• Title, Summary, Keyword: 자원량

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Analysis on Survey, Exploration and Development Policy and Technology of China : Focused on Shale Gas Resources (셰일가스 자원을 중심으로 한 중국의 에너지·광물자원 조사·탐사·개발 기술 정책분석)

  • Lee, Jae-Wook;Kim, Seong-Yong;Ahn, Eun-Young;Park, Jung-Kyu
    • Economic and Environmental Geology
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    • v.47 no.3
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    • pp.291-302
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    • 2014
  • The Chinese government and its agencies were trying in order to solve the unstability of resource supply and demand. Ministry of Land and Resources of China(MLR) carried out a lot of national-level policy and planning for estimating the domestic mineral and energy resources potential and recoverable reserves, as the Chinese land and resources survey plan(1999~2010), the Chinese mineral resource survey and exploration plan(2008~2020), announcement for shale gas industry policies of China, the Chinese shale gas resources evaluation and selection project for its development priority areas(2012), and the plan for Chinese shale gas development(2011~2015). The two large sedimentary basins of Chinese shale gas reserves are Sichuan and Tarim basins with excellent potential, accounting for majority of the estimated national reserves. Recoverable gas-bearing shale of China was surveyed to be widespread. The volume of recoverable shale gas reservoirs in China has been estimated to be around 31 trillion cubic meters(1,115 trillion cubic feet). China is one of only three countries with the US and Canada to produce shale gas in commercial quantities. China is concentrating on technology development to enhance commercial production of shale gas, and on survey and exploration activities to increase its recoverable reserves. The trends related to shale gas development and R&D activities in China to respond to changes in international oil market should be actively monitored based on analysis of Chinese policies and technology.

Evaluation of Wind Turbine Efficiency of Haengwon Wind Farm in Jeju Island based on Korean Wind Map (풍력-기상자원지도에 기반한 제주 행원 풍력발전단지 효율성 평가)

  • Byon, Jae-Young;Kang, Mi-Sun;Jung, Hyun-Sook
    • Journal of the Korean earth science society
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    • v.34 no.7
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    • pp.633-644
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    • 2013
  • This study evaluates wind farm efficiency at Haengwon in Jeju Island. The actual energy production at Haengwon wind farm is compared with the estimated energy production based on Korean wind map which is developed at the National Institute of Meteorological Research/KMA. The validation of wind map at Gujwa located near the Haengwon wind farm shows that the wind speed is overestimated. The diurnal variation of wind speed shows a maximum value in the afternoon due to the effect of sea-land breeze. The ratio of the actual energy production at Haengwon wind farm and the estimated energy production based on the Korean wind map is 24.8%, while the distribution of energy frequency is similar each other. The difference of energy production is caused by mechanical error of the turbine and the overestimation of the simulated wind map. This study will contribute to the repowering of turbines for improving the efficiency of wind farm in the future.

Stock Density and Larval Occurrence of Penshell Atrina pectinata in Deukryang Bay (득량만에서 키조개 Atrina pectinata 자원과 유생 출현 분포)

  • Kim, Chul-Won;Kwon, Seung-Bai;Hur, Sung-Bum
    • Journal of Aquaculture
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    • v.20 no.4
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    • pp.232-238
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    • 2007
  • The distribution of stock density and larvae of Atrina pectinata was examined in Deukryang Bay. Sampling of adult stock was seasonally conducted from 29 stations in the bay in May, August, and November 1995 and February 1996. And the larvae were sampled with interval of 3 to 7 days from 12 stations from July to October 1996. Seasonal abundance of the adult in number and in biomass were the highest in August ($18\;inds./m^2$) and in November ($2,790\;g/m^2$), respectively, at G1 station located in the most inner bay. In frequency distribution of shell height, the mode in May appeared in 10-14 cm group with 62%, and that of the other seasons in $15{\sim}19\;cm$ group. The larvae were also distributed mainly at G1 as the adult were. The larval abundance showed a periodical cycle which seemed to be related to lunar cycle. The highest abundance of the larvae occurred on August 16 with $8\;inds./m^3$, and then decreased continuously. With regard to frequency distribution of larval shell height, the larvae less than $200\;{\mu}m$ occurred from July to October. And the mode in July appeared in small size group ($200{\sim}249\;{\mu}m$) with 38%. These results mean that A. pectinata spawned from July to October, mainly middle July to middle August. The larval distribution showed the same geographical tendency to adult distribution. Both the adult and the larvae mainly distributed in the most inner bay and west area of Deukryang island, where was shallower, warmer, and higher primary productivity than the entrance area of the bay and east area of the island. However, larval abundance of A. pectinata in this study was so low compared to adult biomass. The reason for this unusual phenomenon should be understood with the detail research in future.

도수로터널 굴착에 따른 지하수 유출

  • 이병대;함세영;조병욱;이인호;이춘오;성익환
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • pp.67-70
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    • 2001
  • 터널 굴착에 따른 연구지역내 지하수체의 거동 특성을 파악하기 위하여 터널 굴착시 그라우팅 이전의 초기 유출량과 초기 그라우팅 이후의 구간별 유출량을 측정하였고 단열구조와 비교, 분석하였다. 초기 유출량은 120,990 m$^3$/day이며, 초기 유출이 심했던 구간은 크게 6개 구간으로 세분할 수 있다. 초기 그라우팅 후 지하수 유출이 심했던 구간 역시, 그라우팅 이전과 마찬가지로 6개 구간으로 세분할 수 있다. 그라우팅 전, 후의 유출량을 비교해 보면 그라우팅후의 유출량은 42,844m$^3$/day으로, 그라우팅 전에 비해 많이 감소되었다. 터널 굴착시 터널내로 유출되는 지하수의 대부분은 터널과 직교 혹은 사교하여 관통하고 있는 단층 및 단층 파쇄대와 연장성이 양호한 절리면들을 따라서 유동되고 있다. 터널내의 지하수 유출에 영향을 미치는 단열들은 대체로 4조의 불연속면군으로 분류 할 수 있는데, 주 분포방향은 크게 TSet 1 : N60-85$^{\circ}$W, TSet 3 : N40-50$^{\circ}$E, TSet 3 : N10-20$^{\circ}$E, TSet 4 : N70-80$^{\circ}$E이다.

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3D Modeling For Resources Estimation of Ilmenite Deposits in Jikjeon-Ri, Hadong Korea (하동군 북천면 직전리에서 산출되는 티탄철석광상의 자원량 평가를 위한 광체 3D 모델링)

  • Kwak, Ji Young;Choi, Jin Beom;Cho, Hyen Goo
    • Journal of the Mineralogical Society of Korea
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    • v.26 no.4
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    • pp.285-297
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    • 2013
  • Ilmenite deposits are developed along the Precambrian intercumulated anorthosite body in Jikjeon-Ri, Bukcheon-Myeon, Hadong, Korea. Both detailed geological survey and drilling prospecting data for seven boreholes can be used to do resource estimation with GOCAD S/W. 3D modeling using geostatistics is applied to predict the shape and size of Ti ore bodies. As a result, 5 Ti ore veins occurred along N-S direction and average grade of Ti and ilmenite resources are calculated as 2.98 wt% Ti and 7,494,303 metric tons ilmenite ore reserves (Ti 223,330 t). This 3D modeling will be applied to the whole ilmenite deposits in Hadong-Sancheong area to predict the exact distribution and resources estimations of Ti ores.

Dead Zone Correction for Abundance Estimation of Demersal Fish by Acoustic Method (저서어자원량의 음향추정에 있어서 해저 데드존의 보정에 관한 연구)

  • 황두진
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.36 no.3
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    • pp.202-209
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    • 2000
  • In order to estimate demersal fishes using acoustic echo sounders and echo integrators, we consider several problems that are accurate bottom detection, optimum bottom offset and dead zone. The dead zone where no fish detection are summed distance resolution by the half pulse length of transmitted pulse and beam angle above the seabed. This paper has considered the dead-zone correction method to be technically correct for survey of demersal fishes. A comparison between near-bottom SV profiles acquired in Funka Bay, Hokkaido, of Japan, the East China Sea and the Yellow Sea, of Korea, with before and after the bottom correction, shows that the SV obtained with after the bottom correction is 2∼3dB higher than before the bottom correction in Funka Bay, and 17dB higher in East China Sea, too.

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A Study on Fluctuations in Biomass of Small Yellow Croaker, Pseudosciaena polyactis, off Korea (한국근해 참조기의 자원량 변동에 관한 연구)

  • ZHANG Chang-Ik;KIM Yong-Mun;YOO Sin-Jae;KIM Chong-Kwan;AHN Soon-Mo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.25 no.1
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    • pp.37-44
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    • 1992
  • Annual biomasses of small yellow croaker, Pseudosciaena polyactis, were estimated by biomass-based cohort analysis (Zhang, 1987) , using data on annual catch in weight at age for 1970-88 in Korean waters. Annual biomass of croaker was highest in 1974 with about 100,000 mt, declining to a level of 20,000-30,000 mt after 1981. Adult biomass also showed a peak in 1974 with about 50,000 mt. Afterwards, however, it continuously dropped. According to the estimates of biomass at age obtained from this analysis, the age composition of small yellow croaker in the 1980's differed greatly from that in the 1970's. The proportions of older croakers (>5 years) were very low in the 1980's and even the biomasses of young croakers (1-4 years) were at a very low level in the 1980's. Year classes of 1968, 1972 and 1978 appeared to be relatively dominant. The mean value of instantaneous fishing mortality (F) in the 1980's was twice that of the 1970's. Recruitment of croaker exhibited an unusally linear relationship with adult stock biomass.

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Solidification of municipal solid waste incineration fly ash by hauyne clinker (Hauyne 클링커에 의한 생활폐기물 소각 비산재의 고화 특성)

  • Han, Gi-Chun;You, Kwang-Suk;Um, Nam-Il;Cho, Kye-Hong;Cho, Hee-Chan;Ahn, Ji-Whan
    • Proceedings of the Korean Institute of Resources Recycling Conference
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    • pp.355-359
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    • 2005
  • 본 연구에서는 OPC 및 hauyne 클링커의 비산재에 대한 고화특성을 검토하였다. 비산재에 대해 OPC 및 OPC에 hauyne 클링커를 20%까지 대체하였을 때의 압축강도, 길이변화율, 중금속 용출량 등을 조사하였다. 결과로서, hauyne 클링커의 첨가량에 따라 고화체의 압축 강도가 증가하였다. hauyne 클링커의 첨가량은 10%내외가 적합하였으며, 그 이상에서는 길이변화율이 증가하며 팽창하였다. 고화체의 중금속 용출시험결과 모든 배합조건에서 환경기준치이하의 값을 나타내었다.

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Classification and Example of Assessment Methodologies for Shale Resources (셰일자원량 평가기법의 분류 및 적용사례)

  • Lee, Kyungbook;Son, Byeong-Kook;Lee, Won Suk;Lee, Hyun Suk;Choi, Jiyoung;Hong, Sung Kyung
    • Journal of the Korean Society of Mineral and Energy Resources Engineers
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    • v.54 no.2
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    • pp.185-200
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    • 2017
  • This paper compares assessment methodologies for shale resources to understand the amount of shale resources, which are estimated from various organizations. The ARI and BGS methods, which are a typical bottom-up approach, estimate shale gas and oil resources by a volumetric method using fundamental geology and engineering data. However, it introduces subjective success factors and recovery factor to convert the amount of originally in-place into risked technically recoverable resources. On the other hand, the USGS method adapts a top-down approach. Rather than focusing on the basic data, production-based data such as drainage area and estimated ultimate recovery are utilized to directly assess productivity of concerned shale resources. This method uses analogue data from US database when available production data are limited. Therefore, we have to figure out features in the methodologies and to choose an appropriate assessment method according to given data.

A Study on Material Requirement Planning by Integrating Schedule and Cost (비용$\cdot$일정 통합관리를 이용한 자원소요계획에 관한 연구)

  • Song Young-Woong;Choi Yoon-Ki
    • Korean Journal of Construction Engineering and Management
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    • v.4 no.1
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    • pp.106-113
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    • 2003
  • In this study, The matrix method was used with common category concept according to the construction project control system. For the purpose of systematic resource management planning, it should be established on accomplished EVM data for clearing the ordering point according to the attribute procurement analysis. Resource management was presented by connecting the material requirement calculation method and the attribute of procurement method based on the EVM, suggested through analyzing process-data modeling using integrated schedule, cost and material.