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2006, Vol.15, No.2

  • 1.

    A Study on the Evaluation and Verification of an existing Prediction Model on the Road Traffic Noise

    이내현 | Sunwoo Young | 조일형 and 1other persons | 2006, 15(2) | pp.93~100 | number of Cited : 0
    Abstract PDF
    In general, the verification to prediction formula in a national road and the main street of atown has been used recklessly in Korea. Therefore we investigated the validity of an existingprediction formula (NIER(87, 99), TR-Noise, KLC(2002)) with correction relationship which wasbased on both the prediction formular from apartment complex in the field and height 1.5mfrom the surface level. On the results of measuring the noise level form an isolated distance, thenoise level showed that it was 4.5∼5.5dB(A) by reason of becoming 2 folder far from a source.From the distribution of noise level measured by the apartment floors, the measurement point(1st floor) was 58.7~71.4dB(A) at its lowest level and the middle floors (3, 5, 7 and 10) were thehighest distribution of noise level. From the analysis results on the application validity to anexisting prediction formular (NIER(87, 99), TR-Noise, KLC(2002)) in the height 1.5m, thecorrection coefficients were 0.95∼0.96 and the measured values were reasonably close to thepredicted values, indicating the validity and adequacy of the predicted models. KLC(2002)model was found accurate within 3dB(A) with 36 data out of the total 42 data, showing themost accuracy among the predict models. However, the developed models have to improve theaccuracy with a various of factors
  • 2.

    Development of Method for Deciding Automatically Parameters of Water Quality Simulation Models

    Dohyeon Paik | Lee Yong Woon | 송광덕 | 2006, 15(2) | pp.101~109 | number of Cited : 1
    Abstract PDF
    Water quality simulation models include the difference between the measured and estimatedvalues as an inevitable consequence because they represent the complicated naturalphenomena as simplified mathematical equations. The major reason of the differenceoccurrence is due to the use of the imprecise values of the model parameters, but the parametervalues are currently determined by the try and error method directly performed by humans.However, the use of this method requires many time and endeavor of humans, and generallydoes not obtain the most suitable parameter values. A method for deciding model parametervalues is, therefore, developed in this study. The method minimizes the difference between themeasured and estimated values and also distributes uniformly the measured values on theupper and lower sides of the line representing the estimated values. A user interface based onthis method is also developed by using the Visual Basic 6.0 of Microsoft, and it can be operatedin the environment of Windows 98/2000.In this study, the method for deciding model parameter values is applied for estimating thewater quality of the stream Ko-heung. The results of the application show that the method,including its computer program, can effectively obtain the most suitable parameter values andalso save many working time in comparison with the existing method directly performed byhumans.
  • 3.

    Nature-adapted Rainwater Management Facility Casesin Korean Apartment Complexes

    Chang, Sun-young | KyoungHak Hyun | 안성식 | 2006, 15(2) | pp.111~119 | number of Cited : 4
    Abstract PDF
    In Korea, an environment-friendly concept of “rain re-cycling” was initially introduced inapartment complex planning and designs in the late 1990s. Although its application cases areextremely few, with the growing importance of rainwater utilization, introduction of rainwatermanagement facilities in urban areas began to drawn keen attention.In urban areas also, plans to introduce rainwater management facilities in apartmentcomplexes as infrastructure improving living environment, such as sewage treatment facilitiesare very urgently required. In order to introduce rainwater management facilities asinfrastructure in an apartment complex, apartment complex cases that had introduced thefacilities were reviewed first.In this study, a few applied rainwater management facilities in an apartment complex weresurveyed(Infiltration barrel, Rubble porosity storage tank, Underground storage tank). As aresult, problems in introducing rainwater management facilities in apartment complexes inKorea were identified.
  • 4.

    Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data

    Kim Tae Geun | 2006, 15(2) | pp.121~127 | number of Cited : 1
    Abstract PDF
    The conventional water quality measurements by point sampling provide only site specifictemporal water quality information but not the synoptic geographic coverage of water qualitydistribution. To circumvent these limitations in temporal and spatial measurements, the use ofremote sensing is increasingly involved in the water quality monitoring research. In other toassess a trophic state of Yongdam reservoir using satellite imagery data, I obtained LandsatETM data and water quality data on 16th September and 18th October 2001. The approachinvolved acquisition of water quality samples from boats at 33 sites on 16th September and 30sites on 18th October 2001, simultaneous with Landsat-7 satellite overpass. The correlationcoefficients between the DN values of the imagery and the concentrations of chlorophyll-a wereanalyzed. The visible bands(band 1,2,3) and near infrared band(band 4) data of Septemberimage showed the correlation coefficient values higher than 0.9. The October image showed thecorrelation coefficient values about 0.7 due to the atmospheric effect and low variation ofchlorophyll-a concentration. Regression models between the chrophyll-a concentration and DNvalues of the Landsat imagery data have been developed for each image. The regression modelwas determined based on the spectral characteristics of chlorophyll, so the green band(band 2)and near infrared band(band 4) were selected to generate a trophic state map. The coefficient ofdetermination(R2) of the regression model for 16th September was 0.95 and that of theregression model for 18th October was 0.55. According to the trophic state map made based onAizaki’s TSI and chlorophyll-a concentration, the trophic state of Yongdam reservoir wasmostly eutrophic state during this study.
  • 5.

    Variational Characteristics of Nutrient Loading in Inflow Streams of the Yongdam Reservoir Using Flow-Loading Equation?

    Kim Tae Geun | 2006, 15(2) | pp.129~138 | number of Cited : 10
    Abstract PDF
    The measurements of nutrient and runoff in 4 streams have been performed before and afterthe rainfall in order to estimate nutrient loads in the Yongdam reservoir. The equations for therelationship between the flow and the loads in each stream could be estimated by the regressionanalysis. R2 of TN showed the range from 0.95 to 0.99 and the range of R2 for TP was 0.90~0.95based on the results of the regression analyses. In 2002, total loadings from the upstream to theYongdam reservoir were TN 1,175 ton/year, TP 69 ton/year. There were 64.9% of TN and72.3% of TP during 4 months as the flood season. Due to the rainfall, the load of TP was higherthan one of TN in Yongdam reservoir.
  • 6.

    Improvement Alternative of Korean Environmental Assessment through the EA of the European Union

    ImSoon Kim | 한상욱 | 박주현 | 2006, 15(2) | pp.139~155 | number of Cited : 5
    Abstract PDF
    The introduction of Strategic Environmental Assessment (SEA) has strengthened andextended the value of Environmental Impact Assessment (EIA) as a fundamental tool forsustainable development. In particular, SEA helps to overcome the limitation of project EIA as astand alone approach that is applied relatively late in the decision making cycle. SEA is appliedto proposals of policy, plan, and/or programme when major alternatives are open.In Korea, similar to SEA, the Prior Environmental Review System (PERS) was introduced toovercome the limitations of the EIA, by checking the environmental impacts on major policyand administrative actions in the early stage of decision making process.SEA appears in various national, regional and international laws. SEA is addressedspecifically in the UNECE SEA protocol to the Espoo Convention on Environmental ImpactAssessment in a transboundary context, as well as the European Commission SEA Directive(2001/42/EC). SEA is a valuable tool for integrating sustainability decisions into country’spolicies, plans and programmes.This paper reviews the policy direction for implementation of the SEA and efficientEnvironmental Assessment (EA) through integration of the PERS and the EIA.