Modeling runoff with AnnAGNPS model in a small agricultural catchment, in Mediterranean environment

摘要: Agricultural activities, as part of the natural resource management practice, impact soil and water quality at watershed or catchment level. Field monitoring is often used to evaluate acquire knowledge impacts practices on productivity environment. Computer simulation models, after calibrated validated, provide an efficient effective alternative for evaluating effects agricultural The main objective calibrate validate AnnAGNPS model relatively runoff peak flow using five hydrologic years data, rain irrigation season. study located in Portugal, covers area 189 ha, divided into 18 fields belonging four farmers. climate typically Mediterranean with continental influence, crops are oat, tobacco, sorghum maize. calibration was done manually, but a systematic away, order select values statistical parameters so that closely simulates flow. results obtained validation model, confirm good very performance simulate volume daily event scale, rainfall Also, indication validity larger periods time, example