The increasing frequency of droughts has been increasing the necessity of utilizing subsurface dams as reliable groundwater resources in areas where it is difficult to supply adequate agricultural water using only surface water. In this study, we analyzed the current status and actual conditions of five agricultural subsurface dams as well as the effect of obtaining additional groundwater from subsurface dams operated as one aspect of the sustainable integrated water management system. Based on the construction methods and functions of each subsurface dam, the five subsurface dams are classified into three types such as those that derive water from rivers, those that prevent seawater intrusion, and those that link to a main irrigation canal. The classification is based on various conditions including topography, reservoir location, irrigation facilities, and river and alluvial deposit distributions. Agricultural groundwater upstream of subsurface dams is obtained from four to five radial collector wells. From the study, the total amount of groundwater recovered from the subsurface dam is turned out to be about 29~44% of the total irrigation water demand, which is higher than that of general agricultural groundwater of about 4.6%.
국내의 경우에는 농업용 지하댐 건설이 활발히 이루어
Yeongdong, Gangwon-do, is located in the east of the Taebaek Mountains, hindering the stable management of water resources and suffering from limited water supply due to the continuous shortage of water resources. To solve the damage to residents due to the lack of water, the development and use of groundwater linked to surface water were found to be the most reasonable alternative. Moreover, as conflicts continue to occur due to environmental and social factors, it is necessary to select an alternative considering this. In this study, the humanities and social characteristics of the East Coast region were analyzed, and the areas and priorities required for the underground dam were presented. As a result of the analysis, the priority was high in the order of sockcho-si (ssangcheon) and gooseong-gun (buckcheon). The results of this study can be used as basic data when installing a new underground dam in the east coast area. Additionally, they can serve as a rational methodology for selecting priorities when expanding the water supply infrastructure in other regions with social conflicts.
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