• 한국지형학회지
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• 제26권3호
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• pp.31-42
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• 2019

The geomorphological changes of an unvegetated part of the Okjukdong coastal dune were analyzed between 2008 and 2018. Its natural landscape has been destroyed after artificial forestation, but there is no quantitative evidence on these changes. In this study, we measured the unvegetated area using a total station and a network RTK-GPS in 2008, 2014, and 2018. Using Krging method for the three point data sets, we constructed digital elevation models (DEMs) and analyzed topographic changes between the three years. The results showed that the sand of the study area decreased in volume from 2008 to 2014, because sand supply from the nearby beach was blocked by coastal forests. The sand volume temporarily increased from 2014 to 2018, because of the dune nourishment conducted in 2017. It seems that the upper part of the sand dune has shrunk, but the sand at the bottom has increased over the last decade.

• 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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• 제24권2호
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• pp.1-13
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• 2017

Massive coastal sand dunes are distributed in Ui-island, Shinan-gun. The sand dunes in Ui-island is worth studying, in terms of preserving natural environment without anthropogenic impacts. In this study, we surveyed geomorphological processes of the sand dune based upon measuring of geometric properties, grain size analysis, and OSL(Optically Stimulated Luminescence) age dating. The sediments of the dune consist mainly of well sorted medium sand with about 250$\mu$m. Based on spatial distribution of sand dunes, we found that they are formed by northwest monsoon during winter, and sands are supplied from Seongchon area in northern UI-island. According to OSL age dating, the sand dunes were deposited from $0.07{\pm}0.01ka$ to $0.17{\pm}0.04ka$. This result shows that the transformation of the dune due to the sand movement by wind was active during the last 100-200 years. The aerial photograph indicates that the dimension of the largest sand dune has decreased since 1945. Further research is needed to get more detailed information on geomorphic changes of sand dunes in UI-island.

• 한국지형학회지
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• 제20권1호
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• pp.85-96
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• 2013

본 연구는 국립공원관리공단에서 시행한 국립공원 2 3기 자연자원조사 자료와 국립환경과학원 2 3차 전국자연환경조사 자료를 수집하여 공원별 지형경관자원을 유형별로 재분류하였다. 연구결과, 수집된 전체 국립공원 내 지형경관자원 수는 총 3,169개였다. 전체 경관자원 중 I등급으로 판정된 경관자원은 794개로 약 36.9%를 차지하였다. 다음으로, II등급으로 판정된 경관자원이 546개로 약 25.3%, III등급으로 판정된 경관자원이 459개로 약 21.3%, 마지막으로 보전등급이 낮은 IV등급으로 판정된 경관자원이 191개로 약 8.9%를 차지하고 있는 것으로 분석되었다. 국립공원별 I등급 경관자원 수는 설악산 207개소, 다도해해상 92개소, 지리산 84개소, 태안해안 60개소 순이었으며, 다도해해상국립공원과 설악산국립공원, 태안해안국립공원, 지리산국립공원, 속리산국립공원, 계룡산국립공원 등이 지형경관자원이 우수한 국립공원으로 평가되었다. 이러한 우수한 경관자원을 활용하기 위해서는 국립공원 탐방객에게 경관자원에 대한 이해와 관심을 높이고 탐방객의 만족도를 높이기 위한 조망지점이 필요하다. 이를 위해서는 우수경관 조망점 지도를 작성하여 탐방로 입구 혹은 일정지점에 설치하여 탐방객들에게 지형경관자원에 대한 유용한 정보를 제공해야 할 것으로 판단된다.

• 한국지형학회지
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• 제20권1호
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• pp.35-43
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• 2013

본 연구는 사도(중도와 증도를 포함)에 분포하는 지형 및 지질경관의 특성을 조사하여 생태관광 및 지오투어리즘 그리고 학생을 위한 현장체험학습의 기초 자료를 제공하는데 목적이 있다. 연구지역에 분포하는 지형 및 지질경관은 국립환경과학원(2007)의 분류 안에 따르면 9종류의 지형경관 그리고 한국환경정책 평가연구원(2003)의 분류 안을 따르면 17종류가 분포하고 있다. 이러한 지형 및 지질경관은 사도를 찾는 관광객을 위한 생태관광, 지오투어리즘을 위한 기초 자료가 될 뿐 아니라 초, 중등 학생이 교과서에 제시된 다양한 지형과 지질의 예를 경험하고 관찰할 수 있는 현장체험학습의 자료로서도 활용가치가 있다. 또한 한국환경정책 평가연구원(2003)에서 제시한 지형 및 지질 유산의 조사 대상에 대해서는 보다 전문적이고 정밀한 조사를 통해 이들의 보존가치를 판단할 필요성이 있다.

• 한국지형학회지
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• 제23권3호
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• pp.1-11
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• 2016

This study estimated vegetation environment and agricultural activity during the late Holocene inferred from pollen analysis of peat on floodplain of Wangpo-cheon around Neungsan-ri, Buyeo-gun, South Korea. By result of pollen analysis of 28 horizons from Trench NS 1 and NS 4, vegetation environment during 2,300 to 1,700 yr BP was divided into Pollen Zone I (Quercus-Alnus), Pollen Zone II (Quercus-Alnus-Gramineae) and Pollen Zone III (Pinus-NAP-Gramineae). The pollen analysis suggests that agricultural activity in the Buyeo area was widely spread from the early time of the Pre-Iron Age to the late Samhan Age and buckwheat field seem to be built to substitute paddy field during the early time of the Pre-Iron Age.

• 환경영향평가
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• 제11권1호
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• pp.51-66
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• 2002

The purpose of this study is to analyze the geomorphological environment changes of tidal flat in the Cheonsu Bay. Especially, it centers on the changes in the sedimentary environment using remote sensing data. Multi-temporal Landsat data and topographic maps were used in this study. The results are summarized as follows: the tidal flat of Cheonsu Bay changes in many ways depending on the direction of the tidal current. In the neighborhood of Ganwoldo, the scale of the tidal flat has continuously been expanded due to the superiority of sedimentation after a tide embankment was built. When we analyzed the grain size of sediments and implemented in-situ field survey, it was found that the innermost part of the bay consists of a mud flat, with the midway part mixed flat, and the nearest part to the sea sand flat. On the other hand, in the neighborhood of Seomot isle and its beach, sedimentation is superior in the eastern part whereas erosion is superior in the western part. In other words, the western coast of the beach is contacted with the open seas and under much influence of ocean wave. The eastern coast is placed at the entrance of the bay and has sand bar and tidal flat developed due to submarine deposits that are accumulated on the sea floor by the tidal current. In conclusions, remote sensing methods can be effectively applied for quantitative analysis of geomorphological changes in tidal flat, and it is expected that the proposed schemes can be applied to another geomorphological environments such as beach, sand dune, and sand wave.

• 한국지역지리학회지
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• 제17권3호
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• pp.297-312
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• 2011

현재까지 발굴된 고고 유적을 대상으로 고대 취락의 분포 및 입지 특성을 이해하는 것은 고대 취락의 형성과 소멸과정을 밝히기 위한 기초 연구에 해당한다는 점에서 의의가 있다. 지금까지 대부분의 연구들은 개별 주거지의 입지 환경에 관심을 가졌다. 하지만 본 연구에서는 주거지가 밀집한 구역의 지형 환경을 밝히고자 하였다. 연구지역은 충남 천안시에 위치한 백석동유적그룹이며, 이 지역에서 발굴된 205기의 청동기 시대 주거지를 연구대상으로 하였다. 이 연구에서 고려한 지형 환경은 사면 미지형, 지형경사, 사면방향이다. 연구지역에서 청동기 시대 주거지가 밀집한 주거지 밀집 구역의 지형 환경은 주로 정부사면 또는 정부평탄면의 파랑성 평야~준완경사지, 남향(남동향-남향-남서향) 사면으로 구성되어 있었다.

• 한국물환경학회지
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• 제30권3호
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• pp.319-328
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• 2014

Dorang - the Korean term for headwater streams - occupy a large portion of the total stream length in a basin, and contribute significantly towards the quantitative and qualitative characteristics, and the ecosystem, of the main river. The Ministry of Environment of South Korea has supported the investigation of the status of Dorang in the nation's four major basins, since 2007. Without a widely accepted academic or legal definition of Dorang, however, there are limits to understand the distribution of Dorang at the national scale and to systematically compile a Dorang database. This paper, through a review of the stream classification system and Korean legal system delineating streams, defines Dorang as 1st and 2nd order streams according to the Strahler ordering method, in a 1:25,000 geographical scale. Analysis of the Geum River basin, with this definition, reveals that the total length of Dorang is 20,622.4 km (73.6% of total stream length), and the number of Dorang catchments is 23,639 (71.3% of the basin area). Further analysis of the geomorphological characteristics of Dorang catchments shows that the average total stream length is 1.1 km, average catchment length is 1.2 km, average drainage area is $0.4km^2$, and average drainage density is 3.08/km.

• 한국지형학회지
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• 제25권1호
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• pp.67-80
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• 2018

This study used aerial and terrestrial images to build a three-dimensional model of cliffs located in Pado beach using SfM (Structure from Motion) techniques. Using both images, the study purposed to reduce the shadow areas that were found when using only aerial images. Accuracy of the two campaigns was assessed by root mean square error, and monitored by M3C2 (Multiscale Model to Model Cloud Comparison) method. The result of the M3C2 in closed areas such as sea cave and notch did not express the landforms partly. However, eroded debris on sea cliffs were detected as eroded area by M3C2, as well as in captured pictures by multi-camera. The result of this study showed the applicability of multi-camera and SfM in monitoring changes of sea cliffs.