감시권역 분석을 통해본 경기북부지역 보루의 사용주체와 기능

Abstract

It is the dominant view that the forts in northern Gyeonggi-do were built by Koguryeo to seize the traffic route which connects the northern and southern regions of Koguryeo. However, aside from the forts in northern Gyeonggi-do that have been identified as Koguryeo’s by Koguryeo’s artifacts, there exist numerous forts of which the user has not been identified. Therefore, in respect to the analysis of the defense system, a more detailed analysis method is required rather than the simple inference based on the assumption that all forts in northern Gyeonggi-do were Koguryeo’s. This paper analyzes the visibility zone of each fort located on Acha Mountain and its neighborhood using ArcGIS program, through which it sets the surveillance range of the fort. Further, the paper investigates the primary surveillance zones observed by the adjacent forts and classifies them into several districts, which are part of the major traffic route that runs north and south of northern Gyeonggi-do. In respect to the forts located in Yangju basin, Koguryeo forts and the forts which are not definitely identified as Koguryeo’s all have the same surveillance zone. This falls into the traffic route considered significant by both Shilla and Koguryeo, indicating that Shilla also chose the military base control system as Koguryeo did. Notwithstanding, the Cheonbo Mountion forts 3, 4, and 5 overlooking Pochen, unlike other Koguryeo forts, aim primarily to surveil around the Pochen region. This suggests that Cheonbo Mountion forts 3, 4, and 5 were used more by Shilla than Koguryeo, and they were built to watch the Mohe-Ruzhens (靺鞨) moving southward from the north-east rather than the traffic route that runs from the Han River along the Wangsuk Stream to Pocheon. In addition, the forts located on Acha Mountain, Mangu Mountain, and Shirubong Mountain primarily aim to watch the plain south of the Wangsuk Stream. However, the forts overlooking other traffic routes that run to the north along the Wangsuk Stream are no longer found, and the traffic routes from the Pocheon region are not directed to the Wangsuk Stream but to the Jungrang Stream. Hence, it is presumable that the forts in the Acha Mountain region overlooking the east primarily aim to watch the Mongchon Mud Wall Fortress region and the upper region of the Han River, rather than the traffic routes using the Wangsuk Stream. This is believed to be the means to watch Shilla advancing to the Han River basin through the Namhan River.