Assessment of obtaining IDF curve methods for Mexico

Abstract

This paper assesses the methods of obtaining IDF curves for the country of Mexico: Wencel modified, Chen, Chen modified, Témez and Témez modified. The data came from a total of 63 automatic weather stations distributed throughout the country, recording data every 10 minutes and completed a minimum of 7 years. For analysis, coastal stations have differentiated when they are 50 or so km from the coast, and the other as indland. In this work we have calculated for all stations, all parameters of the IDF methods mentioned, for durations between 10 minutes to 24 hours and for a return period between 2 to 500 years. Where available disaggregated precipitation data every 10 minutes or less, we recommend using modified Wencel´s method. Where it is available hourly rainfall data, then it is recommended the use the Chen`s method. And when exist only availability of daily rainfall data, for durations less than 2 h is recommended Témez modified method. For durations longer than 2 h, Chen modified is recommended for inland areas and Témez modified for coastal areas.