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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.
초지(草地)의 지표면(地表面) 흐름을 추적하기 위한 Kinematic Wave Modeldml 개발(開發)(I)-이론(理論) Model의 개발(開發)-
최중대 ( Choi Joong Dae ),( W. L. Magette ),최례환 ( Chou Ye Hwan ),류능환 ( Ryu Neung Hwan ) 한국농공학회 1993 韓國農工學會誌 : 전원과 자원 Vol.35 No.2
A modified kinematic wave model of the overland flow in vegetated filter strips was develop-ped. The model can predict both flow depth and hydraulic radius of the flow. Existing models can predict only mean flow depth. By using the hydraulic radius, erosion, deposition and flow’s tansport capacity can be more rationally computed. Spacing hydraulic radius was used to compute flow`s hydraulic radius. Numerical solution of the model was accomplished by using both a second-order nonlinear scheme and a linear solution scheme. The nonlinear portion of the model ensures convergence and linear portion of the model provides rapid computations. This second-order nonlinear scheme minimizes numerical computation errors that may be caused by linearization of a nonlinear model. This model can also be applied to golf courses parks, no-till fields to route runoff and production and attenuation of many nonpoint source pollutants.