2차원 유한체적 수치모형을 이용한 논의 지표관개 수리특성 분석
An Analysis of Surface Irrigation's Hydraulic Gharacteristics at a Paddy Field Using a Two-Dimentional Numerical Model
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Abstract
A finite volume model is developed to simulate the surface irrigation at a paddy field. The model's capabilities are validated through comparison with the simulafed results and the observed data obtained by various experimental tests, and the simulated results are in good agreement with the observed ponding depth. The result of surface irrigation simulation shows that the longer the paddy field's the length of long-sided becomes, the longer the advance and storage time is taken. To analyze surface irrigation performance with variable inflow rate, three patterns of flow variation-constant rate, initially high then low, and initially low then high-were studied. The results show that at the pattern with initially high followed by low during the latter half of the irrigation the advance time is shortest, but the ponding depth of irrigation completion and irrigation effiency are the little difference between irrigation patterns.
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