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And aquatic fauna? Does the construction of a lake can interfere in the life of fish and other species? The river forms a lotic environment, where the movement is intense and constant. By forming the lake, this becomes lentic, and the whole aquatic fauna suffers from it. In this process, many fish disappear, because they need to perform spawning, which is the process of migration that occur every year in the upstream direction (upstream, contrary to current) to occur gonadal maturation and can procreate and perpetuate the species. These, trapped in a lake, do not reproduce. An attempt to minimize this impact is the construction of fish ladders. Hydropower was long considered a clean energy, but recently this classification is being questioned. According to researcher Philip M. Fearnside of the National Institute for Amazonian Research (INPA), Institute of the Ministry of Science and Technology, which studies the Amazonian dams, these are sources of greenhouse gases and in the region, the greatest impact would be caused by Tucuruí, Balbina, Samuel and Curuá-A, all in the Amazon basin. He believes that such plants (reservoirs) cause at least twice the impact of generating the same energy with oil. Lotic: aquatic systems predominantly water currents, continuous flow; Lentic: aquatic environment dominated still water, or reduced current. SEARCH Search the environmental, socioeconomic and cultural needs of a large hydroelectric plant. See the table 2, some Brazilian hydroelectric plants. Considering the flooded area (in km ) and power (in mW), which is the plant more efficient? What should be the explanation for this? TABLE 2 Power / volume / wetland plants selected Data Source: MÜLLER, AC, 1995. Adapted by the author. Stop Dreaming of a Car!
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A vodene faune? Da li gradnja jezera može miješati u život riba i drugih vrsta? Rijeka tvori lotic okruženje, gdje je pokret je intenzivan i konstantan. Formiranjem jezero, ovo postaje lentiku, i cijela vodene faune pati od nje. U tom procesu, mnogo riba nestaju, jer im je potrebno za obavljanje mriješćenje, što je proces migracije koje se javljaju svake godine u uzvodnom smjeru (uzvodno, suprotno struja) da se dogodi gonadalnu sazrijevanje i može razmnožavati i vrsta održala. To, zarobljeni u jezeru, ne razmnožavaju. Pokušaj smanjiti taj utjecaj je izgradnja ribe ljestve. Hidroenergija dugo smatralo čiste energije, ali u zadnje vrijeme je razvrstavanje u pitanje. Prema istraživač Philip M. Fearnside Nacionalnog instituta za istraživanje Amazone (Inpa), Institut Ministarstva znanosti i tehnologije, koja proučava Amazone brana, to su izvori stakleničkih plinova, ali iu regiji, najveći utjecaj će biti uzrokovan Tucurui, Balbina, Samuel i Curuá-, sve u Amazone. On smatra da takve biljke (rezervoari) uzrok najmanje dva puta utjecaj generira istu energiju s uljem. Lotic: vodenih sustava pretežno vodenim strujama kontinuiranog toka; Lentiku: Vodeni okoliš dominira mirne vode, struje ili smanjiti. TRAŽI Traži na okoliš, društveno-gospodarske i kulturne potrebe velike hidroelektrane. Pogledajte tablicu 2, neki brazilski hidroelektranama. S obzirom na poplavljenom području (u km ) i snaga (u MW), što je biljka učinkovitiji? Ono što bi trebao biti objašnjenje za to? TABLICA 2 Snaga / volumen / močvarnih biljaka odabrani Izvor podataka: MÜLLER, AC, 1995. Adaptirano autora. Stop sanjao o automobilu!