Análisis de las lluvias críticas en áreas de la Empresa Agropecuaria Jiguaní, provincia Granma.

The problems of excess humidity in agricultural areas in Cuba are due to the combination of excessive rainfall, surfaces with little slope and soils with low infiltration, so the solutions to this problem are preferably directed to surface drainage. With a view to the above, the present work was directed to the determination of the design rains for a drainage system for the cultivation of citrus to develop on alluvial soils in areas of the Jiguaní Municipality in the Province of Granma; where the accumulated average annual rainfall reaches 1219 mm and the wettest month is the month of October, a total of 213 were studied and through the Thielsen method the most representative of the area under study was selected, from 27 years of Daily observations of the same that were grouped in periods of maximum rainfall of 1,2,3,4 and 5 days and in order to generate the height-duration-frequency curves and the Gumbel Type I distribution was used to obtain the rainfall of design for the calculation of runoff for return periods of 3, 5 and 10 years. By applying the Kolmogorv-Smirnov test, the veracity of the Gumbel distribution was verified with 95% confidence for the data used; while it was determined that the critical rainfall for the calculation of the runoff to be evacuated was 126.1 mm for a return period of five years and three consecutive days of rainfall. [ABSTRACT FROM AUTHOR]