• Journal of The Korean Society of Agricultural Engineers
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• v.58 no.6
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• pp.23-30
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• 2016

Soil loss is an accompanying phenomenon of hydrologic cycle in watersheds. Both rainfall drops and runoff lead to soil particle detachment, the detached soil particles are transported into streams by runoff. Here, a sediment-laden water problem can be issued if soil particles are severely detached and transported into stream in the watershed. There is a need to estimate or simulate soil erosion in watersheds so that an adequate plan to manage soil erosion can be established. Universal Soil Loss Equation (USLE), therefore, was developed and modified by many researchers for their watersheds, moreover the simple model, USLE, has been employed in many hydrologic models for soil erosion simulations. While the USLE has been applied even in South-Korea, the model is often regarded as being limited in applications for the watersheds in South-Korea since monthly conditions against soil erosion on soil surface are not capable to represent. Thus, the monthly USLE factors against soil erosion, soil erodibility and crop management factors, were established for four major watersheds, which are Daecheong-dam, Soyang-dam, Juam-dam, and Imha-dam watersheds. The monthly factors were established by recent fifteen years from 2000 to 2015. Five crops were selected for the monthly crop management factor establishments. Soil loss estimations with the modified factors were compared to conventional approach that is average annual estimations. The differences ranged from 9.3 % (Juam-dam watershed) to 28.1 % (Daecheong-dam watershed), since the conventional approaches were not capable of seasonally and regionally different conditions.

• Journal of Korean Society of Environmental Engineers
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• v.28 no.1
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• pp.74-80
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• 2006

Benefit transfer is a method, which obtains an estimate for the economic valuation of non-marketed commodities at a given site through the analysis of studies that have been previously carried out to value similar commodities at a different location. The objective of this study was to estimate benefit transfer values for the construction of the integrated sewerage system in the catchment area of dams in Korea. For pooled data analysis, five models were suggested in this study. Among five models, model 2 showed only 6 to 7% errors when the willingness-to-pay(WTP) predicted in the policy-site, Dam Soyang was compared with that estimated using contingent valuation method(CVM) in the study-sites, Dams Namgang, Hapcheon, and Daecheong. However, the WTP estimate predicted by model 1 showed the absolute errors of 42 to 47% when it was compared with WTP estimated using CVM in Dams Andong and Imha. It seemed that residents of Dams Andong and Imha have feeling of being victimized since two dams were constructed very adjacently, the upstream area was designated as drinking water source protection zone, and thereafter their developmental economical actions have been significantly restricted.

• Journal of Korean Medical classics
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• v.21 no.2
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• pp.21-28
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• 2008

After translating the contents of "Treatise on Bundon Disease in Chapter 8 of the Essence of the Synopsis of the Golden Chamber" and it was compared with the contents of "The Lecture of Synopsis of Prescriptions of the Golden Chamber" and speculated to review the characteristics of the comments of Ui(尤怡) and the following conclusions were made. As the causes of bundon(奔豚) disease, which means gas rushing like a running piggy from the lower abdomen to the throat, they could be categorized into the cases belongs to miscellaneous diseases (雜病) and into the cases of suffering from cold diseases(傷寒). If it was diagnosed as miscellaneous disease, terror and fear(驚恐) could be regarded as its cause and if it was diagnosed as cold disease, insufficiency of heart Gi(心氣) due to the excessive sweating and the invasion of exterior coldness could be regarded as its cause. As the pathogenesis of this disease, the pathogenic factors of liver and kidney could be found. Since the liver and Soyang meridian(少陽經) are subjected to the exterior and interior relation in case of the pathogenic factor of liver, alternate attacks of chills and fever(寒熱往來) could be characteristic for the disease. If this disease was caused by the pathogenic factor of kidney, there are two cases. One is the palpitation under the umbilicus(欲作奔豚: 臍下動悸) developed by the lack of heart Gi(心氣) and the other is gas rushing like a running piggy from the lower abdomen to the throat which could be developed by the exterior cold disease which invade into the interior and reach into the kidney when the heart Gi(心氣) was insufficient. In its treatment, bundon disease caused by the pathogenic factor of liver could be treated with Bundontang(奔豚湯), and the understanding of Ui(尤怡) on Pinellia ternata Breitenbach(半夏) having the effect of perspiration in the prescription is quite unique concept. In case of bundon disease caused by the pathogenic factor of kidney, treatment is focused to treat exterior coldness by applying moxibustion(灸) and Gyejigagyetang(桂技加桂湯), and in case of the palpitation under the umbilicus(欲作奔豚: 臍下動悸), its pathogenic factor of kidney is controlled with Cinnamomum louerii Nees(桂技), Polia cocos Walf and the spleen Gi(脾氣) is cared by using Glycyrrhiza uralensis Fischer et. De Candolle(甘草) and Zizyphus jujuba Mill(大棗). Especially, Ui(尤怡) emphasized Cinnamomum louerii Nees(桂技) as the medication to treat the pathogenic factor of kidney.

• Journal of East-West Nursing Research
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• v.8 no.1
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• pp.50-62
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• 2003

Through this literal study, we have endeavored to provide korea's unique nursing intervention methods based upon Lee Je-Ma's Sasang Constitutional Theory which is a unique korean medical science. The Sasang Constitution Theory lay great emphasis upon health caring medicine to promote health according to self Constitution at normal times, preventive medicine to manage byself body and mind in everyday life, and eventually, ethical medicine to love benevolence and kindness but to dislike jealousy.A variety of methods has been introduced to diagnose a person's Constitution. And yet, appearance, mind and pathological signs are three major criteria. In appearance, comprehensive features such as figure (the shape of the human body), countenance, behavior, mood, and posture are observed. In mind, nature (character), talent, steadiness, personality, and greed are investigated. In pathological signs, physiological conditions when healthy and peculiar symptoms when being ill are diagnosed. By these three criteria, each Constitution is categorised into Taiyang Person, Soyang Person, Taieum Person or Soeum Person. Different healthcaring methods exist for each Constitution such as mind and body healthcaring, diet healthcaring, knowledge and behaviour leathering, age group healthcaring, regional healthcaring, social life hralthcaring, everyday life healthcaring, and materia medication healthcaring. An independent and unique healthcaring method for each person according to self Constitution could be an important nursing intervention strategy, and can product a new nursing theory. To enjoy longevity by inducing positive caring methods, I believe that individual nursing may be the most desirable nursing approach. Lee Je-Ma's Sasang Constitution caring method is not only a general nursing theory but also expected to be an important landmark/milestone/factor in Korean nursing, preventive nursing, developing new nursing intervention methods and forming new nursing theories. Therefore, it is required to conduct thorough, practical and theoretical researches in the field of nursing.

• Journal of Korean Society on Water Environment
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• v.37 no.5
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• pp.381-397
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• 2021

Off-flavor materials (geosmin and 2-methylisoborneol (2-MIB)) produced by microorganisms, such as, cyanobacteria and actinomycetes, cause freshwater use problems worldwide. Due to unpleasant taste and odor, these microorganisms have raised issues especially in drinking water resources. Recently, there has been increasing concern about 2-MIB and causal cyanobacteria, namely, Pseudanabaena, in Korea. However, material production and ecological dynamics remain largely unexplored. This study reviewed the distribution of Pseudanabaena, its species diversity, and the research trend of molecular ecology related to 2-MIB production in Korea. Based on published literature, we found that seven species of Pseudanabaena which include P. mucicola, P. limnetica, P. redekei, P. catenata, P. galeata, P. yagii, and P. cinerea appeared to occur in a variety of Korean water systems. All of these Pseudanabaena species were found in the North-Han River system (Lakes Soyang, Chuncheon, Uiam, and Paldang). Some of these species were also detected in other watersheds, but the precise species diversity was not identified. Species belonging to the Pseudanabaena genus are hard to classify through general microscopic alpha taxonomy, due to their very small cell size and similar morphological characters. Moreover, the potential of 2-MIB production cannot be detected by microscopic observation. Combining molecular ecological techniques, such as, environmental genomic materials (eDNA, eRNA) analyses to conventional methods could be useful to better understand the off-flavor material production and dynamics, thereby providing more efficient management strategies of freshwater systems.

• Journal of Wetlands Research
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• v.25 no.2
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• pp.121-131
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• 2023

This study examines the possible problem in the rainfall-runoff analysis process using the VIC (Variable Infiltration Capacity) model caused by using the effective soil depth instead of the soil depth. The parameters of the model are determined as follows. First, parameters that can be determined using available numerical information are fixed. For parameters related to direct runoff and base runoff, the recommended values of the VIC model are applied. In the case of soil depth, four cases are considered: (1) the effective soil depth is applied as the soil depth, (2) 1.5 times of the effective soil depth is applied as the soil depth by reflecting the vertical structure of the soil layer, (3) 1.25 times of the effective soil depth, and (4) 2.0 times of the effective soil depth as alternative soil depths. This study simulates the rainfall-runoff for the period from 1983 to 2020 targeting the Chungju Dam and Soyang River Dam basins of the Han River system. As a result of the study, it is confirmed that when the effective soil depth is applied instead of the soil depth, direct runoff and baseflow have opposite effects, and direct runoff increases by more than 3% while base runoff decreases by the same scale. In addition, the most influential factor in the estimation of the effective soil depth in the Chungju Dam and Soyanggang Dam basins is found to be the proportion of rock outcrop area. The difference between the direct runoff ratio and the base runoff ratio in the two basins is conformed significantly different due to the influence of the rock outcrop area.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.4B
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• pp.383-392
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• 2008

It is not always easy to estimate the parameters in hydrologic models due to insufficient hydrologic data when hydraulic structures are designed or water resources plan are established. Therefore, uncertainty analysis are inevitably needed to examine reliability for the estimated results. With regard to this point, this study applies a Bayesian Markov Chain Monte Carlo scheme to the NWS-PC rainfall-runoff model that has been widely used, and a case study is performed in Soyang Dam watershed in Korea. The NWS-PC model is calibrated against observed daily runoff, and thirteen parameters in the model are optimized as well as posterior distributions associated with each parameter are derived. The Bayesian Markov Chain Monte Carlo shows a improved result in terms of statistical performance measures and graphical examination. The patterns of runoff can be influenced by various factors and the Bayesian approaches are capable of translating the uncertainties into parameter uncertainties. One could provide against an unexpected runoff event by utilizing information driven by Bayesian methods. Therefore, the rainfall-runoff analysis coupled with the uncertainty analysis can give us an insight in evaluating flood risk and dam size in a reasonable way.

• The Journal of Engineering Geology
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• v.23 no.3
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• pp.227-234
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• 2013

The vertical shaft of a selective intake structure, which is constructed in a large reservoir, is required to be impermeable and to employ a grouting technology to prevent water inflow from the reservoir or surrounding ground. In this study, groundwater inflow is estimated using a numerical model for two cases (i.e., grouting or non-grouting cases at the exterior of a vertical shaft) and compared with data measured during an excavation at the construction site of a selective intake structure in the Soyang reservoir, Korea. Groundwater inflow is estimated to range from 444 to 754 $m^3/d$ in the case of non-grouting and from 58 to 95 $m^3/d$ in the case of grouting. The groundwater inflow measured in a vertical shaft, which ranges from 30 to 100 $m^3/d$, is similar to the simulated amount. It is recommended that before the excavation of a shaft, water inflow is estimated using a numerical model and a grouting test to ensure excavation stability and improve excavation efficiency.

• Journal of Sasang Constitutional Medicine
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• v.21 no.1
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• pp.20-27
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• 2009

1. Objects Myunghyun Symptom(瞑眩現狀) is widely regarded as 'symptoms of discharge the accumulated poison in body', 'symptoms in the process of healing' apart from any other side effects of drugs. Recently, Natural Medicine of Europe and the U.S.A named it 'healing crisis'. However, this tends to be used indiscriminately. I took a look at the meaning of the Myunghyun Symptom correctly, and the meaning at a point of Sasang Constitutional view 2. Methods It was researched on the literal study about the meaning of the Myunghyun Symptom on the book "Seokyung"(書經), "Dongeuibogam(東醫寶鍵)", "Dongyi Suse Bowon(東醫壽世保元)", "Yakjing(藥徵)", and the meaninig at a point of Sasang Constitutional view through the "Dongyi Suse Bowon(東醫壽世保元)", "Dongyi Suse Bowon Sasang Chobonguen(東醫壽世保元 四象草本卷)". 3. Results and Conclusions 1. The original meaning of the Myunghyun symptom is 'dizziness by the use of massive effective drugs'. 2. Yoshimasu Todo interprεtated broadly the Myunghyun symptoms as the discharge of the accumulated poison in body, the symptoms in the process of healing. 3. Dongmu recognized the Myunghyun symptom as dizziness by massive effective drugs and shun the use of massive effective drugs. 4. Dongmu established the concept of 'Jang-gi(臟氣) and 'Yak-gi(藥氣)' and esteemed Jang-gi more than Yak-gi. So he contended that When there is no disease does not use drugs, even if the illness prioritized the use of mild drug, use the massive effective drugs a little while when there is an acute disease. 5. When the Sasnag Constututional Drugs help the Bomyungjiju(보명지주), Sometimes the Myunghyun Symptom is appeared. it is the process of Tongoi by Taeum Drugs, Chungjang by Soyang Drugs, Gojung by Tayang Drugs, Onri by Soeum Durgs. 6. Myunghyun symptoms which used indiscriminately in present is stopped and needs a clear observation and description about the drug reactions to the patient's condition.

• Journal of Korea Water Resources Association
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• v.36 no.2
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• pp.211-221
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• 2003

The objectives of this study are to analyze the effects of time-area curve on Clark's watershed runoff method in addition to propose a GIS-based objective method for creating time-area curve. For the relative comparison of the variation of time-area curve to those of travel time and storage coefficient of Clark method, runoff sensitivities are performed on Soyang- and Chungju-dam watersheds for 1990. 9. 10~9. 14 event. The dimensionless time-area curve in HEC-1 that can be utilized in the case that the curve is not supplied is also tested in this study. The important results obtained in this study are as follows: The effects of time-area curve created by either GIS-based objective method or dimensionless curve are not significant for runoff analysis; The storage coefficient (K) and travel time( t$_{c}$), Clark's other two model parameters, are more sensitive than time-area curve for peak flow simulation. Therefore, it can be concluded that the parameters K and t$_{c}$ are more carefully estimated rather than time-area curve, when Clark method is used for runoff analysis.