표준강수지수(SPI)를 이용한 가뭄에 대한 지표수와 지하수 반응 비교 (Comparison of Surface Water and Groundwater Responses to Drought using the Standardized Precipitation Index (SPI))

서지정보

· 발행기관 : 한국지하수토양환경학회
· 수록지 정보 : 지하수토양환경 / 27권 / 5호 / 1 ~ 9페이지
· 저자명 : 구민호, 김원겸, 송성호

초록

A correlation analysis was performed to investigate differences in the response of surface water and groundwater todrought using the Standardized Precipitation Index (SPI). Water level data of 20 agricultural reservoirs, 4 dams, 2 rivers,and 8 groundwater observation wells were used for the analysis. SPI was calculated using precipitation data measured at anearby meteorological station. The water storage of reservoirs and dams decreased significantly as they respondedsensitively to the drought from 2014 to 2016, showing high correlation with SPI of the relatively long accumulation period(AP). The responses of rivers varied greatly depending on the presence of an upstream dam. The water level in riversconnected to an upstream dam was predominantly influenced by the dam discharge, resulting in very weak correlationwith SPI. On the contrary, the rivers without dam exhibited a sharp water level rise in response to precipitation, showinghigher correlation with SPI of a short-term AP. Unlike dams and reservoirs, the responses of groundwater levels toprecipitation were very short-lived, and they did not show high correlation with SPI during the long-term drought. Indrought years, the rise of groundwater level in the rainy season was small, and the lowered water level in the dry seasondid not proceed any further and was maintained at almost the same as that of other normal years. Conclusively, it isconfirmed that groundwater is likely to persist longer than surface water even in the long-term drought years.

영어초록

A correlation analysis was performed to investigate differences in the response of surface water and groundwater todrought using the Standardized Precipitation Index (SPI). Water level data of 20 agricultural reservoirs, 4 dams, 2 rivers,and 8 groundwater observation wells were used for the analysis. SPI was calculated using precipitation data measured at anearby meteorological station. The water storage of reservoirs and dams decreased significantly as they respondedsensitively to the drought from 2014 to 2016, showing high correlation with SPI of the relatively long accumulation period(AP). The responses of rivers varied greatly depending on the presence of an upstream dam. The water level in riversconnected to an upstream dam was predominantly influenced by the dam discharge, resulting in very weak correlationwith SPI. On the contrary, the rivers without dam exhibited a sharp water level rise in response to precipitation, showinghigher correlation with SPI of a short-term AP. Unlike dams and reservoirs, the responses of groundwater levels toprecipitation were very short-lived, and they did not show high correlation with SPI during the long-term drought. Indrought years, the rise of groundwater level in the rainy season was small, and the lowered water level in the dry seasondid not proceed any further and was maintained at almost the same as that of other normal years. Conclusively, it isconfirmed that groundwater is likely to persist longer than surface water even in the long-term drought years.

참고자료

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