(unnamed)

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(unnamed) flows into Rio São Mateus , which it joins at S 28° 19′ 3″, W 49° 57′ 3″ at OSM node n8796368170, and there 36 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• Arroio Charqueadas, which joins it at S 28° 17′ 31″, W 49° 57′ 8″ at OSM node n8796361611, and 3 km of total upstream flows in.
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