The Nyanga ands more specifically the Moukalaba-Doudou National Park region have very diverse landscapes that alternate primary and secondary forests, grassland or dense bush savannas, rivers, ponds, swamps and raphia or papyrus forests. The Nyanga River - whose basin irrigates forests and savannas - runs through the region as well as many rivers among which the Moukalaba that runs through Doussala.
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This ecoregion, with few water bodies and rivers, represents the most arid part of the Transcaspian area. The arid rivers are characterized by low flow, uneven regime, and considerable fluctuations in the intensity of flow in the off-season. The fauna of inland water bodies is impoverished and mainly contains species that migrate or occasionally enter from the sea.