Pampa region (Plain) occupies the central-south of the Province of Santa Fe, Southern Cordoba, Buenos Aires and eastern La Pampa.
* Terrain: is plain to slightly wavy, and has two mountain systems ( Tandilia saws and saws Ventania ). The central area includes the watershed of the Salado River , depressed area with several lakes.
* Climate: The climate is arid steppe, with a temperature annual average of 15 ° C, rainfall is less than 500 mm per year, the prevailing winds are the northeast and southwest.
* Biome: this region has Pampa steppes is the appearance of a vast plain with ripples on the northeast and south interrupted by systems and Ventania Tandil mountain. This plain is dotted with lakes, swamps and ravines.
The vegetation was dramatically changed natural by action of man through cultivation, grazing and construction of cities. This is the reason why the guanaco and the pampas deer are practically extinct.
The fauna is scarce and original is represented by hares and viscacha, among others. Some of the birds are the ostrich, the screamers, flamingos, partridges.
* Hydrography: It is located in the Salado River basin of Buenos Aires, there are frequent floods since there are no outstanding drainage, in addition to the dunes in the Bay of Samborombón is complicated even more, the evacuation of water.The Pampas is the region where they form the River Plate Basin (important for its economic potential), the most important rivers that form it are the Paraná and Uruguay, whose confluence, originates the Río de la Plata. You also have other rivers that are usually rocky and sandy beds and flow varies throughout the year, forming basins of irregular regime. The rivers are harnessed to generate hydroelectric power and as a means of communication.