泥岩坡面日射量之推估

Estimation of Solar Radiation on the Mudstone Slopes

徐森雄(Sen-Hsiung Hsu) ； 黃光賢(Kuang-Hsien Huang) ； 廖士吟(Shin-Yin Liao)

《作物、環境與生物資訊》 2卷3期 (2005/09) Pp. 211-220

https://doi.org/10.30061/CEB.200509.0004

摘要

本研究旨在探討泥岩不同坡向、坡度间，因太陽日射量吸收上的不同，造成坡面溫度變化。經選擇－環狀皆為青灰泥岩的天然地形，利用日射計觀測其坡面所受之日射量；觀測時問則選定春分、夏至、秋分及冬至等四節氣，並配合太陽入射角與方位角之分析。所得之結果摘列如下：(1)太陽入射角度與各坡向之垂直日射量有正相關係，能藉此推估泥岩各坡面溫度變化趨勢。(2)東、西兩向坡於夏至時，坡面一天內所吸收的直射日射量理論約為南向坡的1.31~1.48倍，春秋分時約為0.81~0.92倍，至冬至時降至0.53~0.60倍，平均日照時數均小於南向坡，逐時的日射強度大於南向坡。

關鍵字

泥岩 ； 太陽輻射 ； 地表溫度 ； 坡向

並列摘要

The purpose of this study was to investigate the differences in slope direction (aspect) and angle for the absorption of solar radiation and thus surface temperature changes of mudstone. A nature ring-like mudstone was selected to observe the receiving solar radiation onto the different slopes of the mudstone using a pyrarometer. The observation time was chosen based on the four solar terms, including the vernal equinox, the summer solstice, the autumnal, equinox, and the winter solstice in accordance with the solar incident angles and the solar azimuth. The results obtained was summarized as follows. The results indicated that there existed a positive correlations between the solar incident angles and the amount of the direct radiation on the different slopes. The technique used in this study was proved to be able to estimate the tendency of the temperature changes on the various slopes of the mudstone and to reveal the results of rain erosion and plant growth tendency. In comparisons of the amounts of the direct solar radiation absorbed between the eastward and westward slopes and the southward slope in a day, results indicated that radiation absorbed in the east and west slopes was 1.31 to 1.48 folds higher than that of the south slope at the summer solstice, was 0.81 to 0.92 folds at both the vernal and the autumnal equinox, and was 0.53 to 0.60 folds at the winter solstice. The average sunshine hours received in the east and west slope were smaller than that of the south slope, but the strength of the hourly radiation was greater than that of the south slope.

並列關鍵字

Mudstone ； Solar radiation ； Surface temperature ； Slope aspect