| JaLCDOI | 10.18926/fest/11507 |
|---|---|
| Title Alternative | Survey on Spatial Variability of Surface Soil Moisture and Soil Physical Properties in a Sloping Grassland Field |
| FullText URL | 008_081_085.pdf |
| Author | Moroizumi, Toshitsugu| |
| Abstract | Spatial variability of surface soil moisture, bulk density, satureted hydraulic conductivity, and penetration resistance (cone index) in a sloping grassland field were surveyed. The typical results were as follows: (1) The surface soil moisture and the bulk density were normally distributed at a significant level of 0.05. (2) The surface soil moistures were higher at low area than in high and slope area. The coefficients of variation were larger at slope area. (3) The coefficients of variation for bulk density were larger at slope area than in low area. (4) The distribution of saturated hydraulic conductivity can be considered to be log-normally distributed. (5) The cone index showed the normal distribution. |
| Keywords | Spatial variability Surface soil moisture Bulk density Saturated hydraulic conductivity Cone index |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2003-03 |
| Volume | volume8 |
| Issue | issue1 |
| Start Page | 81 |
| End Page | 85 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313346 |
| JaLCDOI | 10.18926/fest/11469 |
|---|---|
| Title Alternative | Measurement of thermal conductivity in soils and application of de Vries model |
| FullText URL | 009_117_120.pdf |
| Author | Moroizumi, Toshitsugu| Sato, Yuichi| Sato, Koichi| Sasaki, Choichi| |
| Abstract | Thermal conductivity of soil samples were measured using a twin transient-state cylindrical-probe method. The system of measurement consists of DC power supply, data logger, personal computer, 100cc soil sample, reference material sample, and two heat probes. The typical results were as follows: (1) Thermal conductivity of soils increased according to an increase of soil water content. (2) The thermal conductivity of Toyoura sand was larger than one of Kuroboku soil. (3) The thermal conductivity estimated by de Vries model had good agreement with the measured value. |
| Keywords | Thermal conductivity Twin transient-state cylindrical-probe method de Vries model Volumetric water content |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2004-02-27 |
| Volume | volume9 |
| Issue | issue1 |
| Start Page | 117 |
| End Page | 120 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313616 |
| JaLCDOI | 10.18926/fest/11440 |
|---|---|
| Title Alternative | Measurement of thermal conductivity in the soils of Shirakami Mountains |
| FullText URL | 011_089_092.pdf |
| Author | Hanzawa, Wakako| Moroizumi, Toshitsugu| Sasaki, Choichi| |
| Abstract | Thermal conductivity of soils in Shirakami Mountains that was registered on UNESCO's World Natural Heritage in 1993 were measured using a twin transient-state cylindrical-probe method. The typical results were as follows:(1) Thermal conductivity of the soils in Shirakami Mountains increased according to an increase of soil water content, which was the same tendency as the other soils. (2) The thermal conductivity of the soils was about 0.2～0.3 Wm(-1)K(-1) smaller than volcanic ash soils, and it showed the same tendency as leaf mold. |
| Keywords | Shirakami Mountains Thermal conductivity Twin transient-state cylindrical-probe method Volumetric water content |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2006-03-15 |
| Volume | volume11 |
| Issue | issue1 |
| Start Page | 89 |
| End Page | 92 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313628 |
