• 한국수자원학회논문집
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• 제53권8호
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• pp.569-582
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• 2020

최근 우리나라는 도시화로 인해 수자원이용 환경이 급격한 변화를 맞이하였으며, 이로 인해 유출현상을 정량적으로 규명하여 가용수자원을 최적배분 하는데 어려움이 발생하고 있다. 이를 대비하기 위하여 국가물관리계획, 하천유역수자원관리계획 등이 제안되고 있으며, 효율적인 수자원 운영 계획 수립을 위해서는 정확하며 상세한 물수지 분석이 요구되고 있다. 그러나 기존에 수행되는 물수지 분석은 유역의 물순환 상황을 충분히 반영하지 못하며, 이러한 결과는 의사결정 측면에서 활용이 어려운 실정이다. 이러한 점에서 본 연구에서는 유역을 공간적으로 상세화하여 하천을 네트워크 형태로 재구성, 실적기반 자료를 반영한 물순환 모델을 개발하였으며, 하천을 중심으로 모니터링 지점의 유량정보가 준실시간으로 제공될 수 있는 체계를 마련하였다. 본 연구에서 개발된 물순환 모델은 기존 물수지 분석에서 나타나는 문제점을 개선하는데 목적이 있으며, 계측유역을 대상으로 모형의 적합성을 평가한 결과 특히 저유량 부분에서 기존 모형에 비해 크게 개선된 효과를 확인할 수 있었다. 본 연구에서 개발된 물순환 모델은 보다 정확한 자연유량 보정기법 적용과 유역 내 상세화된 유역네트워크를 통해 유량정보를 준실시간으로 제공함으로써 보다 현실적인 가뭄 모니터링 및 가뭄대책을 마련하기 위한 기초자료로 활용될 수 있을 것으로 기대된다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.721-727
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• 2002

Precipitation evapotranspiration and runoff are three key parameters of regional water balance. Problems exist in the traditional methods for calculating such factors , such as explaining of the geographic rationality of spatial interpolating methods and lacking of enough observation stations in many important area for bad natural conditions. With the development of modern spatial info-techniques, new efficient shifts arose for traditional studies. Guided by theories on energy flow and materials exchange within Soil-Atmosphere-Plant Continuant (SPAC), retrieval models of key hydrological parameters were established in the Yellow River basin using CMS-5 and FengYun-2 meteorological satellite data. Precipitation and evapotranspiration were then estimated: (1) Estimating tile amount of solar energy that is absorbed by the ground with surface reflectivity, which is measured in the visible wavelength band (VIS): (2) Assessing the partitioning of the absorbed energy between sensible and latent heat with the surface temperature, which was measured in the thermal infrared band (TIR), the latent heat representing the evapotranspiration of water; (3) Clouds are identified and cloud top levels are classified using both VIS and TIR data. Hereafter precipitation will be calculated pixel by pixel with retrieval model. Daily results are first obtained, which are then processed to decade, monthly and yearly products. Precipitation model has been has been and tested with ground truth data; meanwhile, the evapotranspiration result has been verified with Large Aperture Scintillometry (LAS) presented by Wageningen University of the Netherlands. Further studies may concentrate on the application of models, i.e., establish a hydrological model of the Yellow river basin to make the accurate estimation of river volume and even monitor the whole hydrological progress.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2004년도 학술발표회
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• pp.709-712
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• 2004

The development of a basin-wide runoff analysis model is to analysis monthly and daily hydrologic runoff components including surface runoff, subsurface runoff, return flow, etc. at key operation station in the targeted basin. h short-term water demand forecasting technology will be developed fatting into account the patterns of municipal, industrial and agricultural water uses. For the development and utilization of runoff analysis model, relevant basin information including historical precipitation and river water stage data, geophysical basin characteristics, and water intake and consumptions needs to be collected and stored into the hydrologic database of Integrated Real-time Water Information System. The well-known SSARR model was selected for the basis of continuous daily runoff model for forecasting short and long-term natural flows.

• 한국수자원학회논문집
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• 제53권spc1호
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• pp.827-832
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• 2020

본 연구에서는 천연 광천수 병입 회사인 에비앙의 유역관리 경험을 검토하였다. 에비앙은 전 세계로 수출하는 프랑스의 선도적 병입 광천수 기업으로, 장기간의 지속가능한 천연광천수 수원관리 경험이 많은 나라의 롤모델이 되고 있다. 프랑스 생수 회사의 경험에 따르면 환경 문제를 해결하기 위해 선제적이고 선진적인 아이디어를 끊임없이 제시하고 있다. 사업의 지속 가능성을 위해 기업은 효과적이고 계획된 자원 관리를 통해 환경성과를 개선하는 데 전념한다. 에비앙은 수자원을 개발·보존하고 지속 가능한 산업 기능에 대한 목표를 완수하기 위해 공동 소유 정신으로 지역 사회와 협력해 오고 있다. 이 파트너십은 천연광천수 자원 보호와 유역 내 지속가능한 농업 개발의 균형을 맞추는 것을 가장 중요한 목표로 삼고 있다.

• 한국잠사학회:학술대회논문집
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• 한국잠사학회 2003년도 International Symposium of Silkworm/Insect Biotechnology and Annual Meeting of Korea Society of Sericultural Science
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• pp.66-70
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• 2003

The first line of antioxidant defense against reactive oxygen species includes the enzymatic activity of the superoxide dismutase (SOD) that catalyzes the disproportionation of superoxide to hydrogen peroxide and water. The SOD mainly removes highly toxic $O_2$$^{[-10]}$ and also prevents $O_2$$^{[-10]}$ mediated reduction of iron and subsequent OH$^{[-10]}$ generation. Along with an interest in SOD as a first line of defense against damage mediated by the superoxide anion, the SOD1 enzyme has been subjected to investigation in the molecular and cellular level. (omitted)

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2019년도 학술발표회
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• pp.218-218
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• 2019

Jeju island has an area of $1,810km^2$ and is considered the largest island in South Korea. In Jeju Island the average annual precipitation is 1,957mm. About 54% of precipitation is estimated to be lost due to evapo-transpiration and direct runoff, and the remainder is recharged. Historically springs and puddles were the island's primary sources of water. However, after 1970 all sectors, including the urban and industrial sectors depended solely on groundwater as their water resource. As vast amount of water is being recharged the Island has many springs, especially near the coastlines. Historlcally, spring of Jeju Island formed village and make it possible to continue a life. Also it produces many values such as the spring related story, culture, tourism and ecosystems. Especially, the naturally rare phenomenon that about 900 springs appear over the whole area of Jeju Island makes it possible to call it as a natural heritage. As a result of this most springs have either been destroyed or been in the state of neglect. In some cases it has been observed that springs were preserved by nature, however majority of the cases saw springs losing their own nature as a result of abandonment. It was recorded that there were 911 springs in Jeju Island with most of them being distributed along the coast, which consequently increases their susceptibility to seawater intrusion. The objective of this study is therefore to analyze Eco-cultural and Engineering characteristics about springs in the island, highlighting its past utilization and reestablishing its potential as a source of spring.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2017년도 학술발표회
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• pp.195-195
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• 2017

The patterns of occurrence of typhoons in North Pacific region are constantly changing with the increase of temperature in sea surface and the occurrence of El Nino and La Nina and changes of their development caused by global warming. In addition, alterations of flow regimes caused by large-scale hydraulic construction projects in the past few years and changes in precipitation patterns caused by climate change have imposed increased stress on hydroecology while the indiscreet utilization of water resources has a negative environmental impact on the water flows in the natural rivers and streams and hydroecological structures. The purpose of this study is to explore the impact of altered hydrologic regime on stream and riparian ecosystems that are most vulnerable to climate variability and extremes such as typhoons.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2021년도 학술발표회
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• pp.138-138
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• 2021

Flash floods are one of the types of natural hazards which has severe consequences. Flash floods cause high mortality, about 5,000 deaths a year worldwide. Flash floods usually occur in mountainous areas in conditions where the soil is highly saturated and also when heavy rainfall happens in a short period of time. The magnitude of a flash flood depends on several natural and human factors, including: rainfall duration and intensity, antecedent soil moisture conditions, land cover, soil type, watershed characteristics, land use. Among these rainfall intensity and antecedent soil moisture, play the most important roles, respectively. Flash Flood Guidance is the amount of rainfall of a given duration over a small stream basin needed to create minor flooding (bank-full) conditions at the outlet of the stream basin. In this study, the Sejong University Rainfall-Runoff model (SURR model) was used to calculate soil moisture along with FFG in order to identify flash flood events for the Geum basin. The division of Geum river basin led to 177 head-water catchments, with an average of 38 km². the soil moisture of head-water catchments is considered the same as sub-basin. The study has measured the threshold of flash flood generation by GIUH method. Finally, the flash flood events were used for verification of FFG. The results of the validation of seven past independent events of flash flood events are very satisfying.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2019년도 학술발표회
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• pp.145-145
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• 2019

Groundwater and rainwater are the only sources of freshwater in small islands as many islands lack surface water sources. Groundwater occurring in the form of freshwater lens floating on denser seawater is highly dependent on natural recharge from rainfall. A sharp interface numerical model for regional and well scale modeling is selected to assess the sustainability of freshwater lens in the island of Tongatapu. In this study, 29 downscaled General Circulation Model(GCM) predictions are input to the recharge model based on water balance modelling. Three GCM predictions which represent wet, dry and medium conditions are selected for use in the groundwater flow model. Total freshwater volume and number of saltwater intruded wells are simulated under various climate scenarios with GCM predicted rainfall pattern, sea level rise and pumping. Simulations indicate that the sustainability of the freshwater lens is threatened by the frequent droughts which are predicted under all scenarios of recharge. The natural depletion of the lens during droughts and increase in water demands, leads to saltwater upconing under the pumping wells. Implementation of drought management measures is of utmost importance to ensure sustainability of freshwater lens in future.

• 물과 미래
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• 제26권3호
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• pp.103-111
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• 1993

자연하천의 수면곡선을 계산하기 위하여 표준축차계산법에 근거하 HEC-2모형을 이용하는 것이 일반적이다. 상류흐름에서 수면곡선의 계산은 일반적으로 하류에서 상류로 수행해 나간다. 그러나 이와 반대로 기준수면고가 상류지점에만 있는 경우, 하류쪽의 수면고들을 계산하고자 할 때는 많은 노력과 시간이 필요하게 된다. 이러한 경우에도 HEC-2를 이용하여 간편하게 상류에서 하류로 수면곡선을 계산하는 방법을 제안하였으며, 이 방법을 균일수로와 자연하천에 적용하여 타당성과 정밀도를 검토하였다.