Hi, Amobichukwu,

If your wanted output is to calculate the erosivity of an area, I think you need a hyetograph which is made of time-sequence of rainfall intensity. Please check the formation of input data your model required.

OR, if you absolutely need an rainfall intensity (mm/h) at a specific time "t", you can use Talbot or Sherman equations.

I hope this answer would help.

Hi Amobichukwu,

In addition to Naohisa Nakashima it depends on the data needed for the erosivity equation. I you need rainfall intensity in mm/h and you only have data for one time step of 1 hour, then you can use that hourly rainfall amount to represent the rainfall intensity in mm/h.

If you have for instance a rainfall amount of 10 mm in 30 minutes and a dry spell before and after that rainfall event, then the rainfall intensity is (averaged) 10 mm/h. If you have no information on rainfall before and after this 30 minutes rainfall event, you might estimate the rainfall intensity as 10 mm/30 minutes rather than 10 mm/h or for instance 20 mm/h.

Hope this helps,

Martijn

I think you can do a program that makes that calculation, but you have to have a database of a specific place, that is the problem, since it will depend on the soil conditions and whether or not it has vegetation.

Hello Amobichukwu,

I sugget you this paper to know the details about the erosivity index (intensity, rainfall energy,...)

Article Rainfall erosivity in Europe. Sci Total Environ

Kind regards

Mourad GUESRI

Several authors used different criteria for rainfall intensity and rainfall totals for determination of erosive rainfall for USLE equation. We summarize it in this paper: https://www.researchgate.net/publication/315464043_Evaluation_of_discrepancies_in_spatial_distribution_of_rainfall_erosivity_in_the_Czech_Republic_caused_by_different_approaches_using_GIS_and_geostatistical_tools