Bui

Bui National Park spans the border between Bono Region and Savannah Region in central-western Ghana, covering approximately 1,821 square kilometers along the Black Volta River. Established in 1971, the park gained international attention when the Bui Dam hydroelectric project flooded a significant portion of its core area beginning in 2013, inundating approximately 20% of the park's land area. Bui protects Guinea savanna and transition forest habitats and is especially notable for its population of the critically threatened black-and-white colobus monkey, which represents one of the largest remaining groups in Ghana. The Bui Reservoir created by the dam has altered the park's ecology substantially.

Bui is Ghana's most important site for the black-and-white colobus monkey, with a population concentrated in riparian forest along the Black Volta that survived the dam flooding. Other primates include baboon, patas monkey, and green monkey. Hippopotamus are present in the river and the reservoir. Elephant, lion, leopard, and kob have been recorded, though large mammal populations have been severely reduced by poaching over decades. Nile crocodile inhabit both the river and the reservoir. The park's avifauna includes notable waterbirds using the expanded reservoir habitat and savanna specialist species in the interior.

Bui's vegetation is a mosaic of dry semi-deciduous forest, Guinea savanna, and riparian forest. The dry forests in the park's northern sections contain Khaya senegalensis, Isoberlinia doka, and Daniellia oliveri. Riparian forest along the Black Volta and its tributaries provides the densest tree cover and is the critical habitat for colobus monkeys. The creation of the Bui Reservoir has transformed the landscape, creating extensive open water and flooded riparian zones that support waterbird communities but have eliminated terrestrial habitats. Grassland and savanna occupy the drier interior portions of the park.

The park lies on the Precambrian Birimian formation of central Ghana, composed of metamorphic and volcanic rocks. The Black Volta River, which forms the boundary with Côte d'Ivoire along much of the park's western edge, has carved gorges through these ancient rocks. The Bui Gorge—now partially flooded—was a dramatic geological feature with exposed Precambrian rocks. The dam structure was built exploiting a constriction in the Black Volta gorge. Soils across the park range from sandy, lateritic soils in the savanna to heavier clay soils in the riparian zones.

Bui experiences a sub-humid tropical climate with a single main rainy season from April to October and a dry season from November to March. Annual rainfall averages 1,000–1,200 mm. The harmattan brings dry, dusty winds and reduced humidity from December to February, lowering daytime temperatures and creating cooler nights. The dry season is optimal for wildlife viewing as vegetation thins and animals concentrate at the river and reservoir margins. Reservoir water levels vary with seasonal rainfall and hydroelectric release decisions, affecting the park's water-dependent wildlife.

The Black Volta region has been inhabited by Brong, Nafana, and other groups who practiced farming and fishing along the river. The area was part of the Brong-Ahafo region, situated between the Ashanti heartland to the south and the savanna states to the north. The construction of the Bui Dam—approved in 2005 and completed in 2013—required the resettlement of approximately 1,200 people from villages within the dam's flood zone. The dam's impact on the national park was a subject of significant international conservation debate prior to construction.

Bui was established as a national park in 1971, primarily to protect the Black Volta riparian ecosystem and the colobus monkey population. The announcement and construction of the Bui Dam between 2005 and 2013 significantly impacted the park's ecology and generated international opposition from conservation organizations. The dam flooded approximately 20% of the park's area, including critical riparian habitats. Post-dam management has focused on monitoring colobus populations and adapting conservation strategies to the modified landscape. The Bui Power Authority and Ghana's Wildlife Division have a co-management relationship for the park.

The Bui Reservoir offers boat excursions that provide opportunities to observe hippos, crocodiles, and waterbirds in a scenic setting. The colobus monkey watching in the riparian forest remnants is the park's signature wildlife activity. Game drives in the savanna sectors target kob, baboon, and occasionally elephant. The remnant sections of the Bui Gorge accessible by boat from the reservoir are a distinctive geological attraction. The park headquarters near Bui village serves as the main visitor entry point accessible from Techiman.

Park headquarters is located near the Bui Dam site, approximately 70 km from Techiman in Bono Region. The access road from Techiman is partially paved. Accommodation options near the park include a basic rest house at the park and facilities in Techiman. Boat hire for reservoir excursions is available through the park. Entry fees and guide fees are payable at headquarters. The dry season from November to March is recommended for wildlife viewing. The Bui Dam visitor center also provides information about the hydroelectric project.

Bui National Park faces the dual challenge of recovering from the dam flooding while managing ongoing threats from agricultural encroachment, bushmeat hunting, and fishing within the park. The reservoir has attracted fishing communities that have settled along its margins, creating pressure on the park's resources. Colobus monkey monitoring suggests the population has survived the flooding, though habitat quality has been compromised. International conservation organizations have advocated for stronger management of the park's remaining undamaged habitats. The park represents a case study in the conflict between development infrastructure and biodiversity conservation.