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The Paranena region, which is inclusive of the region of Paraguay, is having all the noteworthy geographical features and the type of weather is much more conventional. The Chaco region is chiefly plain area and also it has proclivity towards Rio Paraguay that is alternatively dry and flooded.
The drainage of the Paranena region is derived mainly from the rivers that flow westward to Rio Paraguay. There are five physiographic sub-regions at the Paranena region. The five physiographic sub regions are as follows:
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The Gran Chaco is further subdivided into Upper Chaco or the Alto Chaco and the Lower Chaco or the Bajo Chaco. The highest parts in the Gran Chaco are the low hills located at the north western part of the Alto Chaco.





