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초지(草地)의 지표면(地表面) 흐름을 추적하기 위한 Kinematic Wave Model의 개발(II) -포장실험과 모형의 응용-
최종대 ( Choi Joong Dae ),( W. L. Magette ),최레환 ( Choi Ye Hwan ),류능환 ( Ryu Neung Hwan ) 한국농공학회 1993 韓國農工學會誌 : 전원과 자원 Vol.35 No.3
Runoff simulation tests to investigate the flow mechanics of nonsuomerged overland flow in a natural grass intervening land system were conducted and a modified kinematic wave overland runoff model developed by Choi et al. (1993) was verified. Nonhomogeneity and heterogeneity of the soil, slope, local topography, infiltration, grass density, and the density and activity of the soil microbes and wild animals were the major factors affecting the flow. Streamlines were disturbed by grass stems and small concentrated flows due to the disturbed streamlines and local topography were observed a lot. Relatively larger concentrated flows were observed where bundles of grass were dominant than where individual grasses were growing. Predicted hydrographs were agreed very well with measured hydrographs. Since the modified model considers grass density in computing flow depth and hydraulic radius, it can be better than existing kinematic wave model if it were used to route nonpoint source pollutant attenuation processes in many grass intervening land system.
고랭지 밭 유역에서 융설과 강우유출로 발생하는 비점오염원의 특성 비교
최용훈 ( Yong Hun Choi ),원철희 ( Chul Hee Won ),박운지 ( Woon Ji Park ),신민환 ( Min Hwan Shin ),신재영 ( Jae Young Shin ),이수인 ( Su In Lee ),최종대 ( Joong Dae Choi ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.4
Runoff, NPS pollution load and flow-weighted mean concentration (FWMC) occurred by snowmelt and rainfall runoff were compared by a variance analysis. Snowmelt runoff ranged between 1,449 and 19,921 m3/day. The peak snowmelt runoff was similar to the runoff that occurred by about 40mm/day rainfall. And average snowmelt runoff was not significantly different from the runoff that occurred by 25.5 mm/day rainfall. Average values of SS loads and FWMCs were 5,438 kg/day and 954.9 mg/L, respectively. SS loads and FWMCs were in the similar range with those that occurred by 39.0 mm/day and 53.0 mm/day rainfall, respectively. Daily SS and COD loads and FWMCs occurred by snowmelt and rainfall were analyzed not to be significantly different. Overall assessment led that the NPS pollution loads by snowmelt runoff had a similar characteristics with the loads by about 40 mm/day rainfall runoff. It was recommended that the agricultural fields in snowy region needs to managed not only for rainfall runoff but also snowmelt runoff for an effective water quality management.