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大學 캠퍼스內 屋外空間의 지표면 상태에 따른 온열환경 변이에 관한 硏究
우창호 목포대학교 연안환경연구소 2000 沿岸環境硏究 Vol.17 No.1
Human comfort essentially depends on the factors that affects skin temperature and the perception of heat and cold. Cities tend to be warmer than the surrounding countryside on an average summer temperature. During daylight hours, solar radiation is absorbed by city surface - asphalt, concrete and others. Trees and other vegetation ameliorate air temperatures through evaporation and transpiration in summer. In order to evaluate local microclimate in university campus, temperature and relative humidity on concrete paving, lawn, pergola and forest were measured and analyzed. The results show that the air temperatures on concrete paving under the direct solar radiation was higher than that of canopied surface under forest by up to 12.7℃ during summer. Characteristics of temperatures and relative humidity on pergola were similar to those of forest. Therefore, pergola was very effective facility in terms of thermal control during summer.
GIS를 이용한 USLE 지형인자(LS) 자동계산 방법에 관한 연구
우창호,황국웅 한국조경학회 1998 韓國造景學會誌 Vol.26 No.3
Conentionally, LS factor for the USLE suggested by Wischmeier has been computed manually on topographic maps based on one dimensional approach. But outcomes of the equation could be severely affected by the convergence and divergence of surface runoff at complex terrains. Thus the objective of this research are to develop a method to automatically compute LS factor based on the multiple flow algorithm, and to test the accuracy of this method by comparing outcomes of this method to previous measurements or estimations of soil erosion. The program for the automatic calculation of LS factor was developed by utilizing Fox Pro 4.5, and outcomes of the program is designed to input to IDRISI. The accuracy test of LS factor was carried out by comparing the actual measurements of soil loss at two test sites in and around of Suwon. The calculated volume of soil erosion at Buju mountain, Mokpo, was also compared to the outcome of a previous research based on the LS factor calculated by the conventional onedimensional approach. The outcomes of this research are as follows. First, the computed L based on the multiple flow algorithm for concae slopes are greater than those of convex slopes,. Second, the estimated soil loss based on this method at the test site in Mokpo is much greater than the outcomes based on the conventional one-dimensional approach. It can e concluded that the application of this automatic calculation method of LS factor can improve the accuracy of USLE and facilitate soil erosion prevention methods.
GIS를 이용한 대규모 단지 개발지의 토양유실량 추정을 위한 USLE의 인지값 결정과 적용 방법에 관한 연구-목포시 부주산을 대상으로-
우창호,황국웅 한국조경학회 1996 韓國造景學會誌 Vol.24 No.3
The purpose of this study is to estimate the soil loss amount with Geographic Information System according to the land use change of Buju mountain area in Mokpo city. To estimate the soil loss, Universal Soil Loss Equation which is the most proper technique to predict soil loss in this site condition is adopted and IDRISI, a raster GIS software, is used. GIS application with USLE is very efficient to estimate soil loss accurately and fastly. In order to decide value and to find application method of USLE factors, we used existing rainfall erosion index, soil erodibility analysis, slope length, slope steepness, vegetation management and practices, which are rated by GIS through the analysis of various studies related USLE. The result of this study was compared with the previous other researches to verify our method of constructing numerical data of USLE's factors. The result of verification of our way showed significance for the soil loss in forest area. But the result of verification for the soil loss in forest area. But the result of verification for the soil loss of cultivated area showed some errors. It seems that this result was due to local variation of topographical map.