نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد آبیاری و زهکشی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران
2 استادیارگروه مهندسی آب، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران
3 دانشیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Infiltration and roughness coefficients have significant effect on infiltration and furrow irrigation simulation. The variability of these coefficients and also wetted perimeter during irrigation and among different irrigations can lead to inaccurate modeling results. Therefore, in this study, the infiltration parameters and roughness coefficient were first estimated using two point method and multilevel calibration method with a complete hydrodynamic model. The effect of scaling method was then evaluated. Two sets of field data, walker and Printz were utilized for the verification of the results. RMSE values for advance phase were reduced from 5/76 to 3/72 for Prints irrigation data with two point method and increased for recession phase from 2/72 to 2/75. This method caused the recession simulation error to increase from 5/99 to 26/98 and the advance error to reduce from 15/18 to 13/23 for walker irrigation data. The scaling method had the similar results to two point method. However, the advance and recession error in both Walker and Printz irrigations were reduced using the multilevel calibration method.
کلیدواژه‌ها [English]
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