• 자원환경지질
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• 제11권3호
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• pp.99-108
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• 1978

The Gum-Ho river basin is one of the densely populated area having more than 35% of the total population and it was also well irrigated since earlier days in the Nackdong river basin. Most of the easily developed source of surface water are fully utilized, and at this moment the basin is at the stage that no more :surface water can be made available under the present rapid development of economic condition. Since surface water supplies from the basin have become more difficult to obtain, the ground water resources must be thoroughly investigated and utilized greatly hereafter. In economic ground of the basin what part could ground water play? In what quantities and, for what uses could it be put? The answer to these questions can be relatively simple;the ground water resources in the basin can be put at almost any desired use and almost anywhere in the basin The area of the basin is at about $2088km^2$ in the middle part of Nackdong river basin and it is located along the Seoul-Pusan express highway. The mean annual rainfall is about 974.7mm, most of which falls from June to September during the monsoon. Accumulated is appeared approximately after every 8 year's accumlated dry period with the duration of 5 years. The water bearing formation in the basin include unconsolidated alluvial deposits in Age of Quaternary, saprolite derived from weathered crystalline rocks, Gyongsang sedimentary formations of the period from late Jurassic to Cretaceouse, and igneouse rocks ranging of the Age from Mesozoic to Cenozoic. The most productive ground water reservoir in the basin is calcareous shale and sandstones of Gyongsang system, which occupies about 66% of the total area. The results of aquifer test on Gyongsang sedimentary formation show that average pumping capacity of a well drilled into the formation with drilling diameter and average depth of $8{\frac{1}{2}}$ inch and 136m is $738m^3/day$ and also average specific capacity of those well is estimated $77.8m^3/D/M$. Total amount of the ground water reserved in the basin is approximately estimated at 37 billion metric tons, being equivalent 18 years total precipitations, among which 7 billion metric tons of portable ground water can be easily utilized in depth of 200 meters.

• 한국광물학회:학술대회논문집
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• 한국광물학회.한국암석학회 2001년도 공동학술발표회 논문집
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• pp.95-95
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• 2001

The Yeongdong basin is one of the pull-apart basins in the southwestern part of the Korean Peninsula that has developed during Cretaceous sinistal fault movement. The bimodal igneous activities (basalts and rhyolites) in the basin appear to be closely associated with the basin development. Here, we discuss the origin of the igneous rocks using chemical and radiogenic isotope data. Basaltic (48.4-52.7 wt% SiO$_2$) and rhyolitic (70.3-70.8 wt% SiO$_2$) rocks are slightly alkalic in a total alkali-silica diagram. The rhyolitic rocks with have unusually high K$_2$O contents (5.2-6.0 wt%). The basaltic rocks show an overall pattern of within-plate basalt in a MORB-normalized spider diagram, but have distinct negative anomaly of Nb, which indicates a significant amount of crustal component in the magma. The basaltic rocks plot within the calc-alkaline basalt field in the Hf/3-Th-Ta and Y/l5-La/10-Nb/8 discrimination diagrams. The eNd(T) values of the basaltic rocks (-13.6 to 14.3) are slightly higher than those of the rhyolitic rocks (-14.1 to 15.2), and the initial Sr isotopic ratios of the former (0.7085-0.7093) are much lower than those of the latter (0.7140-0.7149). However, the initial Nd and Sr isotope ratios of the igneous rocks in the Yeongdong basin are similar to those of the nearby Cretaceous igneous rocks in the Okcheon belt. The Pb isotope ratios plot within the field of Mesozoic granitoids outside of the Gyeongsang basin in Pb-Pb correlation diagrams. Since a basaltic magma requires the mantle source, the enriched isotopic signatures and negative Nb anomaly of the basaltic rocks suggest two possibilities for their origin: enriched mantle lithospheric source, or depleted mantle source with significant amount of crustal contamination. However, we prefer the first possibility since it would be difficult for a basaltic magma to maintain its bulk composition when it is significantly contaminated with granitic crustal material. The slightly more enriched isotopic signatures of rhyolitic rocks also suggest two possibilities: differentiate of the basaltlc magma with some crustal contamination, or direct partial melting of the lower crust. Much larger exposed volume of the rhyolitic rocks, compared with the basaltic rocks, indicates the latter possibility more favorable.

• 기술사
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• 제10권2호
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• pp.13-26
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• 1977

The Kum-Ho river basin is one of the densely populated area having more than 35% of the total population and it was also well irrigated since ealier days in the Nackdong River Basin Most of the easily developed source of surface water are fully utilized, and at this moment the basin is at the stage that no more surface water can be made available under the present rapid development of economic condition. Since surface water supplies from the basin have become more difficult to obtain, the ground water resources must be thoroughly investigated and utilized greatly hereafter. In economic ground of the basin what part could ground water play\ulcorner In what quantities and, for what uses could it be put\ulcorner The answer to these questions can be relatively simple; the ground water resources in the basin can be put at almost any desired use and almost anywhere in the basin. The area of the basin is at about 2088km$^2$ in the middle part of Nackdong River Basin and it is located along the Seoul-Pusan Express Highway. The mean annual rainfall is about 974.7m/m, most of which falls from June to September during the monsoon. Accumulated wet period is appeared approximately after every 8 year's accumulated dry-period with the duration of 5 years. The water bearing formations in the basin include unconsolidated alluvial deposits in Age of Quatenary, saprolite derived from weathered crystalline rocks, Kyongsang sedimentary formations of the period from late Jurassic to Cretaceouse, and igneouse rocks ranging of the Age from Mesozoic to Cenozoic. The most productive ground water reservoir in the basin is calcareouse shale and sandstones of Kyongsan system, which occupies about 66% of the total area.

• 물과 미래
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• 제26권3호
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• pp.125-135
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• 1993

본 연구의 목적은 도시유역에 적합한 유량 및 수질 모형을 선택하고 그 모형을 임의의 대상유역에 적용하여 그 적합성을 판정하는 데 있다. 본 연구를 위하여 선택된 모형은 EPA의 SWMM 모형으로, 이 모형은 도시유역의 유량 및 수질, 특히 NPS(non-point source) 오염물의 배출의 모의에 적합한 모형이며, 실제 적용에 있어서는 지표면유출을 위해서는 Runoff Block을, 관거 추적을 위해서는 Transport Block을 사용하였다. 본 연구의 적용대상유역은 전형적인 도시유역인 서울시 동대문구 용두유수지 유역이며, 이 유역을 위한 기존의 4개의 연속유량 측정치와 2개의 연속수질 측정치를 가지고 모의를 수행하였다. 유량 및 수질, 특히 NPS 부하량의 검정을 첨두치, 첨두시간, 유출 및 배출 용적과 그들의 상대오차에 대하여 수행하였으며, 그 결과, SWMM 모형은 유출 및 NPS 오염물 배출 모두를 모의하는데 적합한 모형임이 밝혀졌다. 본 연구의 결과는 차후 도시유역의 유출과 NPS 오염물 배출간의 상관관계의 분석 및 그를 통한 유역의 오염물의 년, 월, 부하량의 산정을 통한 물질수지계산 방법의 연구에 바탕이 될 수 있을 것이다.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1999년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall
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• pp.45-51
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• 1999

The attenuations of peak vertical displacements are studies using a conventional least squeare regression technique for microearthquakes occurred in the Kyungsang Basin southeastern Korea. The regression model applied to bandpass-fitered ground motion data includes parameters to account for geometric spreading anelastic attenuation depending on frequency source size and station site effects. Thirty nine displacement traces obtained by integrating velocity records for six shallow local microearthquakes are used to determine attenuation characteristics in the Basin. The regression result of the peak amplitude data leads to Q(f)=59.9 {{{{ {f }^{0.955 } }} for 1.5Hz$\leq$ f $\leq$ 25 Hz. It appears that the anelastic attenuation in the Kyungsang Basin is greater than that in the Western North America Area.

• 한국환경과학회지
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• 제18권9호
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• pp.983-992
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• 2009

The purpose of the present study is to analyze pollutant runoff characteristics from non-point sources in Joman River basin. The present study contains analyzed results of rainfall and SS, BOD, COD, TN, TP runoff from Joman River basin. This study contains a sensitivity analysis of parameters that affect the simulation results of rainfall and pollutants runoff. Result of the sensitivity analysis shows that proportion of watershed and impervious areas is the most sensitive to peak discharge and total flowrate for rainfall runoff and that WASHPO is the most sensitive parameter for pollutants runoff. For parameter estimation and verification, flowrate and water quality is measured at the Kangdong Bridge in Haeban stream. A single rainfall event is use to perform parameter estimation and verification. Results of the present study show that total pollutant loads of Joman River basin is 11,600 ton of SS, 452 ton of BOD, 1,084 ton of COD, 515 ton of TN, and 49 ton of TP, respectively. In addition, it is found that contribution ratio of non point source and total source is 89% of SS, 63% of BOD, 61% of COD, 21% of TN, and 32% of TP, respectively.

• 대한지리학회지
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• 제45권4호
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• pp.431-443
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• 2010

한반도 남부 13개 선상지를 일본, 대만, 필리핀의 690개 선상지와 비교, 분석하였다. 선상지 경사와 함양역 면적, 선상지 경사와 함양역 기복비, 선상지 면적과 함양역 면적, 그리고 함양역 면적과 함양역 기복비와의 관계를 정량적으로 검토한 결과, 한반도 남부의 선상지는 아시아의 선상지 특성과 잘 부합되지만, 선상지 빈도와 밀도가 낮다. 또한 선상지 하천의 함양역 규모가 작고, 기복비가 커서 선상지 규모가 작고 경사가 급하다. 36개 주요 하천 곡구부에서 선상지가 형성되지 않는 것은 상대적으로 낮은 산지고도와 함양역의 기복비 때문이다. 한국의 선상지에서는 Blair and McPherson이 주장한 지형면 경사의 공백을 확인할 수 없으며, 경주 선상지는 경사가 완만한 하성 선상지의 가능성이 높다.

• 한국석유지질학회지
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• 제12권1호
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• pp.1-8
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• 2006

중국 산동반도에는 백악기 육상 퇴적분지인 교래분지가 발달하고 있으며, 여러 지역의 노두에서 다양한 형태의 유징이 나타난다. 교래분지는 전기 백악기와 후기 백악기에 걸쳐 발달한 인리형 분지로 하호성 퇴적물과 화산암으로 구성된다. 교래분지의 퇴적층은 3개의 층으로 구분되는데 하부로부터 래양층 (萊陽層), 청산층 (靑山層), 왕씨층(王氏層)이다. 전기 백악기에 속하는 래양층은 적색과 비적색 하호성 퇴적물로 구성되며 역암, 사암, 셰일을 포함한다. 청산층 역시 전기 백악기에 속하는데 여러 종류의 화산암으로 구성된다. 후기 백악기에 속하는 왕씨층은 적색의 역암, 사암, 셰일 등으로 구성된다. 아스팔트, 기름 냄새, 스며 나온 기름통의 다양한 형태의 유징이 여러 지역의 노두에서 관찰되지만 유전은 발견되지 않았다. 3개의 지층 중에서 비교적 풍부한 유기물을 포함하는 지층은 래양층이다. 래양층의 일부 흑색 혹은 회색 세일의 유기물 함량은 1% 이상이며, 타이프 I 혹은 타이프 II의 특성을 가지는 유기물 기원의 케로젠을 포함하는 층준들이 있다. 열적 성숙도는 주 석유 생성단계에 도달하였고, 석유생성 잠재력도 비교적 높아 래양층의 흑색 세일은 석유 근원암으로 유망하다.

• 한국해양공학회지
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• 제19권3호
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• pp.47-53
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• 2005

Model for dust and salt transportation from the dried bottom of the Aral Sea is suggested. Theoretical analysis is based on the turbulent diffusion equation for the averaged function of passive impurity concentration. One-layer model of the atmospheric boundary layer is assumed. Impurity precipitation rates are calculated as the functions of the particle size and the distance source of particles. Analytical solutions for the point and two-dimensional sources of impurities are found. Model calculations for salt and sand transport from the Aral Sea basin are made on the basis of 2D source model with a constant intensity.

• Environmental Engineering Research
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• 제19권3호
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• pp.197-203
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• 2014

This study estimated spatial and seasonal variation of water quality to understand characteristics of Nakdong river basin, Korea. All together 11 parameters (discharge, water temperature, dissolved oxygen, 5-day biochemical oxygen demand, chemical oxygen demand, pH, suspended solids, electrical conductivity, total nitrogen, total phosphorus, and total organic carbon) at 22 different sites for the period of 2003-2011 were analyzed using multivariate statistical techniques (cluster analysis, principal component analysis and factor analysis). Hierarchical cluster analysis grouped whole river basin into three zones, i.e., relatively less polluted (LP), medium polluted (MP) and highly polluted (HP) based on similarity of water quality characteristics. The results of factor analysis/principal component analysis explained up to 83.0%, 81.7% and 82.7% of total variance in water quality data of LP, MP, and HP zones, respectively. The rotated components of PCA obtained from factor analysis indicate that the parameters responsible for water quality variations were mainly related to discharge and total pollution loads (non-point pollution source) in LP, MP and HP areas; organic and nutrient pollution in LP and HP zones; and temperature, DO and TN in LP zone. This study demonstrates the usefulness of multivariate statistical techniques for analysis and interpretation of multi-parameter, multi-location and multi-year data sets.