(2005) and restocking in the same hydrographic basin
was obtained from the division between the real perimeter of the small hydrographic basin
and the perimeter of an imaginary circle with an area equal to that of the small hydrographic basin
according to Equation 2.
The hydrographic basin
of the Oriental Northeast Atlantic occupies an area of 287,348 [km.sup.2] and is characterized by caatinga vegetation and a semiarid climate; the basin has average annual rainfall of 750 mm, predominantly concentrated between February and May .
Amounts of both metals observed in the surface sediments of the Uberabinha river, in Uberlandia (SILVA et al., 2011), sediments of the Sergipe River Hydrographic Basin
(SILVA et al., 2012), and sediments of the Billings Reservoir, in the state of Sao Paulo (HORTELLANI et al., 2013) were also below the PEL benchmark.
The term was used again 15 years later by Richards (1988) who claims that hydrogeomorphologic regional studies offer a better understanding of the prediction scenarios for river evolution at the hydrographic basin
Therefore, it is an important tool for management of operational procedures in reservoirs, besides permitting to evaluate how the hydrographic basin
influences water quality.
The scenic Washoe Lake area that was chosen for the mitigation site is within the same Truckee River Hydrographic Basin
as the impacted sites, and the pastoral mitigation site is entirely within the boundaries of a state park.
The state environmentalist agency Feema has said there is no danger of the cargo polluting Sepetiba Bay, whose hydrographic basin
covers three rivers and spreads along 2,400 square km.
What are the dangers to this great river, the ninth largest in the world, whose hydrographic basin
covers over 45 percent of Venezuela?