Influência da precipitação na qualidade da água do Rio Purus

Abstract

Resumo os impactos da precipitação na qualidade da água ao longo do rio Purus, localizado no estado do Amazonas, foi investigado por meio de dados de precipitação, estimada por satélites, e informações sobre a temperatura da água, condutividade, ph, turbidez, oxigênio dissolvido e sólidos suspensos totais, adquiridas em quatro diferentes áreas ao longo do rio. os resultados mostraram correlação negativa entre precipitação e turbidez e positiva entre precipitação e temperatura, condutividade, oxigênio dissolvido, sólidos suspensos totais e ph. o uso do solo, juntamente com o regime de precipitação, parecem ser os fatores principais que determinam a qualidade da água nos pontos de amostragem.PalavRas chaves: qualidade da água, Rio Purus, precipitação, ph, condutividade. Impacts of precipitation on the water quality of the Purus River abstRactThe impacts of precipitation on the water quality along the Purus River, located in the Brazilian State of the Amazonas, was investigated using data of precipitation estimated by satellite and information about water temperature, conductivity, ph, turbidity, dissolved oxygen and total suspended solids. The data were acquired in four different areas along the river. The results showed negative correlation between precipitation and turbidity. They also showed positive correlation between precipitation and temperature, conductivity, dissolved oxygen, total suspended solids and ph. The land use together with the rainfall regime seems to be the main sources of impact on the water quality around the sampling places.

Report of the Working Group on Distribution, Habitat Characteristics and Preferences, and Group Size

“…In Ecuador, during seasonal river water fluctuations, the water temperature ranges from 24° to 32°C (Utreras, 1996). The same variation was recorded in the Purus River, Brazil (Silva et al, 2008). The temperature of white waters along the year is 29±1ºC, while in black waters the average is of the order of 30° to 31ºC (Sioli, 1985).…”

Caracterização de parâmetros de qualidade da água na área portuária de Barcarena, PA, Brasil

“…De acordo com Von Sperling (2007), fatores naturais como a dissolução de rochas e a fotossíntese, ou fatores antrópicos como os esgotos domésticos e industriais afetam o pH. Segundo Silva (2008), com o aumento das chuvas o pH tende a subir, pois aumenta a diluição de compostos dissolvidos e há um escoamento maior. Na maioria das águas naturais, o sistema carbonato controla o pH (Drever, 1988).…”

Survey of canine tick-borne diseases in Lábrea, Brazilian Amazon: ‘accidental’ findings of Dirofilaria immitis infection

“…Lábrea is a large municipality, encompassing an area of 68,229 Km 2 , with elevation varying from 61 to 75 m. It has a population of 41,600 inhabitants (population density: 0.61 inhabitant/km²), living mostly in the urban area, whereas the rural area is comprised mostly of riverine families that usually do not raise livestock, because of the scarcity of high-water level lands. The weather is typically humid equatorial, with >2,000 mm annual precipitation, and mean temperature above 25°C through the year (SILVA et al, 2008a). Lábrea has a typical landscape of lowland Amazonian rainforest, composed mostly by Igapós (permanently flooded land, roots of vegetation always submerged) and Várzeas (higher than Igapós, land is only submerged when rivers are at their highest during the wet season); some Low Plateau (high-water level lands, never submerged) also exists, such as the urban area and the Indian villages.…”