2006, Vol.15, No.4

Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

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

In case of studied area located around the sea, the data measured from the regionalmeteorological office is highly different from the local weather data because the diffusivity offugitive dust varies considerably with meteorological conditions. Especially, it is very difficultto predict the amount of fugitive dust accurately as wind speed remains high frequently. In thisconsider the effect of wind speed on the amount of fugitive dust generated from thereclamation site. The amount of fugitive dust estimated as mentioned above was simulated byusing ISCST3 model. As a result, in case of using only the Fugitive Dust Formula which isusually used in Environment Impact Assessment, the predicted PM10 concentrations withpoints were 43.4~67.8mg/m 3particulates, the predicted values of PM10 with points were 43.3~69.1mg/m 3, 49.5~90.4mg/m 3and 76.0~182.6mg/m 3 with the wind speeds of 4.4, 5.8 and 7.7m/s, respectively. It could bepossible to predict the amount of fugitive dust accurately because these predicted values werefugitive dust in this area damaged by fugitive dust which is caused by wind.

Impacts of global warming have been identified in many areas including natural ecosystem.A good number of studies based on climate models forecasting future climate have beenconducted in many countries worldwide. Due to its global coverage, GCM, which is a mostfrequently used climate model, has limits to apply to Korea with such a narrower andchanges with a climate model fully reflecting characteristics of Korean climate. In this respect,this study was designed to compare and analyze the GCM and RCM in order to determine asuitable climate model for Korea.In this study, spatial scope was Korea for 10 years from 1981 to 1990. As a research method,current climate was estimated on the basis of the data obtained from observation at the GHCN.Future climate was forecast using 4 GCMs furnished by the IPCC among SRES A2 Scenario asfor the purpose of comparing data obtained from observation with GCM and RCM.As a result of this study, average annual temperature of Korea between 1981 and 1990 wasfound to be around 12.03˚C, with average daily rainfall being 2.72mm. Under the GCM,average annual temperature was between 10.22 and 16.86℃, with average daily rainfallCorresponding Author: Jae-Uk Kim, Graduate School of Environmental Studies, Seoul National University, San 56-1, Shillim-dong, Gwanak-gu, Seoul, 151-742, Korea Tel: 82-2-880-4885 E-mail: japa95@hanmail.net

The purpose of this study is to understand the relation between the land use status inwatersheds and stream turbidity. Major water quality components (flow rate, turbidity, SS,BOD, TN, TP, etc.) of two streams (Jaun and Naerin) and the land use status for eachoverlaying of land use and watershed map. The detailed results of this study showed that;turbidity has been increased rapidly from 1.9 to 13.0 NTU for Jaun Stream, 0.4 to 0.7 NTU forNaerin Stream, due to the increased flow rate during the period of June. The agricultural area ofthe Jaun watershed was 13.5km2 (10.1% of the overall watershed), comparing to 2.0km2(1.4%)of upper watershed of Naerin stream. The forest was widely distributed along the 30mbuffering zone from the center of Naerin stream, which comprised 64.14% of the wholewatershed area. But in case of the Jaun, the ratio of forest was 17.84%, while the ratio of farmingfield was 30.33%.