analysis to proceed almost immediately. The optimum soils may be selected for the more detailed and time-consuming testing. In many cases it is possible to provide a complete design while testing only a limited number of samples to confirm soil properties.

G.W. Wilson, Ph.D.
Department of Civil Engineering
University of British Columbia

The power of SVSOILS is in its large database of soil-water characteristic curves, and the fact that this database can be added to by the user. The "query" option allows grouping of soils with similar characteristics, such as grain-size distribution and classification. SoilVision is a valuable tool for use in unsaturated soil studies.

Claudia E. Zapata, Ph.D.
Arizona State University

I am currently using SVSOILS to estimate hydraulic conducitivity in areas where we have limited soil data and usually only estimates of soil texture. We are using the database of similar textures to interpolate soil moisture curves for input into drainage models to estimate impacts of drainage ditches to nearby wetland hydrology.

Chris Noble,
Geotechnical Engineer