Intensity-Duration-Frecuency curve of Cienfuegos

Abstract

The knowledge of the extreme precipitations and in consequence the appropriate size of the hydraulic works, for example the drain of surplus of dams, it will guarantee their correct operation and the security of the population located waters below. The calculation of the extreme rains of short duration is very important also for size the urban drainage, and this way to evacuate volumes of water that could produce floods. In the present study were determined the maximum precipitation in intervals of 10 min, 20 min, 30 min, 40 min, 50 min, 1 h, 3 h, 6 hs, 12 h and 24 h through the pluviogramas of the Meteorological Station of Cienfuegos in the period of 2001-2010; with the main objective of building the Intensity-Duration-Frequency curve (IDF). To determine the Curves of Intensity-Duration-Frequency is made the hydrometeorological calculus of peak flows in small natural basins raised by Témez (1978), which relates the intensity of precipitation for different return periods is performed. Also, in the study the synoptic patterns associated with the highest rainfall in periods of less than 24 h in Cienfuegos are identified. Is obtained the Curve Intensity-Duration-Frequency, which is a planning and analysis tool that provides long-term behavioral patterns of rainfall, and design enables reliable and effective hydraulic engineering.