Study Design
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چکیده
Wetlands are broadly defined as a variety of shallow water bodies and high ground water environments that are characterized by permanent or temporary inundation or, in other words, a terrestrial ecosystem which hydraulic condition is that of water saturated soils with plants and animals adapted to life in such an environment (Lewis, W.M., 1995). From a hydrological point of view, the Ibera wetland is located in the Del Plata Basin, which covers some 3.5 million square kilometers within five countries of South America: Brazil, Paraguay, Bolivia, Uruguay and Argentina. The main watercourses are the Parana, Paraguay, Pilcomayo, Bermejo, and Uruguay rivers. Many hydroelectric dams have been built along these rivers, being the Parana River the one with the largest numbers of dams, basically due to its 4,000 Km. and an average flow of 19,000 m3 s-1. The climatic and geomorphologic features of this basin are ideal for the formation of large inland wetlands, among which can be found the Pantanal in Brazil, Ñeembucu in Paraguay and the Esteros del Ibera in Argentina
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