Aplicação e análises de modelos hidrológicos com restrição de dados em uma sub-bacia hidrográfica da Amazônia

Abstract

Mato Grosso has developed in the last years technologies to increase the crop, decreasing conversion new areas, highlighting the use of irrigation mainly by spraying by center pivot. The growing demand of water resources, a necessity for tools to assist the public administration in planning and management, among them the hydrologic modeling search for mathematical methods to predict the behavior of the hydrological cycle in a region, the different changes brought in soil, vegetation and climate. Thus, this study aimed to evaluate the calibration and validation of the IPH II model, In different arrangements, the performance of the IPH II, SWAT - Parasol algorithm and SWAT - algorithm SUFI2 with a data series restricted to basin of Caiabi river, Located between the municipalities of Sinop and Vera-MT. Differentiation of the array of data for calibration positively influenced the performance of the IPH II model, having the arrangement with 60% of the data inserted in the middle of the base for calibration and validation with the 20% of the extremities the best performance in the calibration and validation. In the comparison between the IPH II and semi-distributed models (SWAT - SWAT algorithm - SUFI2 algorithm) the IPH II showed better performance, showing that the concentrated models may be an alternative for watershed with restricted data, for input data simplification of the model. The permanence curves generated by the IPH II model presented good precision, being able to be an alternative to determine the Q95% in granting processes in watershed with little monitoring time.