SWAT 모형을 이용한 볏짚매트의 토양유실 저감효과 분석 = Analysis of Soil Erosion Reduction Effect of Rice Straw Mat by the SWAT Model

다국어 초록 (Multilingual Abstract)

The purpose of this study is to evaluate sediment yield reduction under various field slope conditions with rice straw mat. The Vegetative Filter Strip Model-W (VFSMOD-W) and Soil and Water Assessment Tool (SWAT) were used for simulation of sediment yield reduction effect of rice straw mat. The Universe Soil Loss Equation Practice factor (USLE P factor), being able to reflect simulation of rice straw mat in the agricultural field, were estimated for each slope with VFSMOD-W and measured soil erosion values under 5, 10, and 20 % slopes. Then with the regression equation for slopes, USLE P factor was derived and used as input data for each Hydrological Response Unit (HRU) in the SWAT model. The SWAT Spatially Distributed-HRU (SD-HRU) pre-processor module was utilized, moreover, in order to consider spatial location and topographic features (measured topographic features by field survey) of all HRU within each subwatershed in the study watershed. Result of monthly sediment yield without rice straw mat (Jan. 2000 - Aug. 2007) was 814.72 ton/month, and with rice straw mat (Jan. 2000 - Aug. 2007) was 526.75 ton/month, which was reduced as 35.35 % compared without it. Also, during the rainy season (from Jun. to Sep. 2000 - 2007), when without vs. with rice straw mat, monthly sediment indicated 2,109.54 ton and 1,358.61 ton respectively. It showed about 35.60 % was reduced depending on rice straw mat. As shown in this study, if rice straw mat is used as a Best Management Practice (BMP) in the sloping fields, rainfall-driven sediment yield will be reduced effectively.

참고문헌 (Reference)

1 신민환, "인공강우기에 의한 시험포장 토양유실량 모의 - 강우강도, 지표면 및 경사조건 변화 -" 한국물환경학회 25 (25): 785-791, 2009

2 허승오, "옥수수 재배 경사지 밭에서 물 유출에 따른 토양유실 예측 공식" 한국토양비료학회 38 (38): 66-71, 2005

3 예령, "기후변화에 따른 대청호 유역의 물 순환 및 토양 유실량 영향" 한국물환경학회 25 (25): 821-831, 2009

4 최봉수, "경사지 토양유실 방지를 위한 PAM(Polyacrylamide) 시제품의 효율성 비교평가: 실내 인공강우 실험" 한국환경농학회 28 (28): 249-257, 2009

5 서종호, "경사지 밭토양 유실억제 및 질소비료절감에 대한 피복작물 헤어리벳치의 효과" 한국토양비료학회 38 (38): 134-141, 2005

6 Muñoz-Carpena, R., "Vegetative Filter Strips Hydrology and Sediment Transport Modeling System. Model Document & User's Manual"

7 Arnold, J. G., "Spatial scale variability in model development and parameterization" Purdue University 1992

8 Neitsch, S. L., "Soil and Water Assessment Tool User's Manual Version 2005" USDA, ARS 2005

9 Neitsch, S. L., "Soil and Water Assessment Tool Theoretical Documentation Version 2005" USDA, ARS 2005a

10 장원석, "SWAT HRU 단위의 경사도/경사장 산정을 위한 SWAT SD-HRU 전처리 프로세서 모듈 개발" 한국물환경학회 25 (25): 351-362, 2009

11 Arabi, M., "Representation of agricultural conservation practice with SWAT" 22 (22): 3042-3055, 2007

12 Arnold, J. G., "Regional estimation of baseflow and groundwater recharge in the Upper Mississippi river basin" 227 (227): 21-40, 2000

13 Srinivasan, R., "Plant and hydrological simulation for the conterminous U.S. using SWAT and GIS" 10 (10): 160-168, 1995

14 Jha, M., "Optimal Placement of Conservation Practices Using Genetic Algorithm with SWAT" Center for Agricultural and Rural Development, Iowa State University 2009

15 Muñoz-Carpena, R., "Modeling hydrology and sediment transport in vegetative filter strips" 214 (214): 111-129, 1999

16 Ministry of Environment, "Management of alpine farmland in Soyanggang dam watershed" Ministry of Environment 3-16, 2007

17 Arnold, J. G., "Large area hydrologic modeling and assessment: part I: model development" 34 (34): 73-89, 1998

18 "Korean Soils Information"

19 Jha, M., "Impact of watershed subdivision level on flows, sediment loads, and nutrient lossless predicted by SWAT" 22-23, 2002

20 "EGIS"

21 장원석, "Development of the SWAT DWDM for Accurate Estimation of Soil Erosion from an Agricultural field" 한국농공학회 52 (52): 79-88, 2010

22 Brown, L. R., "Conserving soils. in: State of the World" Norton 53-75, 1984

23 Jun, M. S., "A device for reducing muddy water in the watershed of Soyang Dam" Gangwon Development Research Institute 131-140, 2007