| 摘要: |
| 本文以20m2蒸发池为标准,选定咍地坡站和阿克苏站1982-1988年的部分同期观测资料,研究其它蒸发器的代表性。采用灰色关联法计算各种蒸发器与20m2蒸发器的关联度。结果表明:咍地坡站,ф20cm的关联度最高,其次为ITII-3000;阿克苏站,ITII-3000型关联度最高,其次为E-601。该结果与20m2蒸发量与各型号的线性相关分析结果不同。哈地坡站线性相关系数以ITII-3000最大,其次足E-601;阿克苏站以E-601最大,ITII-3000次之。 |
| 关键词: 灰色关联法 灰色关联度 相关系数 干旱地区 蒸发 蒸发器 |
| DOI：10.18307/1994.0202 |
| 分类号: |
| 基金项目: |
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| Approach to the representativeness of evapori-meters in arid area by grey incidence method |
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Tang Qicheng
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Institute of Geography, Chinese Academy of Sciences, Beijing 100101
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| Abstract: |
| The representativeness of evaporimeters in enid area has been questioned by using Grey Incidence Method in this paper.The analysis was carried out with the periodic (Apr.-Oct., 1984-1986) observing data of evaporation capacities by different evaporimeters in arid areas as Hadipo Station and Aksu Station, which lie in the northern and southern slopes of the Tianshan Mountains in Xinjiang separately.The evaporimeters include different types such as ф20 cm,E-601,ГГП-3000,20 m2 and A class.The monthly evaporation capacity of 20 m2 evaporipool has been considered as standard evaporation .It is assumed that the relations between evaporation capacities by using 20 m2 evaporipool and other evaporimeters such as ГГП-3000,E-601,ф20-3 cm,ф20-2 cm,A class are r1,r2,r3,r4,r5 respectively.The orders of grey incidence degree are r4 >r1 >r3 > r2 in Hadipo Station and r1 >r2 >r3 > r5 in Aksu Station.In the meantime,the linear correlation analysis shows that correlation coefficients are in the order of Hadipo Station and r2 >r1 >r5 >r3 in Aksu Station.Obviously,the order of incidence degree differs from that of correlation coefficient.The preliminary analysis gives the following reasons for the difference: (1) the grey incidence degree focuses on the consistency of procedure while the correlation coefficient on the correlating degree between two series;(2) that two series are almost stable and normally distributed is the prerequisite for the caclulation of correlation coefficient, while the caclulation degree has nothing to do with series Stability and distribution.The above analysis advances a question on the ever-established conclusion that the monthly evaporation of evaporimeter E-601 represents that of large evaporipool in arid area.What type of evaporimeters can represent the evaporation of physical water body still awaits further discussion. |
| Key words: Grey Incidence Method grey incidence degree correlation coefficient arid area evaporation evaporimeter |
