2006, Vol.15, No.2

Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

pISSN : 1225-7184
https://journal.kci.go.kr/kseia

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

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.

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.