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Oral

Watershed

Curve Number Parameters for Different Crop Management Systems in Colombia

Wednesday, May 21, 2025
2:00 PM – 2:15 PM Alaska Daylight Time (AKDT)
Room: Room 4
Abstract Submission: Studies have highlighted the importance of establishing specific Curve Number (CN) values for local drainage areas or watersheds to accurately reflect the influence of soil type and management practices on the hydrological response of the area under study. A collection of precipitation-runoff datasets obtained from runoff plots at the Experimental Station La Libertad in Villavicencio, Colombia, was utilized to compare two calibration methods (Least Square Error (LSE) and Asymptotic (ASY)) and to determine the most suitable parameters (CN and Ia/S) for six different soil type and land use scenarios in the Colombian Orinoquia. The results of the statistical analyses were not conclusive in determining the most effective calibration method for establishing an optimal Ia/S value. Nevertheless, it was recommended to use LSE and Ia/S values below 0.2, preferably zero (0), to determine representative CN values for the study area in Colombia.

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