• 토지주택연구
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• 제2권4호
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• pp.355-365
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• 2011

Construction duration is very important as a factor which comprises three axises of construction management with quality and cost in construction project. In general project condition, construction duration is optimized while minimizing construction cost and securing required quality. However, in case of insufficient project time duration or delayed projects, project progress management is different from those of normal projects. These project areas need solutions to complete work within a given completion day. To time shortening the current duration of each typical floor of structural framework in apartment construction is investigated, and a basic time schedule planning for typical floor of structural framework in normal projects is planned. This study proposed 3 ways for time shortening of urgent project or insufficient construction duration project. Also, This study proposed detailed time shortening method and technical solution conditions while time is shortened.

• 대한공간정보학회지
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• 제13권2호
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• pp.29-37
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• 2005

우리나라 정부나 지방자치단체에서는 댐이나 도로건설로 편입되는 토지나 지장물에 대한 보상관련 지급여부 및 지급관련데이터를 문서형태 혹은 엑셀파일 형태로 보관/관리하여 왔다. 사업지구의 보상관련 데이터 관리는 대단위 관급공사의 경우 보상금 지급 및 입력 정보 확인 등의 업무에 문서와 인력에 의존함으로써 시간이나 경제적으로 비효율적으로 운영되고 있으며 보상 물건이 방대해짐에 따라 그 자료의 저장 및 보관도 큰 문제로 대두되게 되었다. 이에 문서로만 관리해 왔던 보상관련 위치정보와 속성정보를 연계한 지리정보시스템과 보상관련 업무처리 응용프로그램을 개발하여 보상자료에 대한 입력, 저장, 검색, 처리의 효율성을 도모하고자 한다. 본 연구에서는 도면(지적도면, 수치지형도 등)과 문서(토지대장 등)형태의 보상정보를 보다 효율적으로 관리할 수 있는 보상관련 데이터베이스를 바탕으로 한 수몰지구 보상관리 지리정보시스템을 개발하였다. 보상관리 지리정보시스템은 경계측량 필요지역, 실태조사 실시여부, 미 보상지역, 이중 보상지역 등의 검색 및 표시기능과 도면갱신 기능을 포함하고 있어 보상관리에 신속하고 신뢰성 있는 정보를 관리자와 민원인에게 제공하여 다양한 정보화 효과를 창출할 것으로 기대된다.

• 한국물환경학회지
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• 제36권5호
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• pp.405-422
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• 2020

Land use change by urbanization has significantly affected the hydrological process including the runoff characteristics. Due to this situation, it has been becoming more complicated to manage non-point source pollutions caused by rainfall. In order to effectively control non-point sources, it is necessary to identify the reduction efficiency of the various management method based on land use characteristics. Thus, the purpose of this study is to analyze the reduction efficiency of non-point source pollution management practices targeting three different watersheds with the different land use characteristics using the Soil and Water Assessment Tool (SWAT). To do this, the vulnerable subwatersheds to non-point source pollution occurrence within each watershed were selected based on the streamflow and water quality simulation results. Then, considering the land use, low impact development (LID) or best management practices (BMPs) were applied to the selected subwatersheds and the efficiency of each management was analyzed. As a result of analysis of the non-point source pollution reduction efficiency, when LID was applied to urban areas, the average reduction efficiencies of SS, NO₃-N, and TP were 5.92%, 4.62%, and 10.35%, respectively. When BMPs were applied to rural areas, the average reduction efficiencies of SS, TN and TP were 35.45%, 4.37%, and 10.16%, respectively. The results of this study can be used as a reference for determining appropriate management methods for non-point source pollution in urban, rural, and complex watersheds.

• Journal of Forest and Environmental Science
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• 제33권4호
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• pp.305-314
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• 2017

This study aimed to predict changes in forest area using a probability density function, in order to promote effective forest management in the area north of the civilian control line (known as the Minbuk area) in Korea. Time series analysis (2010 and 2016) of forest area using land cover maps and accessibility expressed by distance covariates (distance from buildings, roads, and civilian control line) was applied to a probability density function. In order to estimate the probability density function, mean and variance were calculated using three methods: area weight (AW), area rate weight (ARW), and sample area change rate weight (SRW). Forest area increases in regions with lower accessibility (i.e., greater distance) from buildings and roads, but no relationship with accessibility from the civilian control line was found. Estimation of forest area change using different distance covariates shows that SRW using distance from buildings provides the most accurate estimation, with around 0.98-fold difference from actual forest area change, and performs well in a Chi-Square test. Furthermore, estimation of forest area until 2028 using SRW and distance from buildings most closely replicates patterns of actual forest area changes, suggesting that estimation of future change could be possible using this method. The method allows investigation of the current status of land cover in the Minbuk area, as well as predictions of future changes in forest area that could be utilized in forest management planning and policymaking in the northern area.

• 한국측량학회지
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• 제25권1호
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• pp.31-37
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• 2007

국 공유지는 국가나 공공 단체가 소유하고 있는 땅으로써, 국가는 국민 모두의 재산인 국공유지 관리에 책임과 의무를 가지고 있다. 최근 정부에서는 국공유지의 관리를 위하여 노력을 기울이고 있으나, 현행 국공유지 관리방법은 국공유지의 특성을 반영하고 있지 못하고 있다. 본 연구에서는 국 공유지의 효율적이고 정확한 관리를 위해서는 정확한 실태조사가 필요하다 판단하여, 현재의 국공유지 실태조사 방법을 분석하여 문제점을 도출하였다. 실태조사를 정확하게 하지 못하면 측량의 미 실시를 초래할 수 있다는 것이며, 이는 곧 무단점유 사례의 누락이나 미 관리 토지의 발생으로 이어지게 되기 때문이다. 또한 현재의 육안에 의존한 실태조사와 지적측량 결과를 이용한 실태조사 방법을 비교하여 지적측량을 이용한 실태조사의 적합성을 판단하였고, 대상지역을 선정하여 점유현황 사례를 분석하였다. 그 결과 국공유지에 대한 전수 조사측량의 필요성을 확인할 수 있었으며, 지적측량 업무와의 연계를 통한 실시간 조사측량이 수행되어야 한다는 결론을 얻었다. 이는 결과적으로 국공유지의 효율적인 관리방안의 마련에 기여할 것으로 기대된다.

• 한국산학기술학회논문지
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• 제16권1호
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• pp.136-145
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• 2015

본 연구에서는 현행 국공유지 필지 관리에 관한 현황 및 문제점을 분석하고, 이를 기초로 국공유지 필지의 효율적 관리를 위한 개선방안을 제시하고자 하였다. 이를 위해 국공유지 관리의 현황과 문제점을 분석하였다. 분석된 문제점으로, 필지 관리 미흡에 따라 필지 수가 지속적으로 증가하고 있는 것으로 나타났다. 증가량은 2008년 기준으로 매년 평균적으로 128,520필이 증가하고 있는 것으로 분석되었다. 그리고 현황과 지적공부의 토지이용상황이 불일치하는 문제가 나타나고 있는 것으로 분석되었다. 이와 같은 문제점에 기초해 군소필지가 난립되고, 이는 필지 관련 통계자료 조사 산정시 오류가 포함되어 통계정보의 신뢰성에 문제가 있을 수 있는 것으로 나타났다. 연구에서는 이러한 문제점을 개선하기 위한 방안으로 합병을 통한 필지수 감소, 지적확정측량을 통한 지적정보 관리의 신뢰성 확보, 현황 중심의 국공유지 필지의 등록 관리를 제시하였다.

• 농업과학연구
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• 제31권2호
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• pp.161-174
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• 2004

This study is aimed at identifying China's land operating system in the great leap periods. the findings are as follows. For one thing, though the landownership in China was basically performed in public, a portion of private management was allowed. The more this kind of private management allowed, the more the life standard of farmers enhanced. For another thing, the conversion from agricultural cooperatives to people's commune happened swiftly, and the problems according to the conversion arose instantly, which made the operation system changed partially. The last, but not the least, even in the point of the rapid communistic movement, private management was locally accepted in the name of three self and one private management. Besides, as we can recognize from the case study of Daichai village, the operation of a large working group and a small working group was done in political context.

• 한국토양비료학회지
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• 제46권6호
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• pp.426-433
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• 2013

This study was aimed to classify soil desalination area for cultivation using NDVI (Normalized difference vegetation index) of high-resolution satellite image because the soil salinity affects the change of plant community in reclaimed lands. We measured the soil salinity and NDVI at 28 sites in the Saemangeum reclaimed land in June 2013. In halophyte and non-vegetation sites, no relation was found between NDVI and soil salinity. In glycophyte sites, however, we found that the soil salinity was below 0.1% and NDVI ranged from 0.11 to 0.57 which was greater than the other sites. So, we could distinguish the glycophyte sites from the halophyte sites and non-vegetation, and classify the area that soil salinty was below 0.1%. This technique could save the time and labor to measure the soil salinity in large area for agricultural utilization.

• 한국조경학회지
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• 제34권6호
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• pp.1-9
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• 2007

Land use types within a watershed closely are related with the water quality characteristics of receiving water bodies. Despite of a numerous studies suggesting a strong relationship between water quality and land use, there have been increasing concerns about the geographical variation and a lack of spatial integration in that relationship, which are essential to implementing these findings into land use planning and management. In the meantime, edges mediate the material flux between adjacent systems. This mediating effect of edges is strongly related to the complexity of their shapes. Land use activities within a watershed have a direct impact on the water quality of adjacent aquatic systems, and hydrological processes carry residuals from watershed into adjacent aquatic ecosystems through the edges. Therefore, the geometry of reservoirs theoretically affects the relationship between land uses in the watershed and the quality of receiving bodies of water. In this light, this study integrates the geo-spatial dimensions of land uses in the watershed using GIS and landscape indices in order to explore the relationship between land uses and water quality. Water quality characteristics, land uses and geometry of 133 randomly sampled reservoirs were correlated, based on buffer zones and types of reservoirs. The findings showed that land uses, particularly urban land uses, significantly affect water quality characteristics including BOD, COD, TN and TP, and geometry of reservoirs reduces the concentration of pollutant and nutrients in reservoirs. One of results indicates that the relationship between land use and water quality and effects of spatial dimension may vary with types of reservoirs and pollutants. These results suggest that lakeshore areas are important, particularly for TN reduction and call for a caution to land use activities nearby shoreline areas for sustaining better water quality.

• Journal of Forest and Environmental Science
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• 제39권3호
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• pp.167-179
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• 2023

The extent of change in the Land use/Land cover (LULC) of Okomu National Park (ONP) and fringe communities was evaluated. High resolution Landsat imagery was used to identify the major vegetation cover/land use systems and changes around the national park and fringe communities while field visits/ground truthing, involving the collection of coordinates of the locations was carried out to ascertain the various land cover/land use types identified on the images, and the extent of change over three-time series (2000, 2010 and 2020). The change detection was analyzed using area calculation, change detection by nature and normalized difference vegetation index (NDVI). The result of the classification and analysis of the LULC Change of ONP and fringe communities revealed an alarming rate of encroachment into the protected area. All the classification features analyzed had notable changes from 2000-2020. The forest, which was the dominant LULC feature in 2000, covering about 66.19% of the area reduced drastically to 36.12% in 2020. Agricultural land increased from 6.14% in 2000 to 34.06% in 2020 while vegetation (degraded land) increased from 27.18% in 2000 to 38.89% in 2020. The magnitude of the change in ONP and surroundings showed the forest lost -247.136 km² (50.01%) to other land cover classes with annual rate change of 10%, implying that 10% of forest land was lost annually in the area for 20 years. The NDVI classification values of 2020 indicate that the increase in medium (399.62 km² ) and secondary high (210.17 km² ) vegetation classes which drastically reduced the size of the high (38.07 km² ) vegetation class. Consequent disappearance of the high forests of Okomu is inevitable if this trend of exploitation is not checked. It is pertinent to explore other forest management strategies involving community participation.