• Journal of The Korean Society of Agricultural Engineers
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• v.63 no.2
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• pp.1-10
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• 2021

Agricultural reservoirs have a great influence on the water circulation in the watershed. It is necessary to evaluate the impact on water circulation by the agricultural reservoir. Therefore, in this study, we simulated the agricultural watershed through linkage of Hydrological Simulation Program Fortran (HSPF) and Module-based hydrologic Analysis for Agricultural watershed (MASA) and evaluated the contribution of the agricultural reservoir to water circulation by watershed water circulation index. As a result of simulating the Idong reservoir watershed through the HSPF-MASA linkage model, the model performance during the validation period was R2 0.74 upstream, 0.78 downstream, and 0.76 reservoir water level, respectively. To evaluate the contribution of agricultural reservoirs, three scenarios (baseline, present state, and present state without reservoir) were simulated, and the water balance differences for each scenario were analyzed. In the evaluation through the agricultural water circulation rate in the watershed, it was found that the water circulation rate increased by 1.1%, and the direct flow rate decreased by 13.6 mm due to the agricultural reservoir. In the evaluation through the Budyko curve, the evaporation index increased by 0.01. Agricultural reservoirs reduce direct runoff and increase evapotranspiration, which has a positive effect on the water circulation.

• Korean Journal of Soil Science and Fertilizer
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• v.43 no.6
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• pp.828-836
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• 2010

This study was conducted to evaluate soil erosion risk with a standard unit watershed in the upper Han river basin using the spatial soil erosion map according to the change of landuse. The study area is 14,577 $km^2$, which consists of 10 subbasins, 107 standard unit watersheds. Total annual soil loss and soil loss per area estimated were $895{\times}10^4\;Mg\;yr^{-1}$ and 6.1 Mg $ha^{-1}\;yr^{-1}$, respectively. A result of analysis with a subbasin as a unit showed that annual soil losses and soil loss per area in Namhan river basins was more than in Bukhan river ones. Predicted annual soil loss according to the landuse ranked as Forest & Grassland > Upland ${\gg}$ Urban & Fallow area > Paddy field > Orchard. Upland area covered 6.2% of the study area, but the contribution of total annul soil loss was 40.6% and that of Forest & Grassland was 44.2%. As a evaluation of soil erosion risk using the spatial soil erosion map, we could precisely conformed the potential hazardous region of soil erosion in each unit watersheds. The ratio of regions, graded as higher "Moderate" for annual soil loss, were respectively 8.7%, 7.9% and 7.8% in 1001, 1002 and 1003 subbasins in Namhan river basin. Most landuse of these area was upland, and these area is necessary to establish soil conservation practices to reduce soil erosion based on the field observation.

• Journal of the Korean housing association
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• v.16 no.4
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• pp.29-35
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• 2005

The present study was compared and discussed with focus on the evaluation for the Importance Level of Design Elements and the Case Study Designing with respect to Environmental-Friendly Apartment Housing. It was examined that there were some differences between the result of Importance Level and the suggested details from Case Study. From the result of Importance Level, evaluation was highly given on the planned principles regarding effective utilization of landuse, ecological principle and reflection of varities, while from the result of Case Study on the planned principles regarding health of residents and amenity. Accordingly the present development method and the fundamental understanding on Environmental -Fiendly Apartment housing should be changed on the basis of the results as above.

• Journal of Environmental Impact Assessment
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• v.4 no.3
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• pp.63-71
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• 1995

This study analyzes the problems of environmental laws, development planning laws, Metropolitan Area Development Planning (MADP), and the level of environmental pollution at Asan-bay metropolitan area, where MADP will be realized in the near future. In order to prevent environmental pollution by the implementation of MADP, the Environmental Impact Assessment (EIA) Act and EIA systems in Korea should be revised so as to reflect the followings. First, the impact of national landuse planning changes on the environment should be considered at the beginning of the EIA procedures. Second, the overlapping and greater impact of many projects upon surrounding metropolitan areas should be simultaneously evaluated, though each project is the subject of EIA, and the environmental pollution protection and abatement alternatives must be made in accordance with the above impact of the projects. Thirdly, total effluent regulation of water pollution, air pollution and solid wastes should be enforced based on the self-purification of the metropolitan area environment.

• Journal of the Korean Institute of Rural Architecture
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• v.1 no.2
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• pp.109-117
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• 1999

The purpose of the study is to evaluate the Rural Settlement Development(RSD) driven by government in historical view, and its effects on the facilities and houses of rural village in the country. Through the study, we have come to the results that the major concerns of the RSD projects since 1950s has been transferred to as following. First, the reformation of inter-facility; dressing room, kitchen, bath-house, etc of rural houses, from that of outer facility; roof, fence and etc. Secondly, the substantial objects of the projects of village settlement improvement have been changed from partial reformation of individual houses, public facilities, etc early, to comprehensive reformation by master plan for village settlement recently. Lastly, those have been established that the process of planning village settlement available to carry out landuse division and the various program for village improvement, based on its inherent circumstances.

• Journal of Environmental Science International
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• v.12 no.12
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• pp.1197-1206
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• 2003

As growing importance and concern of waterfront, we have tried to study its landscape, accessibility, landuse and so on as well as its environmentally sound and sustainable development. In fact we had been under the false thought that it always gaves what we wanted, and it was neglected in its economic value. This paper/looks at one alternative, the non-market value generated by management of waterfront as public resources. We consider the question : how much are people willing to pay to improve, how much are people want to improve\ulcorner The contigent valuation method was implemented during Sep. 9 to 14 in 3 beaches ; haeundae, Gwanganri, Songjeong. They are representative waterfronts which have been widely known and visited. We find out that households are willing to pay about 12,000-16,000 den per year for improving nature elements and inviting more valuable functions about 3 beaches. Especially Ive pay attention to difference between cognitive and comprehensive satisfaction 3 beaches and their substructural factors satisfaction such as natural environment, public facilities, recreational facilities and etc.

• Journal of Environmental Impact Assessment
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• v.20 no.1
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• pp.71-78
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• 2011

This paper aims to assessing impact of reduction of non-point source pollution in the Bokha Stream watershed. The BASINS/HSPF model was calibrated and verified for water flow and water qualities using Total Maximum Daily Load 8days data from 2006 to 2007. Accuracy of the BASINS/HSPF models in simulating hydrology and water quality was compared and there were somewhat differences of statistical results, but water flow and water quality were simulated in good conditions over the study period. The applicability of models was tested to evaluate non-point source control scenarios to response hydrology and water quality in the Bokha stream using various measures which include BMPs approach and change of landuse. The evaluation of reduction of non-point source pollution was developed using load-duration curve. Despite strong reduction of non-point source, there are not satiated target quality at low flow season.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.360-364
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• 2006

The physical characteristics of suspended solid in urban watersheds are estimated and are described the accumulation processes on the urban surface. And build up the accumulation model which has two parameters and three constants. Two parameters are $p_0\;and\;p_{max'}$, and three constants are landuse, clean and traffic constant. Suggested model is applied three industry watershed which has variable area. And simulated results are compared with observed data. The model estimates the real phenomenon and the results are pretty good. The simulated accumulation mass are 1.20, 0.96 and $2.88g/m^2$. The differences of simulation and observation data are about 30%.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.1002-1006
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• 2009

본 연구에서는 물리학적인 모형에서 사용되고 있는 토지이용도를 이용하여 공간적인 해상도의 차이에 따른 유출량의 변화를 비교해 보았다. 현재 수문모형에서 주로 사용되고 있는 토지이용도는 국가 수자원관리종합정보 시스템 (WAMIS)에서 제공하고 있는 위성영상을 기반으로 한 토지이용자료이다. 이 토지이용 자료는 공간적으로 30 m ${\times}$ 30 m의 해상도를 갖고 있어 소유역에 대해 세밀한 분석을 위해서는 보다 세밀한 토지이용 자료와의 비교 검토가 필요하다. 이에 본 연구에서는 WAMIS에서 제공하고 있는 2000년도 토지이용도와 개별적으로 제작한 정밀한 토지이용도를 이용하여 학의천 유역의 유출량을 비교해 보았다. 정밀한 토지이용도는 2000년에 작성된 수치지도와 1 m ${\times}$ 1 m의 공간해상도를 갖는 Ikonos 위성영상을 바탕으로 제작되었으며, 유출량 모의는 토지이용도를 반영할 수 있는 HSPF (Hydrological Simulation Program - Fortran) 모형을 이용하였다. 본 연구에서 HSPF 모형을 통하여 모의한 유출량에 있어서는 토지이용의 해상도의 따른 차이는 거의 발견할 수 없었다.

• Journal of Korean Society of Rural Planning
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• v.2 no.1
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• pp.49-56
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• 1996

This study examines the development and management of the Herb Island in Japan, and explores influences of the herb garden on a rural community. The result suggested that the development of a herb garden can make a major impact on a rural community's econmoic stability and growth, and low-input cultivation of herbs serves to the ecosystem and soil conservation. In order to foster the herb industry in Korea, three aspcets should be considered. These are as follows. 1. Selection of suitable kinds of herbs and sites for Korean natural environment,and planning for proper landuse should be carried out first. 2. Proper policies for a herb garden to help local economy should be established. 3. Development of programs and experts on environmental education should be included in planning herb gardens in order to contribute to natural environment preservation.