CAJ | 학술논문

潜水蒸发受气象、土壤、地下水埋深以及土地利用（作物种类）多种因素的影响，计算区域潜水蒸发量时应考虑这些因素具有空间变异性。考虑灌区土地利用、土壤类型和地下水埋深等因素对潜水蒸发量影响，提出一种基于GIS的区域潜水蒸发计算方法（GREGEC），并在ArcGIS10.0中利用其内置的VBA环境完成Arcobjects编程计算。在河南省柳园口灌区的应用表明， GREGEC计算的多年平均潜水蒸发量与水量平衡法的计算结果误差为2%；与灌区地下水模型所得结果的空间分布比较一致，但逐月潜水蒸发量变化规律更合理。GREGEC方法能有效提高区域潜水蒸发量计算精度，且方便编程实现，将传统点尺度的潜水蒸发量计算提升到灌区尺度。
잠수증발수기상、토양、지하수매심이급토지이용（작물충류）다충인소적영향，계산구역잠수증발량시응고필저사인소구유공간변이성。고필관구토지이용、토양류형화지하수매심등인소대잠수증발량영향，제출일충기우GIS적구역잠수증발계산방법（GREGEC），병재ArcGIS10.0중이용기내치적VBA배경완성Arcobjects편정계산。재하남성류완구관구적응용표명， GREGEC계산적다년평균잠수증발량여수량평형법적계산결과오차위2%；여관구지하수모형소득결과적공간분포비교일치，단축월잠수증발량변화규률경합리。GREGEC방법능유효제고구역잠수증발량계산정도，차방편편정실현，장전통점척도적잠수증발량계산제승도관구척도。
Groundwater evapotranspiration is affected by metrological conditions, soil type, groundwater depth and land use (crop variety), and the spatial variability of all these factors should be taken into con-sideration. A GIS-based regional groundwater evapotranspiration calculation (GREGEC) method was pro-posed and implemented by programming ArcObjects with VBA in the environment of ArcGIS 10.0. The method was applied to calculate regional groundwater evapotranspiration in Liuyuankou Irrigation System and the outputs were compared with the methods of water balance and groundwater modeling. The results show that compared with the water balance method, the error in annual groundwater evapotranspiration is about 2%;the spatial distribution patterns of groundwater evapotranspiration from the GREGEC and the groundwa-ter modeling method are similar, while the monthly groundwater evapotranspiration from GREGEC is more reasonable. The GREGEC method can improve the estimation accuracy and it was convenient to be imple-mented by programming, which is helpful for upscaling groundwater evaporation from the traditional point scale to the regional scale.