Xingu River a network of roads and polities each of which covered about 250 square kilometers. Near the source of Xingu River is Culuene River, a 600 km tributary. Xingu River The Xingu River (, , ) is a river in north Brazil. It is a southeast tributary of the Amazon River and one of the largest clearwater rivers in the Amazon basin, accounting for about 5% of its water. The first Indigenous Park in Brazil was created in the river basin by the Brazilian government in the early 1960s. This park marks the first indigenous territory recognized by the Brazilian government
Red River of the South receives little precipitation. As a result, much of the river above the Texas–Oklahoma border is intermittent, and until the river is past its great bend south in Arkansas, the flow varies widely. Most of the agriculture in the basin is sustained by groundwater, which is recharged with rainfall and riverflow. The lower course of the river flows through a series of marshes and swamps, where its flow is dramatically moderated. Native American cultures along the river were diverse, developing specialized adaptations to the many different environments. By the time of European contact, the eastern Piney Woods were dominated by the