MODIPE is based on the Soil Conservation Service Curve Number method.
To choose the curve number of a zone we must use tables that appear in most of the Hydrology books. The question is to choose from the table the more similar description to the studied zone.
The resulting curve number is inside the interval 0-100.
High curve numbers imply high run-off (=poor infiltration; =degraded slopes). On the other hand, low curve numbers guarantee high infiltration rates, low surface run-off and low hydric erosion.
In this spot of the web site we reproduce the main curve number table, so it's at hand for the user. We have also developed a Visual basic application that let you choose curve numbers automatically. This is the program NUMCUR 10 IE, in bilingual version (English-Spanish) and with a number of help windows that appear when pressing F1 key.
We also offer a PDF file (Pequeña guía de uso de MODIPÉ 465 KB , in Spanish), where we have included notes, comments and indications that are needed to use and interprete the tables correctly.
Figure: Input data for MODIPE