• 제목/요약/키워드: geomorphological characteristics

검색결과 229건 처리시간 0.021초

연천 은대리 물거미 서식지의 지형적 특성 (Geomorphological Characteristics of the Water Spider Habitat in Yeoncheon)

  • 양재혁
    • 한국지형학회지
    • /
    • 제25권4호
    • /
    • pp.77-88
    • /
    • 2018
  • Wetlandsis developing on the lava plateau in Eundae-ri, even though there are no majorstreams into this area. As a result of drilling, 1~2m clay layer is founded under the superficial formations of the wetland, which are the main reasons for formation of the wetlands by limiting vertical drainage. The clay layer's Granulometry/XRD show very different characteristics from in situ weathering of basalt, and since 2~3cm of sand layer exist within the profile, the clay layer seems to be supplied and deposited from outside through surface/sheet flows. To keep the wetlands sustainably, the supply of water into the wetlands has to be increased by restoring the surface/sheet flow which is limited or deformed by pavement road.

우이도 해안사구의 지형특성과 형성과정 (The Processes of Coastal Dunes and its Geomorphological Characteristics, Ui-island, Shinan-gun, Korea)

  • 신원정;김종욱;김종연;최정헌
    • 한국지형학회지
    • /
    • 제24권2호
    • /
    • pp.1-13
    • /
    • 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.

오대산 국립공원의 지질 및 지형경관자원 조사를 통한 관광지질학적 가치 증진: 지구과학의 대중적 이해 (Value Promotion for Tourism Geology through Survey on Geological and Geomorphological Landscape Resources in the Odaesan National Park: Public Understanding of Earth Science)

  • 허철호;김성용;윤성택
    • 한국지구과학회지
    • /
    • 제26권3호
    • /
    • pp.218-231
    • /
    • 2005
  • 이 연구의 목적은 오대산 국립공원 일대의 지질 및 지형경관자원을 조사하여 그 특성을 분석하고, 이들 가운데 경관과 학술적으로 보존가치가 있는 지질 및 지형경관자원을 선정, 이들을 체계적으로 관리, 활용하는 방안에 필수적인 자료를 제시하고자 하는 것이다. 이 조사과정에서는 147개의 지질 및 지형경관자원을 조사하였다. 조사지역에서 가장 많이 관찰되는 지형은 구조지형이며, 다음으로는 풍화, 하천, 산지, 호소, 주빙하 지형 등이다. 다양한 지질 및 지형경관 자원 가운데 4개 노두가 관광자원으로 활용될 수 있고, 5개 노두는 학술연구를 위한 가치 있는 자원으로서 고려될 수 있다. 상기 조사자료는 관광지질학 활성화를 목적으로 지질관광 대상지역의 다양성 제고를 촉진하고, 국립공원관리공단 에서 탐방객에게 제공하는 자연해설 프로그램의 다양화와 기능성 제고를 배가하는데 유용할 것으로 판단된다.

고대국가 사로국과 신라의 수도 경주의 입지에 미친 지형 특성 (The Geomorphic Characteristics on the Location of Gyeongju, Capital City of 'Saro' and 'Silla' Kingdomsin Ancient Times, Korea)

  • 황상일;윤순옥
    • 한국지형학회지
    • /
    • 제20권3호
    • /
    • pp.79-94
    • /
    • 2013
  • 삼한시대 영남지방의 소국 가운데 하나였던 경주는 한반도의 남동쪽에 치우쳐 있음에도 불구하고 천년 동안 고대국가의 수도로 유지되고 성장하였다. 전 세계에서 유래가 드문 이와 같은 사례는 경주 지역에 살았던 사람들의 정치적 능력과 지혜 등 다양한 요인에 기인하지만, 이들이 살았던 지역의 자연환경도 크게 영향을 미쳤을 것이다. 경주에서 고대국가의 성립과 발전을 소백산맥과 태백산맥, 단층선과 선상지의 분포, 해안 분포 특성과 관계지워 논의하였다. 지형 특성은 경주 지역에 경작지 확보를 통한 풍부한 곡물의 공급, 높은 인구부양력과 거대 도시의 입지를 가능하게 하였다. 경주는 동해안에서 결절율이 가장 높은 위치를 점하여 소금과 철제품의 생산과 유통을 통해 부를 축적하고, 우월한 군사적 입지로 주변국과의 경쟁에 유리한 위치를 차지했다. 경주는 지형특성으로 인한 입지적 장점으로 고대국가의 중심지가 되었다.

하계망으로 본 영산강 유역 옹관묘의 입지특성 (Location Characteristics of the Jar Coffins in the Yeongsan River Basin on the Drainage Network)

  • 이애진;박지훈;이찬희
    • 한국지형학회지
    • /
    • 제23권3호
    • /
    • pp.57-66
    • /
    • 2016
  • The objective of this study is to find out geomorphological characteristics of historical ruins where people produced and consumed large jar coffins excavated in the Yeongsan river basin using the map of old drainage network to restore distribution network. For this purpose, we chose the 21 consumption sites. The results are as follows. First of all, large jar coffins(relics, 47.6% of total) in the Yeongsan River basin were located in Sampo stream basin, almost all of them were located within the Yeongsan River main stream basin and Sampo stream basin. Also, distance from all consumption site to river was within about 2km. Therefore, it is thought that the all consumption sites are located at the place of the gift of nature that was very favorable to water transport of jar coffins. The results of this study may be used as basic data for research of cultural relics in the Yeongsan river basin.

전남 영산강 유역에 있어서 옹관묘 입지의 지형환경 분석 (Analysis of Geomorphological Environment forthe Jar Coffins Location in the Yeongsan River Basin in Jeonnam Province)

  • 박지훈;이찬희
    • 한국지형학회지
    • /
    • 제23권3호
    • /
    • pp.13-25
    • /
    • 2016
  • The purpose of this study is to investigate the location characteristics in which 'large Jar coffin' (hereinafter referred to as 'Jar coffin') distributed in the Yeongsan river basin area in Jeonnam province by means of topographic analysis. 75 Jar coffins (74.3%) in 19 relics (90.5% of total) were found in hill and 26 Jar coffins (25.7%) of two consumption relics (9.5%) were found in floodplain. Among them, 34 (45.3% of total) and 41 (54.7% of total) Jar coffins were found in the Crest surface and Sideslope of hills, respectively. In particular, 26 (34.7%) Jar coffins are mostly located in the Crest flat. This result implies that people at that might be consider the river inundation, and mostly choose hill rather than floodplain when building the Jar coffin. therefore amongtherefore among micro-landform units of the hill, it seems that the 'Crest flat' was the preferred place for the building the Jar coffin at that time.

태백 산지 북부의 하천 하각률 분포 (Distribution of Stream Incision Rates in the Northern Part of the Taebaek Mountains)

  • 이광률
    • 한국지형학회지
    • /
    • 제25권4호
    • /
    • pp.1-19
    • /
    • 2018
  • This study tries to identify distributional characteristics of stream incision rates at 23 points in the northern part of the Taebaek Mountains. Soyang-gang, Naerin-cheon, Odae-cheon, Dong-gang and upper reaches of Okdong-cheon Rivers closed to the Range show higher incision rates and the rates clearly decrease with distance from the Range. Therefore, the incision process in the northern part of the Range has been greatly influenced by uplift around the Range, and the Sobaek Mountain Range seem to play a role in the incision process. Limestone areas show lower incision rates due to degradation of terrace surface by dissolution. This study suggests that local hydrological, geological and geomorphological conditions can be regarded as an important factor in stream incision rates, although stream incision rates are greatly influenced by regional uplift.

산이동 설화에 대한 지형학적 검토 (A Study on Characteristics of Mountainous Landforms Associated with Folklore and Geo-storytelling)

  • 박경
    • 한국지형학회지
    • /
    • 제26권3호
    • /
    • pp.43-52
    • /
    • 2019
  • Place names or toponyms including Gosan, Busan and Buraesan can be very important and interesting storytelling subjects in terms of geomorphology and folklore studies also. Several studies done by folklorists, those sixty five mountain-moving stories with similar names can be grouped into several categories through formation processes and origin, transport media and imposition of tax. Geomorphological studies can focus on transport media. They can be classified into six different categories; 1) flood from upstream through river, 2) voluntary walk of mountains, 3) by wind, 4) upwelling from underground, 5) involvement of mythical beings such as Mago Granny or Dokkaebi (kind of goblin), or 6) migration by ocean current.

화강암 분지를 흐르는 미호천의 지형학적 특색 (Geomorphological Characteristics of the Miho Stream Flowing through a Granitic Plain, South Korea)

  • 김영래
    • 한국지형학회지
    • /
    • 제28권3호
    • /
    • pp.1-11
    • /
    • 2021
  • The drainage area of the Miho stream is composed of granitic basins, gneissic and sedimentary mountains. 80 percent of the Miho stream flows through the Jincheon basin and the Cheongju inner-plain within the Daebo granite belt. Because the deep weathering of granitic hills provides a large amount of sands to the streams, there are wide floodplains with thick alluvium developed in the basin and plain. The thickness of the alluvium is 5~10m and the width of the floodplains is 2~2.5km. In the basin outlet area where a stream passes through the mountain canyon, wide floodplains and deep alluvium are developed in other riverside. The Miho stream is a sand-gravel channel flowing through the Cheongju inner-plain with wide floodplains and deep alluvium formed by deep weathering of granite.