• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.664-667
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• 2004

This paper is aimed at analyzing the soil erosion hazard zone in farm land. RUSLE was used for an analysis of soil erosion amount, and for the spatial data of basin, soil erosion amount was calculated by extracting the respect topography space related factors of RUSLE using DEM, Landuse, Soil map as base map. As a result of analysis on the calculated soil erosion amount according to land use type, it was analyzed that the most soil erosion occurred in orchard area, i.e., 40.08ton/ha/yr at average. It was classified into 5 classes depending on the calculated soil erosion amount. of which Class V was decided as soil erosion hazard zone, and for this area, 72.5ha or so, $2.4\%$ of the entire farm land was assessed as erosion hazard zone.

• 한국산림과학회지
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• 제95권6호
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• pp.649-656
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• 2006

인공강우발생장치를 이용하여 4년간 대구 동구지역에 발생한 산불발생지를 대상으로 산불발생지사면의 토양침식량을 계량화하기 위하여 산불발생 후 경과년수에 띠라 각 지역에 대한 강우강도 및 경사별로 토양침식량을 관측하여 산불발생지의 토양침식 특성을 구명하고, 또한 토양침식량과 강우강도, 경사, 경과년수와의 관계를 분석한 결과는 다음과 같다. 1. 산불발생연도별 토양침식량은 강우강도가 30 mm/hr씩 증가함에 따라서 1.9~5.7배 증가하였고, 경사가 $10^{\circ}$씩 증가함에 따라서는 1.4~14.2배 증가하였다. 2. 산불발생당년에는 강우강도 80 mm/hr, 경사 $30^{\circ}$에 대해 초기 강우 10분 동안 토양침식이 많이 발생하였으며, 시간이 경과할수록 점차 그 양이 감소하는 경향을 보였고, 산불발생 후 2년 뒤부터는 강우강도 및 경사별로 경과시간에 따른 토양침식량은 거의 일정하였다. 3. 산불발생 후 경과년수에 따라 강우강도 및 경사별 토양침식량은 산불발생 3년 후의 경우 발생당년에 비해 28.9%~94.1%로 감소하였고, 산불발생당년에는 강우강도 및 경사별로 토양침식량이 많았으며, 산불발생 후 2년 뒤부터 점차 토양침식량의 감소추세가 둔화되었다. 4. 산불발생지사면에서의 토양침식량에 대해 각 인자간의 영향성을 분석한 결과, 강우강도, 경사, 경과년수의 각각의 주효과와 강우강도${\times}$경사, 강우강도${\times}$경과년수의 상호작용 효과에 대해서는 차이를 보였고, 경사${\times}$경과년수, 강우강도${\times}$경사${\times}$경과년수의 상호작용 효과에 대해서는 차이가 없었다. 토양침식량에 영향을 미치는 인자의 영향도는 강우강도가 가장 큰 영향을 미치고 다음이 경사, 경과년수의 순이었다. 5. 토양침식량과 이에 영향을 미치는 인자들과의 상관관계에 있어서, 강우강도, 경사간에는 1%수준에서 유의적인 정(+)의 상관관계가 있었고, 경과년수는 1%수준에서 유의적인 부(-)의 상관관계가 나타났다. 6. 토양침식량과 이에 영향을 미치는 인자들과의 회귀분석 결과, 산불발생지사면에서 토양침식량을 설명하는데 유의한 인자는 강우강도, 경사, 경과년수이었다. 7. 강우강도, 경사, 경과년수를 이용하여 다음과 같은 토양침식량 추정식을 산출하였다. S.E = 0.092R.I + 0.211D.S - 0.942E.Y(S.E : 토양침식량, R.I: 강우강도, D.S: 경사, E.Y: 경과년수)

• 한국환경복원기술학회지
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• 제3권1호
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• pp.1-9
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• 2000

The purpose of this study was to analyze the characteristics of soil erosion on the fill-slope of forest road by elapsed years after road construction. Thirteen plots were established on the fill-slope of the newly-constructed forest road, and surveyed for two years(1997~1998). In these plots, the data about soil erosion, surface runoff, vegetation coverage, slope structural characteristics and rainfall were collected. In 1997, the major causes for soil erosion were found by the correlation coefficients with the amount of surface runoff from the fill-slope, vegetation coverage, slope length, slope degree, total rainfall and max. 1 hour rainfall. But, in 1998, the major causes for soil erosion were vegetation coverage and slope degree. Using the stepwise multiple regression method, in 1997, the amount of soil erosion from the fill-slope was complexly expressed as a exponential function of statistically significant the amount of surface runoff from the fill-slope, total rainfall, slope degree of fill-slope and vegetation coverage, but, in 1998, simply expressed as a exponential function of vegetation coverage.

• 한국물환경학회지
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• 제23권4호
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• pp.518-526
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• 2007

There have been serious soil erosion and water pollution problems caused by highland agriculture practices at Doam-dam watershed. Especially agricultural activities, chemical and organic fertilizer and pesticide applications, soil reconditioning to maintain soil fertility are known as primary causes of soil erosion and water qaulity degradation in the receiving water bodies. Among these, soil reconditioning can accelerate soil erosion rates. To develop soil erosion prevention practices, it is necessary to estimate the soil erosion from the watershed. Thus, the Universal Soil Loss Equation (USLE) model has been developed and utilized to assess soil erosion. However, the USLE model cannot be used at watershed scale because it does not consider sediment delivery ratio (SDR) for watershed application. For this reason, the Sediment Assessment Tool for Effective Erosion Control (SA TEEC) was developed to assess the sediment yield at any point in the watershed. The USLE-based SA TEEC system can estimate the SDR using area-based SDR and slope-based SDR module. In this study, the SATEEC system was used to estimate soil erosion and sediment yield at the Doam-dam watershed using the soil properties from reconditioned agricultural fields. Based on the soil sampling and analysis, the US LE K factor was calculated and used in the SA TEEC system to analyze the possible errors of previous USLE application studies using soil properties from the digital soil map, and compared with that using soil properties obtained in this study. The estimated soil erosion at the Doam-dam watershed without using soil properties obtained in the soil sampling and analysis is 1,791,400 ton/year (123 ton/ha/year), while the soil erosion amount is 2,429,900 ton/year (166.8 ton/ha/year) with the use of soil properties from the soil sampling and analysis. There is 35 % increase in estimated soil erosion and sediment yield with the use of soil properties from soil reconditioned agricultural fields. Since significant amount of soil erosion are known to be occurring from the agricultural fields, the soil erosion and sediment yield from only agricultural fields was assessed. The soil erosion rate is 45.9 ton/ha/year without considering soil properties from soil reconditioned agricultural fields, while 105.3 ton/ha/year after considering soil properties obtained in this study, increased in 129%. This study shows that it is very important to use correct soil properties to assess soil erosion and sediment yield simulation. It is recommended that further studies are needed to develop environment friendly soil reconditioning method should be developed and implemented to decrease the speed of soil erosion rates and water quality degradation.

• 대한공간정보학회지
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• 제12권4호
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• pp.75-81
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• 2004

임하호 유역은 지질 및 토지피복 상태가 토사유실에 취약한 특성을 가지고 있어, 강우발생시 토사가 하천에 유입되어 호소내에 많은 탁수가 발생하고 있다. 본 연구에서는 임하호 탁수 저감대책을 수립하기 위한 기초자료를 생성하기 위해 GIS 기반RUSLE 모형을 이용하여 임하호 유역의 토사유실량을 분석하였다. 2003년도 강우자료를 이용하여 토사유실량을 분석한 결과 5,782,829 ton/yr로 계산되었으며, 소유역별 분석에서는 동부천이 가장 높은 토사유실량을 나타내었다. 또한 태풍매미때의 탁수실측자료를 이용하여 RUSLE 모델로 산정한 토사유실량의 적정성을 평가할 수 있었다.

• 한국산림과학회지
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• 제97권4호
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• pp.363-367
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• 2008

산불 발생 후 시간경과에 따른 산불피해지의 토양침식량의 변화과정 및 환경인자와의 관계를 비피해지와 비교분석하였다. 산불발생 후 시간경과에 따른 토양침식량은 산불 당해연도 11.2배, 1년경과 후 8.4배, 5년경과 후 2배, 10년경과 후에는 1.3배 정도 산불피해지가 비피해지 보다 더 많은 침식량을 보였다. 산불피해지의 토양침식률은 10년경과 후 산불 발생 당해연도와 비교하여 98% 정도 감소하여 산불발생 후 10년이 경과하면 산불피해지의 토양침식량은 비피해지와 거의 같은 수준으로 회복이 이루어지는 것으로 조사되었다. 산불피해지 및 비피해지의 토양침식량에 직접적인 영향을 미치는 인자는 단위강우량, 단위강우횟수, 누적강우횟수 등 강우인자가 중요한 영향 인자로 분석되었다.

• 한국환경복원기술학회지
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• 제3권3호
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• pp.113-125
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• 2000

This study was carried out to introduce current status and development strategy for an environmental restoration of stream side in Japan, and to consider a methodology which could be effectively applied for the environmental restoration of stream side in Korea. The strategy prospects of environmental restoration in Japan were summarized as follows : 1. When we establish the long term erosion control planning, we should make detail planning after considering of a certain block of watershed units. Because most of the disaster is caused by soil movement which was occurred by water contents. 2. Nowadays, the general torrent erosion control planning system in Japan focused on reducing the sediment such as by placement of erosion control facility and by restoration of afforestation, after calculation of several factors including expected amount of sediment, and the different amount of planned sediment and allowable sediment. 3. In the past, the goal of forest conservation and erosion control planing was to fix the amount of soil movement by construction of permanent facilities. While, the goal of forest conservation and erosion control planning in the future needs to change the techniques to a small and middle scale's soil movement which could prevent soil movement from large scale of soil disasters, but allow soil movement effectively. Also, it is considered to change erosion control dams from non passing type to passing type. 4. Restoration of stream-side ecology, erosion control for the conservation of ecology should be planned and conducted cautiously based on concepts of ecology conservation and development of environmentally sound techniques.

• 한국습지학회지
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• 제7권1호
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• pp.107-117
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• 2005

토양침식은 강우분포, 토양, 토지이용과 같은 많은 요인들에 의해 영향을 받는다. 이런 요인들은 시간과 공간에 의해 여러 가지 형태로 나타난다. 본 연구에서는 유역에서의 토양침식 위험지역을 평가하는 것을 목적으로 하고 있으며, 토양침식량 계산은 RUSLE를 이용하였고, RUSLE의 지형 및 공간정보 관련 인자들은 DEM, 토양도, 토지이용도를 이용하여 추출하였고 유역에서 발생하는 토양침식량을 산정하였다. 연구대상유역으로는 한강수계 제1지류인 경안천 유역의 농경지로 하였으며, 토양침식량 분석결과 보통, 특수작물(1210) 재배지역, 과수원(1220), 미경지정리답(1120), 경지정리답(1110)의 순으로 가장 큰 토양침식이 발생하고 있으며, 이 재배지역의 평균 토양침식량 또한 보통, 특수작물 재배지역에서 가장 크게 나타났다. 이 토양침식량 분석결과를 이용하여 농경지의 토양침식 위험지역을 5개 등급으로 구분하여 분석한 결과 토양침식의 위험성이 가장 크다고 판단되는 5등급의 경우 전체 농경지의 2.4%에 해당하는 72.5ha정도가 침식위험지역으로 판단하였다. 이 침식위험지역은 밭작물재배지역이 72.4ha이고 과수원이 0.1ha로 분석되었으며, 기타의 농경지역에서는 5등급의 위험지역은 나타나지 않았다. 또한 토지이용 상황에 관계없이 2등급(1~50ton/ha/yr) 지역이 전체 농경지의 70.2%로 가장 많은 비율로 나타났다.

• 한국농공학회지
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• 제31권1호
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• pp.71-81
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• 1989

Soil erosion was investigated to find out difference in amount of soil eroded from slope land at early stage of young grasses and at later stage with sufficient cover with different slopes. The six experimental plots were formed on 8$^{\circ}$, 10$^{\circ}$, 15$^{\circ}$, 20$^{\circ}$, and 25$^{\circ}$, with 2m width and 20m length located at the Hwak Kok Ri, Chun Sung Gun, Kang Weon Do. The amount of soil eroded and run-off were collected from 1. May 1987. to 30. October 1988, growing with grasses sowed 2. September 1987. The results were as follows : 1. The amount of soil eroded from the plots except 8$^{\circ}$ plot exceeded the allowable soil erosion with 14 ton/ha during the land formuing before establishment of sufficient surface cover with grasses. Therefore, proper soil conservation practice should be recommeneed. 2. The amount of soil eroded increased exponentially with increased slope as 1.24 times for 15$^{\circ}$1.65 times for 20*, and 2.94 times for 25$^{\circ}$, m comparing with standared 10$^{\circ}$ polt. 3. The erosion occurred mainly by high density of rainfall exceeding lOOmm as consecutive precipitation during the raining peried or accompanied by typhoon passing. 4. The significant soil erosion, when the land covering ratio was over 95% after seeding of grass, was recorded only by the single continuous storms over lOOmm of concentrated precpitation, of which amounts were 1/73~/250 of the allowable soil erosion. 5. The amount of soil erosion from the plots with sufficient surface cover with grasses increased as the slope increased however the amounts were small enough to be neglected. 6. Desolation by soil erosion would be minor problem up to the slope of 20$^{\circ}$ when the mountainous area developed to the grassland with sufficient cover. But it could be concerned on the turn to the hare land by the treading of livestocks with the land slope over 25$^{\circ}$. 7. The run-off of rainfall increased by the increament of slope but it was not exponentially increased. 8. The run-off of rainfall after seeding of grass reduced by 20% in comparison with the run-off of rainfall before seeding, which might be due to infiltration of rainfall promoted by the grass roots.

• 한국환경복원기술학회지
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• 제4권3호
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• pp.1-9
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• 2001

The purpose of this study was to evaluate the burning impacts of the surface and crown fire occured in yongsan-ri meongsok-myun of chinju-city, Gyeongnam. Environmental influences like surface runoff and soil erosion changes were investigated by comparisons analysis between burned and unburned area about some initial effects after fire. The results obtained from this study were as followed; 1. The average amount of surface runoff in burned area was more 1.7 times than in unburned area. But it was gradually tend to decrease in burned area as times passed. 2. Factors significantly correlated to amount of surface runoff in burned area shown in order to unit rainfall, accumulated rainfall and sand content, as 0.9466 of multiple correlation coefficient, where as the factors in unburned area were unit rainfall, soil erosion, bulk density and soil hardness, as 0.9738 of multiple correlation coefficient. 3. The average amount of soil erosion in burned area was more 11.2 times than in unburned area. But it was gradually tend to decrease in burned area as times passed. 4. Factors significantly correlated to amount of soil erosion in burned area were surface runoff and unit rainfall, as 0.6305 of multiple correlation coefficient. The factors in unburned area shown in order to surface runoff, sand content, bulk density and unit rainfall, as 0.7879 of multiple correlation coefficient.