frequency studies are, essentially, an application of the theories of probability and are based on available records of flood experiences. several methods of analysis, based on the mathematics of probabilities, have been proposed which, when applied to the same series of data, yield frequency curves which are in reasonable agreement throughout a useful range of probabilities. a widely used meth...

Ombrian curves, i.e., curves linking rainfall intensity to return period and time scale, are well-established engineering tools crucial the design against stormwaters floods. Though at-site construction of such is considered a standard hydrological task, it rather challenging one when large regions interest. Regional modeling ombrian particularly complex due need account for spatial dependence ...

In this paper simple quartic trigonometric polynomial blending functions, with a tensionparameter, are presented. These type of functions are useful for constructing trigonometricB´ezier curves and surfaces, they can be applied to construct continuous shape preservinginterpolation spline curves with shape parameters. To better visualize objects and graphics atension parameter is included. In th...