Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Estimation of small pan evaporation using temperature data

기온자료를 이용한 소형증발접시 증발량 산정

  • 임창수 (경기대학교 공과대학 토목공학과)
  • Received : 2016.09.06
  • Accepted : 2016.12.07
  • Published : 2017.01.31
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Abstract

Pan evaporation has been used as an indirect method for the estimation of reservoir evaporation. Therefore, in this study, pan evaporation estimation equations using only temperature data were suggested in the case that available meteorological data is limited. A formula for estimating the pan evaporation were suggested by comparing estimated pan evaporation with measured pan evaporation in 12 study areas in Korea. The suggested pan evaporation equations were verified in 44 study areas by comparing not only with temperature-based equations but also with equations using other meteorological data (temperature, wind speed, relative humidity, and sunshine duration). The study results indicate that the suggested equations in this study provide much better pan evaporation estimates, compared with other temperature-based equations. Overall, the suggested equations provide appropriate pan evaporation estimates in most of 56 study areas. Therefore, the suggested equations using only temperature data in this study are considered appropriate for the estimation of pan evaporation in Korea especially in the case that available meteorological data is limited. In the future, using the air temperature and pan evaporation data measured at the reservoir, further research is needed to examine the applicability of suggested equations for the estimation of reservoir evaporation.

증발접시 증발량의 경우 저수지 증발량을 산정하는 간접적인 방법으로 유용하게 적용되고 있다. 따라서 본 연구에서는 이용할 수 있는 기상자료가 제한적인 경우에 기온자료만을 이용하여 증발접시 증발량을 산정하는 식을 제안하였다. 이를 위해서 전국 12개 지역에서 관측된 증발접시 증발량과 비교를 통해 제안식을 유도하였다. 또한 전국 44개 지역에 대해서 본 연구에서 제안된 증발접시 증발량 산정식을 다른 기온자료에 기초한 식들뿐만 아니라, 여러 종류의 기상자료(기온, 풍속, 습도, 일조시간)를 필요로 하는 식들과 비교하여 적용성을 파악하였다. 연구결과에 의하면 본 연구에서 제안된 증발량 산정식들은 다른 기온자료에 기초한 식들과 비교하여 전반적으로 양호한 증발접시 증발량 산정결과를 보였다. 본 연구에서 제안된 증발량 산정식의 경우 우리나라 56개 연구지역 대부분에서 전반적으로 양호한 증발접시 증발량 산정결과를 보였다. 따라서 본 연구에서 수정 제안된 기온자료만을 이용한 증발접시 증발량 산정식들은 우리나라에서 이용할 수 있는 기상자료가 제한적인 경우에 특히 적용성이 있는 것으로 판단된다. 추후에는 저수지에서 관측된 기온 및 증발접시 증발량 자료를 바탕으로 저수지 증발량 산정을 위한 제안식들의 적용성 검토연구가 필요하다.

Keywords

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