• 한국농공학회지
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• 제44권6호
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• pp.61-70
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• 2002

This study was performed to analyze the river fractal characteristics using GIS (Geographic Information System). In this study, topographical factors in river basin were grid-analyzed for each cell size and scale using GIS and regression formula was derived by analyzing correlation among topographical factors and cell size which were calculated here. And, a new rainfall-runoff model which is considering the calculated fractal dimension was developed to apply fur a river basin.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2007년도 추계학술대회 논문집
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• pp.335-335
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• 2007

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 추계학술발표회 논문집
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• pp.389-392
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• 2004

A recent unusual change in the weather is formed as a localized heavy rain in a short time. This phenomenon has caused a flash flood, and flash floods extensively have damaged human lives many times. In large river's case, the extent of loss of lives and properties has been decreased through the flood warning system by flood control stations of each stream. However, the extent of damage in other small rivers has increased reversely. Therefore, it is necessary to establish a new flood warning system against flash floods instead of the existing flood warning system. It is a specific character that the damage from flash floods in mountain streams brings much more loss of lives than large river's flood. The purpose of this study is calculating the characteristic of flash floods in streams, analyzing topographical characteristics of water basin through applying GIS techniques with the calculation as mentioned above and researching what topographical conditions have influence on hydrological flash floods in water basin. The flash flood prediction model we used is made by GIUH (geomorphoclimatic instantaneous unit hydrograph) with hydrologic-topographical technology. As applying the flash flood prediction model, this is a procedure for calculating topographical information in basin: we made a topological data up out of database with utilizing GIS, and we also produced a DEM (digital elevation model) and used it as a topographical data for determining amount of flash floods.

• 한국지리정보학회지
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• 제4권4호
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• pp.51-60
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• 2001

본 연구는 지리정보시스템을 이용하여 하천유역에 있어서 프랙탈 특성을 분석하고자 하였다. 따라서 본 분석에서는 GIS를 이용하여 격자크기별 지형특성인자(유역면적, 유로연장, 유로중심장)을 산정하였으며, 여기서 산정된 인자들과 격자크기와의 상관분석을 통해서 상관계수 및 상관식을 유도하고, 또한 각 지형인자별 프랙탈 차원을 산정하였다. 격자크기에 대한 프랙탈 차원의 산정결과는 유로연장, 유역면적 및 유로중심장이 각각 1.028, 1.0026, 1.0061로 나타났다. 즉, 격자크기가 변함에 따라 가장 큰 영향을 받는 지형인자는 유로연장인 것으로 분석되었다.

• 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.

• 동굴
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• 제73호
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• pp.39-40
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• 2006

• 한국산림과학회지
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• 제94권3호통권160호
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• pp.129-134
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• 2005

이 연구는 김해시 상동면 매리 산사태지 1.5 ha에서의 발생특성 및 원인을 밝히기 위하여 수행한 것으로써 지형 및 지질적인 요인을 조사 분석하였다. 조사대상지의 모암은 섬록암이며, 상부사면 및 주변은 마산암으로 이루어져 있고, 너덜(Talus)이 산재하고 있는 것으로 나타났다. 이 산사태는 2004년 4월 19일에 발생되었으며, 산사태 발생 전 3일 동안의 연속강우량은 74 mm이었으나, 강우가 직접적인 영향이라기보다는 간접적인 영향을 미친 것으로 판단된다. 또한, 이 지역 땅밀림 산사태의 직접적인 원인은 깊게 형성된 붕적토층과 풍화토층 등 지질 지형적인 특성과 사면하단부 절취라 판단된다. 이 지역의 산사태 유형은 지하수에 의한 요(凹)지형 붕적토 땅밀림형 산사태에 해당한다.

• 수산해양기술연구
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• 제55권3호
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• pp.252-263
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• 2019

In order to understand the tidal current and mean flow at the west channel of Yeoja Bay in the South Sea of Korea, numerical model experiments and vorticity analysis were carried out. The currents flow north at flood and south at ebb respectively and have the reversing form in the west channel. Topographical eddies are found in the surroundings of Dunbyong Island in the east of the channel. The flood currents flow from the waters near Naro Islands through the west channel and the coastal waters near Geumo Islands through the east channel. The ebb currents from the Yeoja Bay flow out along the west and the east channels separately. The south of Nang Island have weak flows because the island is located in the rear of main tidal stream. Currents are converged at ebb and diverged at flood in the northwest of Jeokgum Island. Tidal current ellipses show reversing form in the west channel but a kind of rotational form in the east channel. As the results of tide induced mean flows, cyclonic and anticyclonic topographical eddies at the northern tip but eddies with opposite spin at the southern tip are found in the west channel of Yeoja Bay. The topographical eddies around the islands and narrow channels are created from the vorticity formed at the land shore by the friction between tidal currents and the west channel.

• 한국지형학회지
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• 제25권4호
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• pp.103-116
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• 2018

The purposes of this research are as follows: First, to reconstruct the optimal locational environment of the Bronze Age settlement in Cheonan Baekseok-dong (hereinafter referred to as the study settlement). Second, to identify the priority ranking of the topographical factors that influenced the Bronze Age people when selecting their the settlement location. For these reasons, the topographical factors of the 200 Bronze Age dwellings (hereinafter referred to as dwellings) confirmed in the survey area were analyzed through the ridge's environmental perspective. The results are asfollows: First, the optimal ridge environment of the Bronze Age settlement is largely a sub-ridge in N-S direction (for example, NNW-SSE, N-S, NNESSW), especially at the top (Crest slope, Crest flat) of the south-facing aspect of the ridge. Second, when the Bronze Age dwellers selected a residential location, they carefully considered topographical factors in the following order: (1) the slope direction of the ridge surface, (2) the micro-landform of the ridge, (3) the ridge scale, (4) the ridge direction, and (5) the surface relief. The results of this study could be used as basic data in related fields such as archaeology, quaternary research, and traditional architecture and so on.

• 한국생태학회:학술대회논문집
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• 한국생태학회 1999년도 국제 Symposium 및 '99 춘계 공동 학술 발표대회
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• pp.97.1-97.1
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• 1999