In December of 1993, I was invited to lecture at the National Institute of Hydrology, in Roorke, India. My presentation was titled "Management of floods and droughts in semiarid regions." Two years later, in 1995, I followed with a related paper entitled Management of droughts and floods in the semiarid Brazilian Northeast: The case for conservation.". The theoretical concepts were presented in the paper "Surface albedo and water reseources: The hydroclimatological impact of human activities," published in 1997.

A key element of the theory is Budyko's model, which separates precipitation into its advective and evaporative components. A crucial step is the quantification of the water vapor advected into the control volume.

At the end of the lecture, one of the participants confided to me: "Prof. Ponce, I have been in the field of hydrology for about ten years, and have not heard anybody talk about advective precipitation."


Sunset at Calangute Beach, Goa, India

Sunset at Calangute Beach, Goa, India.