本研究採用都卜勒雷達雨量計(R)及傾斗式自記雨量儀(T)於國立屏東科技大學教學氣象站2020年8月至2021年8月蒐集34筆有效數據,以R提前T測得降雨量之時間差,配合對流雨、地形雨及鋒面雨等不同降雨型態來探討都卜勒雷達雨量計於近地表觀測降雨量之適用性。經整理分析獲致以下結果:R觀測降雨量(RP)有偏低於T觀測降雨量(TP),其關係式:RP = 0.36TP + 1.1,相關係數為0.94;當對流雨、地形雨及鋒面雨下之降雨強度分別小於11.1 mm / hr、1.4 mm / hr及2.4 mm / hr時,RP與TP相近;以R會較T提前觀測降雨來估測近地表氣層內之絕對溼度達23 g/m3,此值可視為即將降雨之判斷依據。
The study used tow distinct rain gauges include Doppler radar (R) and tipping bucket (T) to estimate antecedent precipitation above ground surface. All the 34 valid data were collected from August 2020 to August 2021. The plot was located at the educational meteorology station of National Pingtung University of Science and Technology. The R and T could observe precipitation Rp and Tp respectively, and within time difference. The results had summarized as: The Rp and Tp correlation equation was RP = 0.36 TP + 1.1 with reference coefficient in 0.94. Rp could follow Tp under precipitation intensity was less than 11.1, 1.4 and 2.4 mm/hr within precipitation of convective, topographic and frontal, respectively. To apply R could measure antecedent precipitation than T, and then absolute humidity of air layer above ground surface was close to 23 g/m3 would appear precipitation.