• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.168-172
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• 2007

소유역의 배수시설물 설계를 위한 확률강우량 결정에는 일반적으로 건설교통부 (2000)에 의해 제시된 강우강도식을 이용하며, 강우의 지속시간이 10분이하인 경우에도 통상 제시된 강우강도식의 지속시간 최소단위인 10분을 그대로 적용하는 것이 일반적이다. 따라서 도달시간이 수 분 정도인 도로 배수시설물의 경우에는 상대적으로 과대설계가 될 가능성이 크다. 본 연구에서는 이러한 문제점을 극복하고자 모포마 분포를 시자료에 적용하여 분단위 연최대치 강우계열을 구성하고 이를 빈도해석하여 확률강우량을 추정하였다. 1분단위 강우자료(MMR 자료)를 이용하여 빈도해석을 수행한 결과 기존 건설교통부 (2000)에 의해 제시된 강우강도식은 분단위로 내삽할 수 없음을 확인하였다. 60분 집성자료를 모포마 분포에 적용하여 추정한 지속시간별 분단위 연최대치 강우계열은 관측된 분단위 연최대치 강우계열의 특성을 적절히 설명할 수 있는 것으로 파악되었다. 따라서 모포마 분포를 이용하는 경우 시단위자료를 이용하여 1분단위 자료의 특성 재현이 가능한 것으로 판단된다. 60분 집성자료와 시단위 자료를 이용하여 모포마 분포에 각각 적용하여 IDF 관계를 유도한 경우 그 차이는 매우 미미한 것으로 나타났다. 아울러 사용된 자기상관함수에 따른 차이도 미미한 것으로 확인되었다. 따라서 모포마 분포는 시단위 자료로 부터 60분 이하의 지속시간에 대한 연최대치 강우계열을 적절히 재현할 수 있는 방법인 것으로 판단된다.

• 한국지구과학회:학술대회논문집
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• 2010.04a
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• pp.59-62
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• 2010

The limitation of constant for tide correction is identified using the T_tide $MATLAB^{(R)}$ package. A suggestion is presented in calculation of local phase lag(k) by a/15 (a is angular speed of any constituent in degree) from the g, phase lag measured by standard time meridian latitude.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.26 no.6
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• pp.352-358
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• 2014

Hourly tide-gauge data at 10 tide stations along the West/South coasts were analysed statistically for tidesurge interaction. Interactions were found at all stations except Busan, prominently at the western tip of the South coast near Mokpo and Wando. A well-known interaction pattern which occurs at flood tide was found rarely at domestic coasts, while another pattern of the tide-modulated surge which occurs at low tide was detected frequently. In addition, a new interaction pattern which occurs at ebb tide is discovered. This pattern is found at Mokpo where the ebb dominance is prominent. Finally, the skew surge could be considered as a tool coping with such interactions.

• The Journal of Engineering Geology
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• v.18 no.1
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• pp.1-6
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• 2008

Precipitation and groundwater level data sets from Kum river watershed were analyzed and compared. The correlation between groundwater level and the moving average of precipitation was analyzed. Moving averaging technique is stochastic method and that was used to consider the effect of precipitation events on groundwater level fluctuation. Groundwater level generally follows seasonal precipitation pattern and low level occurs from early December to late April. Relatively high groundwater level is appeared in wet spell (July and August). The correlation between groundwater level and the moving average of precipitation to consider precedent precipitation events was analyzed with minimum two-year data sets. When the precipitation and groundwater level data set pair was selected the precipitation gauge station is closely located to groundwater level gauge station in the upstream direction to minimize the non-homogeneous precipitation distribution effect. The maximum correlation was occurred when the averaging periods were from 10 days to 150 days with Kum river watershed data. The correlation coefficients are influenced by data quality, missing data periods, or snow melt effect, etc. The maximum coefficient was 0.8886 for Kum river watershed data.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.26 no.6
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• pp.567-579
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• 1993

The response of sea levels to a typhoon in the north Japanese coast in the Japan Sea is investigated by using hourly ses level data($1966{\sim}1986$) and a numerical shallow water model with high resolution($5'{\times}5'$). The observed sea level analysis shows (1) progressive waves exist between Simonoseki(SS) and Maizuru(MZ) with the mean phase speed of about 4 m/s during the passage of the typhoon, (2) the phase speed between Sasebo(SB) and HK(Hakata) is slower(about 1.7 m/s), and (3) the maximum sea level at HK is achieved about 0.5 day later than that of SS. In many aspects, the numerical model results correspond well to the above observed features. In the model the progressive waves are identified as a topographic wave with the phase speed of about 4 m/s. Before the typhoon passes through the Korea Strait/ the Tsushima Strait, the wave propagations along the Japanese coast are significantly influenced by the southwestward coastal jet induced by the wind stress parallel to the coast. The waves start to propagate northeastward along the coast when the coastal jet is weakened.

• Journal of the Korean Society of Groundwater Environment
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• v.6 no.2
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• pp.76-86
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• 1999

It is necessary to estimate the groundwater recharge rate properly to predict the demand of groundwater and to establish the plan for the development of groundwater in the future. In this paper, A small basin in Chojung area is selected to calculate the groundwater recharge rate. In the calculation, water balance analysis, SCS-CN (Soil Conservation Service-Curve Number) method. groundwater-level analysis and hydrograph of outflow analysis are applied to this area. Data of precipitation measured by Chungju climatological station for about 10 years are used for water balance analysis and SCS-CN method. For the groundwater-level analysis. variations of groundwater-level measured from the 3 test wells in 1997's are used and stage-discharge rating curves in this area for 3 years are used for the hydrograph of outflow. The recharge rate calculated by water balance is 19%, 12.95% by SCS-CN method. 16.51% by groundwater-level analysis and 10.9% by hydrograph of outflow analysis and the overall average recharge rate is about 14.84%.

• The Korean Society of Law and Medicine
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• v.14 no.1
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• pp.147-208
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• 2013

In der vorliegenden Arbeit geht es um die vergleichende Betrachtung von deutschen Urteilen OLG Munchen, Urt. v. 21. 4. 2011 - Az. 1 U 2363/10; BGH, Urt. v. 22. 5. 2012 - VI ZR 157/11) und einer Reihe von koreanischen Urteilen im Bereich des Arzthaftungsrechts. Sie behandelt die Kausalitat von Tatbestand und Rechtswidrigkeitszusammenhang in der normativen Haftungszurechung. In Korea gilt die sog. Adaquanztheorie noch entscheidend als bewertendes Zurechnungskriterium - sogar manchmal als umgangssprachliches Homonym im Sinne der Verh$\ddot{a}$ltnism$\ddot{a}{\ss}$igkeit angewendet -, die dogmengeschichtlich von Deutschland $\ddot{o}$bernommen wurde. Doch wie aus den deutschen Urteilen ersichtlich, ist sie dort schon $\ddot{u}$berwunden. Die Ergebnisse der betrffenden koreanischen Urteile sind zwar nicht unbillig, deren Urteilsbegrundungen aber theoretisch bzw. praktisch nicht $\ddot{u}$berzeugend. Nach allgemeiner Ansicht kommt es vielmehr auf den Schutzzweck an, der auch bei der Anwendung des ${\S}$ 393 KBGB gelten kann. Schlie${\ss}$lich wurde die $\ddot{U}$bertragung des praxisgerechten L$\ddot{o}$sungsansatzes in deutschen Urteilen auf rechtsvergleichende Weise dazu beitragen, die Zivilrechtspraxis in der koreanischen Justiz nachvollziehbarer machen.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.26 no.2
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• pp.72-80
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• 2014

The approximately highest high water(AHHW), which has been used frequently as a basis of the design sea level, has not only ambiguous return period but also spatio-temporal problems induced by sea level rise and the spatial variability of tidal characteristics. The ratios of 4 major constituents with other constituents were investigated. In addition, tidal data were analyzed by probability density function. The temporal variability may be cured by using the latest tidal data. And the AHHW at summer was examined to lessen the spatial variability. The results show that the design sea levels need to increase by 10 cm or more at the Southern Coast and by 15~25 cm at the East Coast.

• Journal of Environmental Impact Assessment
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• v.26 no.6
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• pp.445-456
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• 2017

For impact assessment of inundation in coastal area due to sea level rise (SLR), model for estimating future peak water level was constructed using observed mean sea level (MSL), storm surge level (SSL) data and calculated tide level (TL) data. Based on time series analysis and quadratic polynomial model for SLR and Monte-Carlo simulation for IC, SSL and TL, 100-year return peak water level is expected to be 2.3, 2.6, 2.8m, respectively (each corresponding to year 2050, 2080, 2100). Further analysis on future potential inundation area showed U-dong, Yongho-dong, Songjeong-dong, Jaesong-dong to be at high risk.

• Proceedings of the Korea Water Resources Association Conference
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• 2010.05a
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• pp.1555-1559
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• 2010

본 연구는 미래 물 관리를 위한 기후변화 대응방안 도출 연구의 사전연구로서 금강유역의 과거 기상 수문요소의 특성변화 분석을 수행하였다. 기상자료로 금강유역 기상관측소 8개소의 37개년(1973~2009)의 기온, 강수량, 상대습도 자료를 수집하였다. 하천수위자료는 수위자료와 수위-유량관계곡선의 신뢰성 문제, 이후 수행될 장기유출분석을 고려하여 최종적으로 공주, 규암 수위관측소의 36개년(1973~2008)의 자료를 이용하였고, 지하수위자료는 강우관측소와 근접하게 위치해 있으면서 과거 자료를 최대한 많이 보유하고 있는 6개 관측소의 10개년(1999~2008)의 자료를 이용하였다. 수집된 자료의 평균, 표준편차, 왜곡도, 변동계수를 산출하여 연 계절별로 수문기상인자의 경년변화를 파악한 결과 기상인자 중 강수량의 변동성이 가장 크게 나타나 경년별 변화가 큰 것으로 분석되었고 하천수위보다는 지하수위가 경년별 변동이 적은 것으로 분석되었다. 수문학적 지속성 분석을 위해 Run 검정, Turning Point 검정, Anderson Exact검정을 이용하여 시계열자료에 주기성이 있는지 분석한 결과 기온과 강수는 무작위성, 상대습도, 하천수위는 지속성을 가지는 인자로 분석되었고 지하수위는 관측소별, 기간별로 무작위성과 지속성이 혼재되어 있는 것으로 나타났다. 마지막으로 경향성 분석을 위해 단순 선형 회귀분석과 Mann-Kendall 검정을 이용하였다. 그 결과 기온은 연 계절 모두 증가경향이 나타났고, 강수량은 여름에만 증가경향이 나타났으며, 상대습도는 뚜렷한 감소경향을 보였다. 또한 하천수위는 감소경향이 나타났으며 지하수위는 유의수준 범위에서 경향성은 보이지 않았다. 본 연구의 결과는 기후변화로 인해 발생될 수 있는 수자원의 영향을 평가하고 미래 물 관리 적응기술 개발 및 계획 수립을 위한 자료로 활용될 수 있을 것으로 사료된다.