한국농림기상학회지, 제 4권 제4호(2002) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 4, No. 4, (2002), pp. 197~202
ⓒ Author(s) 2014. CC Attribution 3.0 License.


대형증발계 증발량의 일 변화

대구가톨릭대학교 환경과학과

(2002년 08월 13일 접수; 2002년 10월 02일 수락)

Short-term Variation in Class A Pan Evaporation

Department of Environmental Science, Catholic University of Daegu, Kyeongbuk 712-702, Korea

(Received August 13, 2002; Accepted October 02, 2002)

ABSTRACT
A new method is used to estimate the amount of water evaporation from Class A Pan with higher precision and accuracy. The principle of method is to detect the weight change of a buoyant sinker resulting from a change in water level of Class A Pan. A strain-gauge load cell is used to measure the weight change. Field observation of evaporation was done at Pohang Meteorological Station from June 24 to August 4, 2002. By using this new method, it is possible to measure hourly evaporation accurately even under a strong solar radiation and wind disturbance, enabling a direct comparison of evaporation with other meteorological elements. At night, under low humidity and high wind speed conditions, more evaporation was recorded than during daytime. Maximum evaporation rates observed during this period exceed 1.0 mm/hour under the sunny and windy conditions with low humidity. To understand relationships between meteorological elements and latent heat flux at ground level, we suggest intensive held experiments using high accuracy evaporation recording instruments with hourly time interval.

Keyword: environmental instrumentation, evaporation, buoyance force, water resource, water level, Class A Pan

MAIN

REFERENCES

이부용, 박병윤, 1997:증발량 자동관측 방법에 관한 연구, 대구효성가톨릭대 응용과학연구소 논문집, 6(1), 151-154.

이부용, 1998: 증발 기록계 개발에 관한 연구. 대구효성가톨릭대학교 연구논문집, 57, 239-243.

이부용, 2001: 대형증발계용 매시간 증발 기록계 개발에 관현 연구, 한국환경과학회지, 10(5), 323-327.

Assouline, S. and Y. Mahrer, 1996: Spatial and temporal variability in microclimate and evaporation over lake Kinneret : Experimental evaluation. Journal of Applied Meteorology, 35, 1076-1084.

Bolsenga, S. J., 1975: Estimating energy budget components to determine lake Huron evaporation. Water Resources Research, 11, 661-666.

McGinn, S. M. and D. J. McLean, 1995: Monitoring freewater evaporation at automated weather stations. Journal of Atmospheric and Oceanic Technology, 12(6), 1363-1366.