• Title/Summary/Keyword: Optimal reclamation method

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A Study on Rational Alternative Comparison of Prior Review on Environmental Conditions for Basic Plan of Public Waters Reclamation (공유수면매립 기본계획 사전환경성검토의 합리적인 대안비교에 관한 연구)

  • Maeng, Jun-Ho;Cho, Kwang-Woo;Byon, Seong-Soo
    • Journal of Environmental Impact Assessment
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    • v.19 no.6
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    • pp.563-571
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    • 2010
  • In carrying out the prior review on environmental conditions for basic plan of public waters reclamation, the important item is review on conditions of location on prearranged reclaimed land. In this study, environmental assessment which needs careful consideration in the first stage of selecting location is presented by analyzing environmental impact assessment on public waters reclamation projects for about 10 years. The assessment index for alternative comparison is divided into two parts according to importance level. What is most important in alternative comparison is the comparison on direct influence due to reclamation. In other words, it figures out damaged extent of natural shoreline as well as intertidal and infralittoral zones. Comparing influence extent due to reclamation through the 1st comparison on this is regarded as to be important. In case there is no significant difference by alternatives through the 1st assessment, the 2nd assessment should be carried out. In the 2nd assessment indexes are damaged quantity of benthic organism, change in seawater current, erosion, accumulation and exchangeable rate of seawater. The plan for selecting optimal location which minimizes environmental influence in establishing public waters reclamation plan is demonstrated through model cases. For this, 3 districts which have similar environment and scale are selected, and then comparison on location alternative is made through environmental assessment index. In addition, the comparison on 3 arrangement alternatives are conducted, targeting certain areas. It is thought that carrying out comparison review on respective areas in the same cities and counties, not merely comparing arrangement plan by selecting 1 targeting area in advance, is the most appropriate. Besides, selection of arrangement plan considering environment, which minimizes damage of natural shoreline and influence due to change of seawater current is required in alternative comparison on arrangement plan as well. In case of the prior review on environmental conditions though alternative comparison method presented in this study is carried out, it is safely said that the influence on ocean environment due to public waters reclamation can be minimized.

Reclamation of Closed Non-Sanitary Landfills by Sorting Transfer Control (선별이적처리를 통한 사용종료 비위생매립지 정비방안 연구)

  • Kim, Dongoh;Kim, Taekyoung;Kim, Mihwa;Kim, Moonil
    • Journal of the Korean GEO-environmental Society
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    • v.10 no.1
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    • pp.15-23
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    • 2009
  • The aim of this study was an evaluation of closed non-sanitary landfill's stabilization degree and a determination of its an optimal reclamation method. In order to evaluate the stabilization degree, physical compositions of landfill wastes in 21 closed non-sanitary landfills were analyzed. There were 4 major items such as cover soils, organics, combustibles and incombustibles. With respect to the results of physical compositions, it was determined that the waste in 9 sampling sites of closed non-sanitary landfills after 10years of the relief time was not fully stabilized. The closed non-sanitary landfills must be reclaimed as soon as possible. The main material in closed non-sanitary landfills was cover soils and the highest content was 89.96%. Otherwise, the contents in sanitary landfills was small and 9.89~11.12%. Therefore, it was evaluated that the recovered soil by sorting transfer treatment could be reused as on-site cover soils of the reclamating non-sanitary landfills and/or constructing materials.

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Selection of the Optimal Transplanting Method and Time for Restoration of Zostera marina Habitats (잘피(Zostera marina)서식지 복원을 위한 최적 이식방법 및 시기 선정에 관한 연구)

  • Park, Jung-Im;Kim, Young-Kyun;Park, Sang-Rul;Kim, Jong-Hyeob;Kim, Young-Sang;Kim, Jeong-Bae;Lee, Pil-Yong;Kang, Chang-Keun;Lee, Kun-Seop
    • ALGAE
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    • v.20 no.4
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    • pp.379-388
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    • 2005
  • Seagrass bed is an important component in coastal and estuarine ecosystems, providing food and shelter to a wide variety of fauna. Recently, seagrass coverage has declined significantly due to anthropogenic influences such as reclamation, dredging, and eutrophication and consequently, necessity of seagrass habitat restoration is rising. Transplantation experiments with Zostera marina using TERFS, staple method, and shell method have been conducted at Dadae Bay, Kosung Bay and Jindong Bay on the south coast of Korea to select an optimal transplanting method for restoration of Z. marina habitat. Three experimental sites located at the vicinity of natural Z. marina beds with an average water depth of about 4m. Z. marina plants, which were collected from donor bed in Koje Bay were also transplanted at 7 different time from October 2003 to July 2004 to find appropriate transplanting time. Density of Z. marina was monitored monthly at both transplanted areas and natural beds. Transplantation using the staple method showed the highest survival rate of transplant. Shell method was also an effective transplanting method at muddy areas in Kosung Bay and Jindong Bay, but not suitable at sandy areas in Dadae Bay. These results suggest that sediment composition of transplanting areas should be considered for the selection of the optimal transplanting method. Z. marina transplanted during fall usually showed the highest survival rate, while most Z. marina plants transplanted in summer died due to high lethal temperature during this period.

A Study on the Distribution of Compensation for Damages of Common Property Fisheries by Alternative Cost Approach of Utilizing Fishing Ground (어장이용의 기회비용접근법에 의한 공동소유 어업권의 손실보상금 분배연구 - A어촌계의 미역양식어업권의 취소보상액 분배사례를 중심으로 -)

  • 김기수;강용주
    • The Journal of Fisheries Business Administration
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    • v.34 no.1
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    • pp.9-30
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    • 2003
  • This paper tries to suggest a rational proposal for the distribution of compensation of common property fisheries damages caused by a large scale coastal reclamation. For the purpose the paper introduces the approach of alternative cost of the use of fishing ground. The background of the paper is the legal conflict between tenants and non-tenants, both of whom are common owners of seaweed cultivation ground, in the distribution of compensation for damages. In principal, so far as the seaweed cultivation right is a common property of the fishing association, the compensation is also a common property of it. Therefore the distribution method of the compensation entirely depends on the decision of the association. But in case that the numbers of non-tenants is larger than those of tenants, the distribution of the compensation is usually unfavorable to the tenants even though the latter is the key contributor to the realization of present value of the common property. The paper aims to show an appropriate distribution method based on the economic principle of optimal distribution. In others words, the value added to the economic value of alternative use of the fishing ground should be distributed to the tenants. the value amount of alternative use of the fishing ground should be equally distributed to the members of the association.

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A Study on Utilization Plan of Nangido Landfill Using Digital Elevation Model (수치표고모형을 이용한 난지도 쓰레기 매립장의 이용계획에 관한 연구)

  • 이재기;조재호;이현직;이인성
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.11 no.1
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    • pp.19-27
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    • 1993
  • For the design of a large-scale landfill, the future utilization plan of the landfill ought to precede based on the analysis of existing facility. Analysis for the present condition of reclamation must include accurate assesment of volume and other consideration such as urban scenery. In this study an optimum data interpolation scheme area/volume determination method based on the classification of topography were combined for the correct assessment of sweeping volume. Combined model was compared with the real data of Digital Elevation Model constructed by aero photography. The new model aims at providing basic information for the design and utilization of a new landfill. A a result of this study, we made an algorithm to perform the classification of the topography in the area of interest objectively. In addition, we decided optimal data interpolation scheme and area/volume calculation method for given topography. Finally, we applied the developed methodology to Nangido Landfill to assess current landfill situation and potential capacity when landfilling is resumed.

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Study on Recovery of Au from Flotation Tailing of Gold (금(金) 浮選(부선) 광미(鑛尾)로부터 금(金)의 회수(回收)에 관한 연구(硏究))

  • Shin, Seung-Han;Kang, Hyun-Ho;Hong, Jong-Won;Lee, Jin-Soo;Park, Je-Hyun;Han, Oh-Hyung
    • Resources Recycling
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    • v.19 no.6
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    • pp.61-69
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    • 2010
  • S.M.C (DSME), only operating gold mine in Korea, is processing about 160 ton/day to recover gold and more than 150 ton/day of tailing is produced. Some portion of the tailings are used as a filler material after drying, but most of them are stored on the tailing dam. As a result of chemical analysis by a fire assay method, it contained Au 1.5~2.0 g/ton and 225~300 g per day of gold is getting discarded. It is urgent to develop a technology to recover and reutilize Au. In the present study, flotation tests were carried out to recovery gold for the tailings. Test results show that products with gold grade 21.31 g/ton(Au grade) and 62.73% (Au recovery) were obtained under the optimal conditions including KAX addition rate 97.2 g/ton, frother AF 65 (0.248 l/ton) and depressant sodium silicate (4 kg/ton), it's possible to recover one of the most valuable metal Au, by re-feeding to rougher flotation.

Detection of inflow permeable zones using fluid conductivity logging in coastal aquifer (공내수 치환기법을 이용한 연안지역 대수층의 수리특성 평가)

  • Hwang Seho;Park Yunsung;Shim Jehyun;Park Kwon Gp;Choi Sun Young;Lee Sang Kyu
    • 한국지구물리탐사학회:학술대회논문집
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    • 2005.09a
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    • pp.83-92
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    • 2005
  • Fluid conductivity logging has been applied in the boreholes to identify the permeable fi:actures and estimate the origin of saline groundwater in coast area. Fluid replacement technique measures the fluid electrical conductivity with depth at different times in a well after the borehole is first washed out with different water by passing a tube to the borehole bottom. Then formation water flows into the borehole through aquifer such as permeable fractures or porous formation during ambient or pumping condition. Measured conductivity profiles with times therefore indicate the locations of permeable zone or fractures within the open hole or the fully slotted casing hole. As a result of fluid conductivity logging for three boreholes in the study area, it is interpreted that saline groundwater is caused by seawater intrusion through fractured rock, although the effect by land reclamation partially remains. We are planning the quantitative analysis to estimate the hydraulic characteristics using fluid replacement technique, and this approach might be usefully utilized for assessing the characteristics of seawater intrusion, the design of optimal pumping, and estimating the hydraulic properties in coastal aquifer.

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Separation Characteristic and Recycling of Excavated Materials Containing Waste (폐기물혼입굴착물의 선별특성과 재활용성 평가)

  • Lee, Suyoung;Kim, Kyuyeon;Jeon, Taewan;Shin, Sunkyoung
    • Journal of the Korea Organic Resources Recycling Association
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    • v.27 no.2
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    • pp.5-12
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    • 2019
  • The study is carried out to survey the proper management and to propose an eco - friendly separation system through efficient screening and resource recovery of excavated materials containing waste from various excavating fields such as reconstruction of landfill sites for reuse, reclamation of unsanitary landfill and residential land development of waste dumping sites. The current status and screening process and analytical characteristics of the excavated materials containing waste were reviewed. Through the analysis of the samples such as separated combustibles, recyclable soils and residues collected from the on-site visits we were able to understand the characteristics of separated materials and excavated materials containing waste such as calorific value, elementary composition, TOC, foreign material content and LOI. It has been found that elimination of the moisture of excavations, removal of attached soil from the surfaces of the excavated combustibles and the quantitative supply method of the input devices are the main operating factors as essential factors for the optimal separation of excavated materials containing waste. For efficient management and recycling of excavated materials containing, it is necessary to set criteria of ash content in separated combustibles and criteria organic matter content in separated soils.