Author 楊 冬梅| 岩田 徹| 三浦 健志|
Published Date 2003-12
Publication Title 岡山大学農学部センター報告
Volume volume25
Issue issue1
Content Type Departmental Bulletin Paper
Author 牛川 希望| Iwata, Tooru| Miura, Takeshi|
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
Author 猪原 幸子| Iwata, Tooru| Miura, Takeshi|
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
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
Author Moroizumi, Toshitsugu| Sasaki, Yumi| Miura, Takeshi|
Published Date 2008-12
Publication Title 環境制御
Volume volume30
Content Type Journal Article
JaLCDOI 10.18926/fest/11628
Title Alternative Secular changes of air temperature and precipitation in Okayama City.
FullText URL 001_163_168.pdf
Author Miura, Takeshi|
Abstract In this paper, secular changes of air temperature and the amount of precipitation in Okayama city are discussed using observed values at Okayama meteorologiccal station. Special reference is made to 1993 and 1994 in which peculiar changes occurred. The results obtained are summarized as follows: (1) The increasing rate of the annual mean air temperature at Okayama city is 0.85℃/100y. This value is nearly equal to the average of Japan; 0.87℃/100y. (2) The increasing rate indicates seasonal changes, and the rate is high especially in April and May. (3) The rapid increase of the air temperature in the 1980s is due to removal of Okayama meteorological station from the edge of town to the center. (4) The annual mean air temperature in 1994 is 16.9℃, and the monthly mean temperature for July and August are 29.8 and 29.6℃ respectively. These values are new records at the Okayama station. (5) The air temperature in July and August, 1993 are higher than in 1980 when it was much colder in the summer. (6) The amount of precipitation does not show any secular changes.
Keywords the air temperature secular changes Okayama city
Publication Title 岡山大学環境理工学部研究報告
Published Date 1996-03
Volume volume1
Issue issue1
Start Page 163
End Page 168
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313505
JaLCDOI 10.18926/fest/11635
FullText URL 001_169_179.pdf
Author Abenney-Mickson Stephen| Miura, Takeshi|
Abstract The SWAP93 model was used to predict how much capillary rise would occur in cropped fields. The experimental fields were located in a humid climate and it was thought that contribution from groundwater sources to total water use could be significant. In one field planted with soybean, the model predicted an average daily uptake of 1.3 mm; in another field planted with pumpkin, there was average daily uptake of 0.3 mm; and yet in a third field located in a vinyl house there was average daily uptake of 0.03 mm. These predictions represent about 38,7 and 1% contribution to total water use respectively. Even though there were no measured data to compare with, the results lie within the range of other works reported in the literature.
Keywords Crop water use capillary rise SWAP93 model groundwater
Publication Title 岡山大学環境理工学部研究報告
Published Date 1996-03
Volume volume1
Issue issue1
Start Page 169
End Page 179
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313364
Author Miura, Takeshi|
Published Date 2002-01
Publication Title Mathematical Journal of Okayama University
Volume volume44
Issue issue1
Content Type Journal Article
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 日本語
File Version publisher
NAID 120002313378
JaLCDOI 10.18926/fest/11460
Title Alternative Measurement of root system with growth of oriental pickling melon.
FullText URL 012_119_123.pdf
Author Hirano, Emi| Morimoto, Yuji| Miura, Takeshi|
Abstract It is important to clarify how the soil moisture changes by irrigation and how moisture is consumed by absorption of root, to plan irrigation appropriately in upland field. And, it is thought that clarifying the growth of the root can be important information in the water management, because the amount and the pattern of root water uptake change depending on the growth stage. However, there are not too much a lot of researches that measure the root, in addition, the example intended for crops of 'Gourd family (scientific name:Cucurbitaceae)' is not found. Therefore, for oriental pickling melon, it measured how for the root system to grow up as crop grew every three weeks. The results of this study may be summarized as: 1) Root amount increased with the growth of crops, and the majority of the root existed to 20cm in depth. A lot of rootlets with the role of water uptake existed outside of from 10 to 20cm. 2) Root length has grown up in horizontal and vertical direction at a dash at the stage of growing initial. 3) It was able to be confirmed to the growth of the ground part and the root that the length and amount either also had implications. Moreover, root amount and plant caver ratio drew similar curve.
Keywords root growth oriental pickling melon
Publication Title 岡山大学環境理工学部研究報告
Published Date 2007-03-15
Volume volume12
Issue issue1
Start Page 119
End Page 123
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313695
JaLCDOI 10.18926/fest/11462
Title Alternative Comparison of micrometeorological environments inside and outside an oriental pickling melon greenhouse.
FullText URL 012_125_130.pdf
Author Morimoto, Yuji| Hirano, Emi| Miura, Takeshi|
Abstract The use of greenhouses has rapidly increased after 1965, and the area became 11 times of 1965 as of 2001. Meteorological conditions and soil moisture environments inside a greenhouse are significantly different from those in the open field. These differences should be understandable to establish accurate predictions of water consumption and evapotranspiration inside a greenhouse which play important roles in the design of any irrigation system. This study aims to estimate the micrometeorological conditions inside an oriental pickling melon greenhouse which can be used for evapotranspiration calculations. Therefore, micrometeorological data were measured inside and outside the greenhouse for the comparison purposes. The results of this study may be summarized as: (1) Solar radiation inside the greenhouse was decreased about 30% of that of outside it by plastic film and frame. (2) Net radiation during the daytime inside the greenhouse was almost the same as the absorbed total short-wave radiation. (3) The difference of daytime mean air temperature inside and outside the greenhouse was between 3 and 4 degree Celsius in day average. (4) Both relative humidity and saturation deficit inside the greenhouse were higher than outside, and those were affected by ventilation. (5) Wind speed inside the greenhouse was greatly affected by opening rate of the house side.
Keywords greenhouse micrometeorology oriental pickling melon
Publication Title 岡山大学環境理工学部研究報告
Published Date 2007-03-15
Volume volume12
Issue issue1
Start Page 125
End Page 130
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313863
JaLCDOI 10.18926/fest/11463
Title Alternative Heat Budget on Rice Field
FullText URL 009_081_085.pdf
Author Yang, Dongmei| Iwata, Toru| Miura, Takeshi| Ohtaki, Eiji|
Abstract Experience of flux measurements over tall canopies has revealed that the eddy flux of sensible plus latent heat is about 30% smaller than the available radiant energy flux. A systematic observation was carried out to investigate the imbalance problem on rice field. The rice field represents a complex system consisting of rice plant, irrigated water and soil. Date obtained in this experiment show that appreciable understimations of sensible and latent heat fluxes are not recognized but understimations of 15 to 23% are counted in the soil heat flux.
Keywords Heat budget Eddy correlation method Sensible heat flux Latent heat flux Soil heat flux
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 81
End Page 85
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313468
Author Takahashi, Sin-Ei| Miura, Takeshi| Hatori, Osamu|
Published Date 2004-01
Publication Title Mathematical Journal of Okayama University
Volume volume46
Issue issue1
Content Type Journal Article
JaLCDOI 10.18926/fest/11572
Title Alternative Comparison of micrometeorological environments inside and outside a watermelon plastic greenhouse
FullText URL 003_121_126.pdf
Author Morita, Noboru| Miura, Takeshi|
Abstract The use of glass and plastic greenhouses have rapidly increased in recent years. Meteorological and soil moisture environments inside a greenhouse are significantly different from those in the open field. These differences should be understandable to establish accurate predictions of water consumption and evapotranspiraton inside a greenhouse which play impotrant roles in the design of any irrigation system. This study aims to estimate the micrometeorological conditions inside a watermelon plastic greenhouse which can be used for evapotranspiration calculations. Therefore, micrometeorological data were measured inside and outside the greenhouse for the comparison purposes. The results of this study may be summarized as : (1) Solar radiation inside the greenhouse was about 70% of that of outside it. (2) Net radiation during the daytime inside the greenhouse was almost the same as the absorbed total short-wave radiation. (3) The difference of air temperature inside and outside the greenhouse was very large during the daytime whereas not much difference was observed during the nighttime. (4) Both relative humidity and saturation deficit inside the greenhouse were higher than outside in case of highly vegetative land. (5) Wind speed inside the greenhouse was almost zero, while outside the average value was 1.8m/s.
Keywords plastic greenhouse micrometeorology watermelon
Publication Title 岡山大学環境理工学部研究報告
Published Date 1998-01-14
Volume volume3
Issue issue1
Start Page 121
End Page 126
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313884
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 日本語
File Version publisher
NAID 120002313813
Author Moroizumi, Toshitsugu| Kusuyama, Tomoyo| Miura, Takeshi|
Published Date 2009-12
Publication Title 環境制御
Volume volume31
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/fest/44792
Title Alternative Improvement of complementary relationship-based evapotranspiration model
FullText URL fest_016_035_039.pdf
Author Nakamichi, Takeshi| Moroizumi, Toshitsugu| Miura, Takeshi|
Abstract Advection-Aridity(AA) model can calculate actual evapotranspiration by using only meteorological data. However, comparing the model with Penman equation showed that AA model doesn’t properly evaluate evapotranspiration from urban moisture area. In urban area, Actual evaporation from water calculated by AA model(E) are much less than that by Penman equation(Epo). Multiple regression analysis using estimation results indicates that the difference between the models is due to the difference of the sensitivity to vapor pressure deficit between the models. To improve this problem, modification coefficient k, defined as k=a・albedo+b, is suggested. Regression coefficients a, b are determined as satisfying k=Epo/E for water and k=1 for urban surface. By using this coefficient k, evaporation from water is nearly equal to value estimated by Penman equation, while evaporation from urban surface is changeless.
Keywords Complementary relationship Actual evapotranspiration Potential evapotranspiration Water budget
Publication Title 岡山大学環境理工学部研究報告
Published Date 2011-03-18
Volume volume16
Issue issue1
Start Page 35
End Page 39
ISSN 2185-3347
language 日本語
File Version publisher
NAID 120002949472
Author 三浦 健志| 奥島 史朗|
Published Date 1984-01-31
Publication Title 岡山大学農学部農場報告
Volume volume6
Content Type Departmental Bulletin Paper
Author Yomota, Atsushi| Miura, Takeshi|
Published Date 1982
Publication Title 岡山大学農学部学術報告
Volume volume60
Issue issue1
Content Type Departmental Bulletin Paper
Author Nagahori, Kinzo| Miura, Takeshi| Amaya, Takao|
Published Date 1987
Publication Title 岡山大学農学部学術報告
Volume volume70
Issue issue1
Content Type Departmental Bulletin Paper