| Author | 吉崎 文人| 黒田 訓宏| Miura, Takeshi| Moroizumi, Toshitsugu| |
|---|---|
| Published Date | 2004-07-01 |
| Publication Title | 岡山大学農学部センター報告 |
| Volume | volume26 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/fest/11537 |
|---|---|
| Title Alternative | Long-term Change Trend of Climate at Aomori City |
| FullText URL | 006_081_084.pdf |
| Author | Moroizumi, Toshitsugu| Sato, Yuichi| Sato, Koichi| Miura, Takeshi| |
| Abstract | Characteristics of long-term change for air temperature, precipitation and snowfall-depth at Aomori city were analyzed with data during the 111 years, from 1886 to 1996. The typical results were as follows: (1) The increasing rate of the annual mean air temperature was 1.07℃/111 year. (2) The increasing rate of the monthly minimum air temperature was larger than that of the monthly maximum air temperature. (3) The increasing rate of the monthly air temperature was large from winter to spring, however, was not so from summer to autumn. (4) The decreasing rate of annual precipitation was 0.187 mm/year. (5) The 5-year moving average of annual snowfall-depth might indicate the existence of about 10-year period. |
| Keywords | Air temperature precipitation snowfall-depth long-term change Aomori city |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2001-02-28 |
| Volume | volume6 |
| Issue | issue1 |
| Start Page | 81 |
| End Page | 84 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313378 |
| JaLCDOI | 10.18926/fest/11536 |
|---|---|
| Title Alternative | Long-term Trend of Rainfall at Tsudaka Farm of Okayama University |
| FullText URL | 007_107_111.pdf |
| Author | Moroizumi, Toshitsugu| Yomota, Atsushi| Miura, Takeshi| |
| Abstract | Characteristics of long-term change in rainfall at Tsudaka Farm of Okayama University were analyzed with data during the 20 years, from 1979 to 1998. The typical results were as follows: (1) The average of annual rainfall was 1203 mm at average, 1726 mm at maximum, and 666 mm at minimum. (2) The decreasing rate of the annual rainfall was 5.37 mm/year. (3) Trend of rainfall intensity in each rainfall duration showed an increase of which rate were 0.005~0.256 mm/h/year, contrary to the annual trend. (4) Rainfall intensities in n-years probability were estimated using the maximum rainfall intensity for each rainfall duration. |
| Keywords | Rainfall Rainfall intensity Rainfall duration Talbot formula Long-term trend Tsudaka Farm of Okayama University |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2002-03-22 |
| Volume | volume7 |
| Issue | issue1 |
| Start Page | 107 |
| End Page | 111 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313813 |
| 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 |
