
A dramatic photograph in a Manaus gallery shows the stark contrast of the waters of the Amazon and the Rio Negro as they meet and continue side by side for many miles without blending.
Brazil – Pink Martini

Manaus
Welcome to Brazil. Today we look at the waters of the Amazon, first at Manaus, the capital of the state of Amazonas, where the brown waters of the Amazon, flowing in from the West and Southwest, meet the black waters of the Rio Negro, flowing in from the North and Northwest.
The second part of this post will take us to the waters of the Urubu River, an Amazon tributary where we spent an “Adventure Weekend” after leaving Manuas (These pictures are from our Brazil trip 4 years ago).
But first the great Black/Brown divide of the Amazon and Rio Negro at Manaus. As the picture above, as well as the photographs I took on the river myself will dramatically show, at this juncture the waters of the two river systems meet but don’t yet blend, and flow on eastwards visibly separated by their hues side by side for many miles.

We took a public bus to a spot just East of Manaus to a port where you can take ferries across the river.

The northern side of the river contains the black waters of the Rio Negro and its tributaries. The southern side contains the brown waters of the Amazon and its southwestern tributary rivers. The separation between the two is as clear as a horizon line, but in this case a horizon line one may visibly cross in one’s boat.



And we’ve crossed the line, and are now looking back:


8/25 UPDATE: Pictures taken from our 2016 visit to the Great Amazonian Water Divide
Today, back in Manaus, we went “private” rather than “public”; as in we took a tour boat that lingered in the brown/black water divide instead of the municipal ferry we opted for in 2012, crossing the Amazon and the Meeting of the Waters as the boat delivered passengers to opposite shores. In 2012 I had the experience of going shore to shore. Today I had the opportunity to linger at the Meeting of the Waters and take some more incisive pics of the brown/black water phenomenon.

The tour boat took us right where the two rivers come together, beginning a side by side division of waters that continues for 8 km before finally mixing as one.


Why the division? The short answer is density, temperature, speed….

Meaning, the original Amazon source is in Peru, and from there the waters carry more silt than the Rio Negro waters, making them denser (as well as browner). The Rio Negro waters originate from as far north as Columbia. They are up to 4 degrees Celsius warmer than their western Amazonian cousins (they can get as warm as 35 degrees Celsius, almost human body temperature). They also flow faster than the western Amazonian waters. All three of these factors contribute to it taking up to 8 km before the two bodies of waters have finally properly mixed as one, as two bodies of waters coming together really rather tend to do more easily.


Back to the original 8/3 post:
Even at this mid-point of the Amazon, thousands of miles from the Atlantic, the river is already so wide that the immense swath of the black half of the waters seem but a sliver from the opposite shore, and vice versa.

Still more pics of the immense Amazon ahead, and then heading towards our jungle adventure on the Urubu River. And for music I’m including a classic Brazilian pop instrumental.

Four years ago Ed and I spent a fantastic August touring Brazil. This month we do it again. Which means Notes from a Composer is going to go all out on a Brazil themed 



























You may remark that Evocation XXIII is shorter than Evocations I and II. True, it is even much more shorter than some of the early Evocations (oh, like V and X) which took on epic proportions. There is a practical as well as aesthetic reason for the briefness of Evocation XXIII, in fact the briefness of almost all the recently composed Evocations. For one, they are called Evocations, which linguistically and aesthetically connotes a hint of something, a suggestion, a brief reverie, not a lengthy meditation or exhaustive discourse (That’s what Sonatas or Rhapsodies are for, right?).


























