About 49% of the park is flat plains, 18% gently undulating, 21% undulating, and 10% strongly undulating. 1% is mountainous.
Altitudes range from 39 to 457 metres (128 to 1,499 ft) above sea level.
The park holds 39 river sub-basins.
The largest is that of the São Tomé River, which occupies 23% of the area and has all its sources in the park.
The Sucunduri River basin in the north of the park covers 10% of the total area.
The rivers are classed as clear water. They are green or olive-green in the dry seasons, muddy in the rainy season.
Navigability is poor for vessels of any size due to rocky outcrops, small or large rapids and waterfalls.[3]
In 2014 the federal government was considering a proposal to declare the Juruena National Park an area of public utility in preparation for constructing two hydroelectric dams in the site, the São Simão Alto and Salto Augusto Baixo.
The planned dams had a forecast capacity of 4,940 MW.[7]
The National Council for Energy Policy (CNPE) had two seats for civil society members, but these had not been filled.
WWF-Brasil led a campaign against the energy project, which would flood an area of over 40,000 hectares (99,000 acres).[8]
In September 2014 the federal government withdrew its proposal.
The dams would have flooded parts of the Juruena National Park, Igarapés do Juruena State Park and the Escondido and Apiaká do Pontal indigenous territories in Mato Grosso, and would have affected part of the Sucunduri State Park in Amazonas and other indigenous territories.[7]
Conservation
The park is classed as IUCN protected area category II (national park).[3]
The basic objective is to preserve natural ecosystems of great ecological relevance and scenic beauty such as the waterfalls of the Juruena River at Salto Augusto and San Simon, and to support scientific research, environmental education and interpretation, recreation in contact with nature and ecological tourism.[3]
The park aims to protect the biological diversity and natural landscapes of the lower Juruena - Teles Pires and upper Tapajós region.
It ensures a healthy ecosystem in the crucial Southern Amazon region between the Tapajós and Madeira rivers.[3]
The park protects many endangered species including the jaguar, giant otter and harpy eagle.[9]
The park forms part of an ecological corridor, that includes Xingu Indigenous Park in Mato Grosso and Pará, the Terra do Meio Mosaic in Pará, the Juruena National Park in Amazonas and Mato Grosso, the Apuí Mosaic in Amazonas and then the Campos Amazônicos National Park in Amazonas and Roraima.[2]
The corridor is intended to contain agricultural expansion into the central Amazon region and deforestation.[3]
The conservation unit is supported by the Amazon Region Protected Areas Program.[10]
Environment
Average annual rainfall is 1,000 millimetres (39 in). Temperatures range from 17 to 34 °C (63 to 93 °F) with an average of 27 °C (81 °F).[3]
The region is a transition zone between the Amazon biome and the xeromorphic formations of the Cerrado biome. The park has 22,771 hectares (56,270 acres) of water and 1,934,229 hectares (4,779,580 acres) of different types of vegetation. 53.4% is dense or open rainforest, and 36.35% consists of contact areas or enclaves of rainforest with other formations such as wooded or park savannah. The remaining land holds semi-deciduous forest or disturbed vegetation. Although there is controversy over the classification, the non-forest areas resemble Campinarana formations.[3]
