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 ที่มา:Engineering Economistหัวเรื่อง:Dyal kriging : An Exploratory use in Economic Metamodeling. |
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ผลงานตีพิมพ์ในวารสารวิชาการPerformance optimizing and entropy generation analysis of a platinum–stainless-steel segmented microreactorผู้แต่ง: Li, Y.-H., Kao, H.-H., Wang, Y.-R., Wan, J.,  Dr.Kanit Manatura, Associate Professor , วารสาร: 
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 หัวเรื่อง:การกระจายของปริมาณเกลือในชุดดินกำแพงแสน ผู้เขียน:ดร.สุนทรี ยิ่งชัชวาลย์, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractMost soil properties show spatial relationships. This is useful for interpolation. Employing the geostatistical technique, analysis of semi-vriograms will establish the spatial relationships, while ordinary kriging ia the algorithm for interpolation. The area of study was a rectangular plot of 120 ha around a reservoir in the experimental field of Kasetsart University at Kamphaeng Saen. The soil was Kamphaeng Saen. The soil was Kamphaeng Saen soil series (Typic Haplustalfs). Sampling pints were the intersection of 100x100 m2 grid for a total of 127 points. Soil sampling included the top layer of 0-5 cm and the lower layer of 25-30 cm at two periods: during April and November of 1989. Soil properties under study were electrical conductivity of soil saturation extract (ECe), practical sodium adsorption ratio (SARp) and pH soil:water solution of 1:1 Semi-variograms of the three properties were spherical functions, with sills about equal the ordinary variance. The ranges were around 300 m for ECe and SARp, and 500 m for pH. Interpolation was by punctual kriging at the 10x10 m2 scale, giving a total of 12,831 points. Estimated and actual data were displayed in maps of isopleth. The results showed that there were only 3 locations that ECe was higher than 4 dS/m, indication saline soil condition. These were the southern rim of the reservoir, middle and the top right-hand corner of the plot. Since most of the soluble salts were predominantly calcium and magnesium, sodium hazard was limited in only two locations. The areas in the southern rim of the reservoir and in the top right-hand corner contained few patches with SaRp > 13 mol0.5/m1.5, indicating a saline-sodic soil. The pH of the area was mainly in the range of 6 – 8. With kriging, the distribution patterns of salt can be demonstrated with much more details. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Spatial and Temporal Distribution of Irrigation Requirements in the Chao Phraya River Basin, Thailand) ผู้เขียน:นางสาวปรียาพร โกษา, อาจารย์ , ดร.กอบเกียรติ ผ่องพุฒิ, รองศาสตราจารย์ , ดร.ศุภกิจ นนทนานันท์, รองศาสตราจารย์ , Pakdee Khobklag สื่อสิ่งพิมพ์:pdf AbstractThe tendency towards increasingly-higher water demands than in the past has increased the importance of improving water resource management. Responsible water resource management is facilitated by quantifying the irrigation requirements for given land uses. The goal of this study was to determine the spatial distribution of the irrigation requirements in the eight sub-basins of the Chao Phraya River basin, Thailand. To achieve this goal, actual evapotranspiration was determined by the SEBAL and the FAO Penman-Monteith equations while precipitation was recorded from TRMM satellite images and rain gauge stations. The irrigation requirement was calculated by subtracting the amount of actual evapotranspiration from the measured precipitation. The results of the study concluded that the Ping, Wang and Yom sub-basins had sufficient precipitation for all land uses. For the Nan, Sakae Krang and Pasak sub-basins, there was sufficient precipitation for all land uses except in areas that had existing irrigation infrastructure and thus there is a need for water that is not naturally supplied to support some land uses. For the Tha Chin and Chao Phraya sub-basins there was insufficient precipitation for all land uses. Additional water for these two sub-basins could be sourced from the surplus water from the Ping, Wang, Yom and Nan sub-basins that flowed into the Chao Phraya sub-basin and could also be diverted to the Tha Chin sub-basin. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Estimation of Spatial and Temporal Reference Evapotranspiration in the Chao Phraya River Basin) ผู้เขียน:นางสาวปรียาพร โกษา, อาจารย์, ดร.กอบเกียรติ ผ่องพุฒิ, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractIn the hydrological cycle and water use, evapotranspiration is one of the most important components because it represents a loss of usable water from the hydrologic supply. The purposes of this research are to calculate spatial and temporal reference evapotranspiration using FAO Penman- Monteith and Kriging methods and to determine the relationship between mean monthly temperature and monthly reference evapotranspiration. To achieve the first purpose, daily reference evapotranspiration from 1971 to 2002 was computed for each weather station using the FAO Penman-Monteith method. The average of monthly reference evapotranspiration in each weather station was figured. Thereafter, monthly reference evapotranspiration, that is point reference evapotranspiration, was interpolated using the Kriging interpolation. The result of this calculation is spatial reference evapotranspiration or reference evapotranspiration map from January to December (temporal). After spatial and temporal reference evapotranspiration was calculated, the relationship between mean monthly temperature and mean monthly reference evapotranspiration was figured. The result shows that linear regression and polynomial analysis can be used to explain this relationship. |
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