| JaLCDOI | 10.18926/fest/44792 |
|---|---|
| タイトル（別表記） | Improvement of complementary relationship-based evapotranspiration model |
| フルテキストURL | fest_016_035_039.pdf |
| 著者 | 中道 丈史| 諸泉 利嗣| 三浦 健志| |
| 抄録 | 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. |
| キーワード | Complementary relationship Actual evapotranspiration Potential evapotranspiration Water budget |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2011-03-18 |
| 巻 | 16巻 |
| 号 | 1号 |
| 開始ページ | 35 |
| 終了ページ | 39 |
| ISSN | 2185-3347 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002949472 |
| JaLCDOI | 10.18926/fest/53219 |
|---|---|
| タイトル（別表記） | Building of minimum air temperature forecast system using the Internet -Design of the forecast website- |
| フルテキストURL | fest_020_035_040.pdf |
| 著者 | 三島 拓也| 三浦 健志| 諸泉 利嗣| |
| 抄録 | The purpose of this study is to build a forecast system for predicting at minimum air temperature in the next morning from the meteorological data, such as air temperature, humidity, and the amount of solar radiation, in a field in the evening on the previous day. The meteorological data are sent to a relay server, and then, transferred to a PC in our laboratory of Okayama University by executing the computer program to import the data which are used to calculate the predicted values of minimum air temperature. The predicted minimum air temperatures are released for the farmers on the website in the server of Okayama University. The website is also created by our laboratory. As a result, the predicted minimum air temperatures agreed with the measured ones. |
| キーワード | Minimum air temperature prediction internet frozen disaster |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2015-03 |
| 巻 | 20巻 |
| 号 | 1号 |
| 開始ページ | 35 |
| 終了ページ | 40 |
| ISSN | 2187-6940 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120005572534 |
| JaLCDOI | 10.18926/fest/54862 |
|---|---|
| タイトル（別表記） | Method for predicting minimum air temperature in the next morning using local meteorological observation data - Improvement on minimum air temperature forecasting system utilizing the Internet - |
| フルテキストURL | fest_022_055_059.pdf |
| 著者 | 上田 悠生| 三島 拓也| 三浦 健志| 諸泉 利嗣| |
| 抄録 | We have developed a minimum air temperature forecasting system using local meteorological observation data in order to prevent or mitigate the frost damage. In this paper, the correlation between the meteorological factors and the decrease in air temperature during the night was shown. Then minimum air temperature was predicted by the multiple regression equation that uses air temperature and humidity at 18:00 as explanatory variables. As the result, the root mean square error (RMSE) was 2.8°C. When the difference of air temperature between 17:00 and 18:00 was used for the prediction instead of humidity, the RMSE was 3.5°C. Next, the prediction was carried out only in clear nights, then the equation that use air temperature and humidity at 18:00 showed that the RMSE was 1.3°C. Although the predictive accuracy of the equations for clear nights is low on cloudy or rainy nights, we can forecast safely on frosty nights by using those equations in combination with the equations for all nights. |
| キーワード | Minimum air temperature prediction frost damage IT multiple regression analysis |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2017-03 |
| 巻 | 22巻 |
| 号 | 1号 |
| 開始ページ | 55 |
| 終了ページ | 59 |
| ISSN | 2187-6940 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120005997443 |
| JaLCDOI | 10.18926/fest/54863 |
|---|---|
| タイトル（別表記） | Evaluation of drop in official air temperature record at Okayama caused by relocation of observation field of Okayama Local Meteorological Observatory - By comparison with records observed at surrounding points - |
| フルテキストURL | fest_022_061_064.pdf |
| 著者 | 三浦 健志| 上田 悠生| 守田 秀則| 近森 秀高| 黒川 正宏| 中嶋 佳貴| 沖 陽子| |
| 抄録 | Statistical change in official temperature records at Okayama City caused by relocation of meteorological observation field of Meteorological Agency was evaluated. The observation field of Okayama local meteorological observatory was moved to the Tsushima Campus of Okayama University from the downtown area of Okayama City in March, 2015. Comparison between the air temperature records measured at meteorological agency station and the records at Tanjo Pond in Tsushima Campus, showed 0.56 ℃ drop in annual average before and after relocation. Moreover, comparison between the records of Okayama local meteorological observatory and that at the surrounding meteorological observing 9 stations showed 0.55 ℃ drop in annual average. Those results suggest that the relocation dropped annual average of air temperature by about 0.6 ℃. |
| キーワード | Okayama Local Meteorological Observatory relocation drop in air temperature |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2017-03 |
| 巻 | 22巻 |
| 号 | 1号 |
| 開始ページ | 61 |
| 終了ページ | 64 |
| ISSN | 2187-6940 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120005997444 |
| タイトル（別表記） | Estimation of actual evapotranspiration in 3 river basins in Okayama prefecture - Comparison of Morton method and modified Brutsaert & Stricker method - |
|---|---|
| フルテキストURL | fest_026_001_005.pdf |
| 著者 | 諸泉 利嗣| 三浦 健志| |
| 抄録 | In the study, the actual evaporation was estimated in the Asahi River, the Takahashi River, and the Yoshii River basins in Okayama prefecture for four years from January 1999 to December 2002. The Morton method and the modified Brutsaert and Stricker (B & S) method were applied to the three river basins to estimate the actual evapotranspiration and compare the two methods. As a result, the actual evapotranspiration by the Morton method was all almost equal to that by the Penman’s potential evapotranspiration, and the evapotranspiration was overestimated rather than the actual evapotranspiration. The actual evapotranspiration by the modified B & S method was below the Penman’s potential evapotranspiration throughout the year, and the total annual amount was about 80% of the potential evapotranspiration. In addition, the modified B & S method showed the general tendency that the actual evapotranspiration was lower in urban area than in the hilly and mountainous areas. |
| キーワード | Complementary relationship Actual evapotranspiration Potential evapotranspiration |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2021-03 |
| 巻 | 26巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 5 |
| ISSN | 13419099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| タイトル（別表記） | Mitigation Effect of Thermal Environment on the Asphalt by Sprayed Water |
|---|---|
| フルテキストURL | fest_026_007_010.pdf |
| 著者 | 諸泉 利嗣| 伊藤 尚也| 三浦 健志| |
| 抄録 | In this study, water was sprinkled on the asphalt surface during the hottest hours of the day using a sprinkler, and the effect was experimentally verified. An air temperature, a humidity, a ground surface temperature, and a globe temperature which is radiant heat from the ground were measured, and using these measurements, WBGT (Wet-Bulb Globe Temperature), which is an index of thermal stress on the human body, was calculated. In this way, we investigated not only the climate mitigation effect but also the mitigation effect of the thermal environment felt by the human body. As a result, the following points were clarified in this study: 1) During sprinkling, the air temperature, the black globe temperature, and the WBGT were lower in the sprinkled area than in the controlled area, and the wet-bulb temperature hardly changed. 2) Focusing on the amount of change after watering compared to before watering, the air temperature, the globe temperature, and the WBGT decreased, and the wet-bulb temperature hardly changed. 3) In the sprinkled area, when the WBGT value just before watering is higher than that of the strict caution (WBGT is 28°C or higher), it drops to a level one rank lower, and when the WBGT value just before watering is warning (WBGT value is 25°C or higher), it was almost no change. |
| キーワード | WBGT Air temperature Globe Temperature Thermal environment Sprayed water |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2021-03 |
| 巻 | 26巻 |
| 号 | 1号 |
| 開始ページ | 7 |
| 終了ページ | 10 |
| ISSN | 13419099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |