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The Brazilian Geological Service (SGB) has warned that water levels have been falling since June and all rivers in the Amazon basin are expected to drop below their historical levels. In Manaus ...
By Bruno Kelly and Jake Spring. MANAUS, Brazil (Reuters) -The river port in the Amazon rainforest's largest city of Manaus on Friday hit its lowest level since 1902, as a drought drains waterways ...
At Manacapuru, the Amazon's water level is only about 24 m (79 ft) above mean sea level. More than half of the water in the Amazon downstream of Manacapuru is below sea level. [ 75 ] In its lowermost section, the Amazon's depth averages 20 to 50 m (66 to 164 ft), in some places as much as 100 m (330 ft).
A large outflow of fresh and brackish water from the Amazon mouth - the Amazon river plume - extends through the middle of the Amazonia ecoregion, being pulled north by the NBC. Combined with rainfall this lowers the salinity of the ecoregion's waters, to levels that average 35-36.75 ppm. Surface temperatures range from 22–29 °C (72–84 °F).
The average flow rate at the mouth of the Amazon is sufficient to fill more than 83 such pools each second. The estimated global total for all rivers is 1.2 × 10 6 m 3 /s (43 million cu ft/s), [ 1 ] of which the Amazon would be approximately 18%.
Bones from an Amazon pink river dolphin are embedded in dried mud along the banks of Lake Tefé in Tefe, Brazil, on Oct. 31, 2023. ... In Tefé, water levels have been dropping by as much as 1 ...
A river in the Amazon. Along the Amazon River and many of its tributaries, high annual rainfall that occurs mostly within a rainy season results in extensive seasonal flooding of areas from stream and river discharge. [6] The result is a 10–15 m (33–49 ft) rise in water level, with nutrient rich waters.
The reference water levels are used on inland waterways to define a range of water levels allowing the full use of the waterway for navigation. [1] Ship passage can be limited by the water levels that are too low, when the fairway might become too shallow for large ("target", "design") ships, or too high, when it might become impossible for the target ships to pass under the bridges. [1]