• 한국지형학회지
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• 제24권4호
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• pp.27-41
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• 2017

In this study, geomorphological and geological research has been carried out to estimate the possibility of ancient port location near Hwaseong Dangseong. Geomorphological characteristics around Eunsupo were analyzed through comparison of past and present topographic maps and field survey. Grain size, age dating, and geochemical analysis on surface sediments and borehole sediments were performed. Through the geomorphological characteristics analysis, it was interpreted that Eunsupo area was submerged in seawater especially at high tide in the past, and that ships could approach to the inside of the area through the tidal channel which were developed in the area. It is also assumed that ships were anchored at a low elevation point in the area. The paleo-environmental change in the area was analyzed based on the classification of sedimentary environment using grain size distribution of surface and borehole sediments and geochemical analysis. It was confirmed that the geomorphological interpretation for the possibility of ancient port location coincided well with the paleo-environmental change interpreted through sediment analysis. This study is a basic study for estimating ancient port location, and it is expected that more accurate paleo-environmental changes will be restored through detailed geomorphological survey and additional borehole analysis in the future research.

• 한국지형학회지
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• 제23권1호
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• pp.47-60
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• 2016

In this study, datum points measurement have been collected and then weather data have been analyzed to figure out erosion and deposition environmental change around Halmi-island, Baramarae. First of all, it was difficult to analyze geomorphological change which is caused by climate change because of quite short term of collection period of data. However, differences in spatial distribution of erosion and deposition have locally been shown. In all season, the wind is blowing in north and north-west direction mostly except in summer which is shifted to south direction. However, since its ratio which are above 5m/s is much lower than the north and north-west wind, its effect on geomorphological process is very tiny. In order to look at a tendency of erosion and deposition environmental change around Baramarae Halmi-island, the periphery of Halmi-island was classified to east and west part, then accumulated erosion and deposition values have been calculated. As a result, generally, the datum points are located in the west part which are mostly depositional sites. On the other hand, the datum points are located in east part showed the dominant erosion patterns.

• 한국지형학회지
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• 제26권3호
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• pp.19-30
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• 2019

This study summarizes domestic and foreign previous works on fluvial terrace with absolute ages to discuss formative process of climatic terrace in Korea. Different from traditional climatic terrace model, approximately three quarters from foreign works have argued that formation of climatic terrace can be attributed to medium- and short-term climatic change or other environmental factors, rather than long-term climatic change of glacial and interglacial cycles. Based on previous works on fluvial terrace in Korea, it can be suggested that fluvial terrace in Korea formed not due to long-term climatic change of 100,000-year cycles related to glacial and interglacial cycles, but due to medium- and short-term climatic change or climatic event of tens of thousands of years related to intensity change in summer monsoon, one of the important factors affecting precipitation in Korea.

• 한국지형학회지
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• 제23권2호
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• pp.1-13
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• 2016

This study analyzed pollen compositions in archaeological site on alluvial plain of Taehwa River, Taehwa-dong, Ulsan-si vegetational and environmental change during 6,200~3,000 yr BP. The results consist upward of Pollen Zone I (Inner Bay environment), Pollen Zone II (Quercus-Alnus stage) and Pollen Zone III (Alnus stage). The pollen grains of Fagopyrum and reddish gray silty horizon including artifacts of the Bronze Age suggest that there was cultivation on dry-field around the study site, although it is not sure that there was paddy-field cultivation.

• 한국지형학회지
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• 제28권4호
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• pp.31-39
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• 2021

Gaemok, the place name of Uihang-ri, Sowon-myeon, Taean-gun, Chungnam, indicates a tombolo. This study estimated the Holocene sea level change and development process of the coastal landforms of the Gaemok and Hwanyeong Tombolos in the Uihang coast. The tombolos seemed to form at approximately 3.4 ka and the average sea level at that time was estimated to be higher than that of the present by ca. 1 m. The Gaemok area was a separated island from the Taean peninsula during the Holocene Climatic Optimum. At approximately 3.4 ka when the sea level rose again after the fall, the Gaemok area was tied to the land by formation of the Gaemok and Hwanyeong Tombolos. The falling or fluctuating sea levels after 3.4 ka have shaped the present coastal landforms.

• 한국지형학회지
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• 제20권1호
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• pp.75-83
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• 2013

해안지역의 인위적 간섭은 토사의 생산 및 유출에 의해 지형적인 변동을 유발한다. 더욱이 해안변동을 안정화시키기 위한 구조물의 설치가 다른 지역의 지형을 변화시키는 요인이 되기도 한다. 그러나 대부분 해안지역에 대한 토사 유출자료는 구축되어 있지 않은 실정이다. 본 연구는 장기적인 해안변동 경향, 해안변동의 주요 인자인 토사유출의 정량적인 평가 방안, 그리고 이를 고려한 접속도로의 설계하중에 영향을 미치는 요소에 대해 적절한 방향을 제시하고자 한다.

• 대한원격탐사학회지
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• 제11권2호
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• pp.59-73
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• 1995

The study is focused on the analysis of geomorphological environment changes of alluvial bar in lower Kum river using satellite-based multitemporal/multisensor data. Landsat datas for environment changes analysis consists of Landset MSS(2 scenes) and Landset TM(7 scenes) acquired from 1979 to 1994. This study is to develop the analysis techniques for the environment change detection of using ratio, classification, false color composite etc, of Landsat data especially useful to the geomorphological study of tidal flats and river channels. The results of this study can be summarized as follows : 1. The lower Kum River alluvial bar have had rapid geomorphological changes after the construction of the temporary dam to block the river flowing in 1983. The most alluvial bar located in the river has both bankway growth, especially the allurival bar in the Lower Kum River had grown between 1983 to 1990. 2. After construction of the estuarine barrage, no remarkable geomorphological changes have been found in Kum River area but the growth and formation of new underwater bar has continued. The enormous materials was needed for the growth and formations of new underwater barrier oslands and bar would be supplied from the sea bottom and river sediment to diminish of stream velocity after construction of the estuarine barrage.

• 한국지형학회지
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• 제23권1호
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• pp.61-75
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• 2016

This study aims to reconstruct sea level change and paleogeomorphology since the middle Holocene by diatom analysis and 14C-dating from the sedimentary facies of three trenches on alluvial plain of Taehwa River, Taehwa-dong, Ulsan-si, South Korea. The Taewha-dong area was a narrow bay located between Bangeojin and eatuary of Taehwa River was a narrow bay which has been detached from the open sea during middle Holocene. Taewa-dong area at bay area was developed into alluvial plain by the sediments had been come from the Taewa river basin. The sea level change during the middle Holocene effected on the development of Taewha-dong alluvial plain and its information is included in the sediment facies.

• 한국지형학회지
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• 제19권3호
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• pp.135-142
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• 2012

일제강점기인 1910년에 작성된 1:50,000 지도(이하 근세 한국 오만분지일 지형도)는 전국을 망라한 최초의 근대적 방법에 의해 제작된 지도이다. 본 지도는 주로 인문 지리적 관점에서 이용되어 왔으나 최근 지도의 높은 정확성이 인식됨에 따라 다양한 분야에서 유용하게 되었다. 특히 해안분야에 있어서는 해안 구조물 건설에 따른 장기적인 지형변화를 제공할 것으로 기대된다. 본 연구는 독립된 해안 표사계에 대해 구조물의 건설 전후에 진행된 지형변화의 분석방법에 관한 것이다. 장기적인 해안의 지형변화를 분석하기 위한 기점은 1910년도의 지형도로 하였다.

• 한국지형학회지
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• 제20권1호
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• pp.97-109
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• 2013

만리포 사빈에 대하여 지상라이다(Terrestrial LIDAR)로 2008년 12월부터 2010년 1월까지 6회 조사된 3차원 정밀 지형을 이용하여 정량적 지형특성과 변화량을 분석하였다. 만리포 사빈은 해발고도 0m에서 1.5m사이에 가장 넓게 분포하고 있으며, 평균고조위인 해발고도 2.25m 이상에서는 사빈의 면적이 급격이 줄어든다. 지형변화 특성으로는 침식과 퇴적이 해안선을 따라 선적으로 나타나고 있으며, 북쪽 지역이 남쪽 지역보다 그 경향이 강하게 나타난다. 계절적 변화 특성으로는 봄에서 가을까지는 전반적인 침식이, 겨울에는 상대적으로 많은 양의 침식과 퇴적이 발생하였으며, 조사 시작과 종료시점의 체적은 큰 차이가 없는 것으로 분석되었다.