| Itonomas River | |
|---|---|
 | |
| Location | |
| Country | Bolivia |
| Physical characteristics | |
| Mouth | Machupo River |
• coordinates | 12°32′20″S64°22′13″W / 12.53889°S 64.37028°W /-12.53889; -64.37028 |
| Length | 1,493 km (928 mi)[1] |
TheItonomas River is a river ofBolivia that flows through thedepartments ofSanta Cruz andBeni. It is a part of theAmazon River basin.
Originating nearConcepción Lake at the confluence of the intermittent Quimome and Santa Maria Rivers as theSan Julián River,[2] the river flows northwards until it becomes theSan Pablo River near the city ofAscensión de Guarayos,[3] after which point it forms part of the border between the Beni and Santa Cruz Departments. It then continues into further north into the Beni Department, and after flowing past the small Lake El Bi, it becomes theSan Luis River,[4] a name it retains for a short distance until taking on the nameItonomas at its confluence with the Lopez River.[5]
Despite its considerable length, the Itonomas is nominally considered to be a tributary of the shorterMachupo River,[6] which in turn drains into theIténez River only a short distance further downstream. Additionally, due to the situation of its headwaters at the eastern edge of the vastBañados del Izozog, the Itonomas can be considered to be a hydrological continuation of theParapetí River, which originates in the BolivianAndes.
Over its course it receives tributaries such as theQuizer River.
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