The application Hydrology Application - Physiographic Calculations and Concentration Time, is developed for Android (IOS), under JavaScript source code, it is available for free in the Play Store (Google). Calculates the width of the basin (km), the Horton Factor (kf), the elongation ratio, the compactness coefficient (kc), the circularity ratio, the density of drains, the channel stability constant and the density current. The concentration time is calculated in hours from the equations proposed by Temez, Kirpich, California C-P, Scs-ranser, Giandotti, Clark, Pilgrim and McDermott, Passini, Williams, Johnstone & Cross, V. T. Chow and Pérez.

| Patrimonial right holder: Francisco José de Caldas District University. Copyrights © | Bogotá D. C. | Colombia |

Authors:
Edgar Orlando Ladino Moreno
Cesar Augusto Garcia Ubaque
Eduardo Zamudio Huertas

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Clarification: The tool developed is pedagogical and educational. The use of this tool in real scenarios is the direct responsibility of the person who implements it. The authors are not responsible for the results generated by the application under real conditions.