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ARIMA 모델을 이용한 수막재배지역 지하수위 시계열 분석 및 미래추세 예측
백미경,김상민 한국농공학회 2023 한국농공학회논문집 Vol.65 No.2
This study analyzed the impact of greenhouse cultivation area and groundwater level changes due to the water curtain cultivation in the greenhousecomplexes. The groundwater observation data in the Miryang study area were used and classified into greenhouse and field cultivation areas to comparethe groundwater impact of water curtain cultivation in the greenhouse complex. We identified the characteristics of the groundwater time series databy the terrain of the study area and selected the optimal model through time series analysis. We analyzed the time series data for each terrain’s tworepresentative groundwater observation wells. The Seasonal ARIMA model was chosen as the optimal model for riverside well, and for plain andmountain well, the ARIMA model and Seasonal ARIMA model were selected as the optimal model. A suitable prediction model is not limited to onemodel due to a change in a groundwater level fluctuation pattern caused by a surrounding environment change but may change over time. Therefore,it is necessary to periodically check and revise the optimal model rather than continuously applying one selected ARIMA model. Groundwaterforecasting results through time series analysis can be used for sustainable groundwater resource management.
수막용수 사용으로 인한 시설재배지역의 지하수 수온과전기전도도 변화 특성 분석
백미경,김상민 한국농공학회 2023 한국농공학회논문집 Vol.65 No.6
This study aimed to analyze the impact of water curtain cultivation in the greenhouse complexes on groundwater’s electric conductivity and watertemperature. The greenhouse complexes are mainly situated along rivers to secure water resources for water curtain cultivation. We classified thegroundwater monitoring well into the greenhouse (riverside) and field cultivation areas (plain) to compare the groundwater impact of water curtaincultivation in the greenhouse complex. The groundwater observation network in Miryang, Gyeongsangnam-do, located downstream of the NakdongRiver, was selected for the study area. As a result of analyzing the electric conductivity and water temperature, the following differences were foundin the observed characteristics by region. 1) The electric conductivity and water temperature of the riverside area, where the permeability is high andclose to rivers, showed a constant pattern of annual changes due to the influence of river flow and precipitation. 2) The flat land in general agriculturalareas showed general characteristics of bedrock observation in the case of water temperature. Still, it seemed more affected by the surrounding well'swater use and water quality. The electric conductivity did not show any particular trend and was influenced by the surrounding environment accordingto the location of each point.
중국인 한국어 고급 학습자의 공손성 인식 연구 -종결 기능 연결 어미 ‘-아서, -니까, -는데, -거든’을 중심으로-
백미경,황훼이민,강민지 국제한국어교육학회 2022 한국어 교육 Vol.33 No.4
The purpose of this study is to examine the perception of politeness of advanced-level Chinese students who are studying Korean; with a particular focus on ‘-aseo, -nikka, -neunde, -geodeun’, which is the connective endings functioning as final endings used in similar discourse situations. The study conducted a survey of 30 Chinese Korean learners of advanced level, and the same survey was conducted with 30 Korean native speakers to compare the level of perception. The questionnaire set the variables with high social status, distant intimacy between the speakers and listeners, and age differences to compare the level of politeness of the connective endings functioning as final endings. The comparison group was also set as a variable so that these variables could be compared more objectively. The survey shows that Chinese advanced Korean learners recognized ‘-aseo’ as the most polite expression and ‘-geodeun’ as the least polite expression in most situations. The results of this study suggest that it can be a starting point for finding ways to teach pragmatic parts in the utterances of not only Chinese Korean learners but also foreign learners who want to learn Korean.
지하수관측망을 이용한 강변 시설재배지역 지하수위 변화 특성 분석
백미경,김상민 한국농공학회 2022 한국농공학회논문집 Vol.64 No.6
The purpose of this study was to analyze the impact of greenhouse cultivation area and groundwater level changes due to the water curtain cultivationin the greenhouse complexes, which are mainly situated along rivers where water resources are easy to secure. The groundwater observation networkin Miryang, Gyeongsangnam-do, located downstream of the Nakdong River, was selected for the study area. We classified the groundwater monitoringwell into the greenhouse (riverside) and field cultivation areas (plain and mountain) to compare the groundwater impact of water curtain cultivation inthe greenhouse complex. The characteristics of groundwater level changes classified by terrain type were analyzed using the observed data. Riversidewells have significant permeability coefficients and are close to rivers, so they are greatly affected by river flow and precipitation changes so that waterlevel shows a specific pattern of annual changes. Most plain wells do not show a constant annual change, but observation wells near small rivers andsmall-scale greenhouse cultivation areas sometimes show annual and daily changes in which the water level drops during winter. Compared to otherobservation wells, mountain wells do not show significant yearly changes in water level and show general characteristics of bedrock aquifer well witha low permeability coefficient.