A look at the rivers and tributaries of Cyrod

Ignoring for a moment that Oblivion lacked any implications of the cyrod's culture involving their rivers, lets take a look at the different rivers present, and take a look at what little assumptions we can draw from them (and see what of my hedcannuns I can apply)

The Niben River System- The Most famous river of Cyrodiil, and also the largest in Tamriel, both in length and width.  It branches off several times into massive tributary systems that spread all across the Niben Basin.  The river itself is divided commonly into three parts:  The Lower Niben, the upper Niben, and the Niben Bay.

	The Lower Niben
		(What we know)
		The Lower Niben is the piece of the river that lies southward from the Panther system and the Bay.  It connects out
		to the topal. It lacks tributary systems, more or less simply flooding over into the swamps of the Blackwood.
		Pretty much the only definitive enclave of beastfolk within Cyrodiil- here, they are the majority.
		(headcanon)
		The Lower Niben, along with the Cheydin, is the only section of the Nibenay not initially aligned with the
		Alessians.  In fact, it wouldn't be until Reman that the Blackwood and Leyawiin became considered politically (for
		a while) part of Cyrod, and it wasn't until the third era that the western bank in its entirety was added to the
		province.  In its earliest days, following revolution, the freedmen of the lower niben (let's call them swamp
		nibens) were an independent group; not really a unified government or anything, just a mass of tribes not directly
		tied to the Alessians via allegiance.  Some did have loyalty to the empire, others more or less honored alessia but
		did not serve her.  Their city, Leyawiin, was once an Ayleid sugarcane plantation, an operation the ex-slaves
		resumed.  They divided the plantation up among themselves and built a town on the riverbank, the initial bricks of
		which are believed to have been alabaster stone hewn from old Leyawiin's ruins.  Using the knowledge they already
		had from their days as slaves they cultivated sugar (not moon sugar), and traded it with the Khajiiti kingdoms and
		tribes to the west of them, and the alessians to the north of them.  Rather than bond culturally with the Nibens to
		the north, the Swamp Nibens became more involved with the western khajiit, until it was in someways part of the
		whole khajiiti cycle of goods exchange.  As mentioned earlier, Leyawiin first fell under the domain of Cyrod with
		the Reman dynasty, when Black Marsh and Blackwood were claimed by the Imperials.  It wouldn't last long though, as
		by the start of Interregnum the people of Leyawiin had allied themselves with the mane and Elsweyr.  In his
		conquests Tiber Septim captured the lower niben back from Elsweyr, taking Leyawiin and Blackwood but not the rest
		of the Western Bank.  Under the Septim dynasty, which at various points worked hard to 'kill' the fractitious
		subcultures of the Niben, Leyawiin was appointed a Heartlander count and was frequently 'settled' through the use
		of incentives to those who would move to the harsher lower Niben and bring their livelihood with them.  By the time
		of Oblivion, the ethnic swamp nibens had mostly been pushed out of the city itself, leaving mostly the more
		northern descent Cyrods and the Beastfolk.  Across Blackwood the Western Bank, annexed at some point during the
		Septim empire, however, the swamp nibens are present.  Though some live tribally still deep within the Blackwood,
		the majority of them live in heartland style villages, where their indigenous subsect of Cyrodiilic culture is
		slowly squashed generation by generation.

	The Upper Niben

	Lake Rumare

	The Niben Bay

	The White Rose river system

	The Larsius

	The Corbolo-Reed river system

	The Silverfish river system

	The Panther river system

The Strid

The Brena