A Case Study of Okavango Basin
According to the Permanent Okavango River Basin Water Commission (OKACOM) the Okavango River rises in the headwaters of the Cuito and Cubango-Okavango Rivers in the highland plateaus of Angola. The river is drained by Cubango (referred to as Kavango in Namibia and Okavango in Botswana), Cutato, Cuchi, Cuelei, Cuebe, Cueio, Cuatir, Luassinga, Longa, Cuiriri and Cuito Rivers and the Okavango Delta. Flowing from the Angola highlands the Cuito and Cubango Rivers meet to form the Cubango-Okavango along the border of Namibia Angola before flowing through the panhandle to into the Okavango Delta in Botswana.
Current and future challenges
While Okavango is one of the least ‘developed’ river basins in Africa, there is an increasing pressure to develop the basin’s resources (Nicol, 2003).The fact that Okavango is a shared water resource between Angola, Botswana and Namibia means that each country not only has to deal with internal water challenges but also with trans-boundary water challenges as well. In addition it is a Ramsar site with rich biodiversity which has attracted international concerns bringing in stakeholders beyond the riparian countries (Peter Ashton, Public involvement in water resource management within the Okavango River Basin, 2005). These current and future challenges are discussed below in detail:
Population Dynamics: The present population in the basin is 921,890 and is projected to increase to 1.28 million people by 2025 with 62% living in Angola, 16% in Botswana and 22% in Namibia (Commission, 2011). The increase in urbanization partly because of the high population growth all around the basin presents a new challenge in meeting the present and future demand for water and sanitation. For example the centre of Rundu in Namibia is growing at a rate of 2.5% compared with the growth of 1.5% per annum in the rural areas of Kavongo. In 2009-2010 the Kavongo region was subject to severe flooding which was attributed to the increased population in the floodplains in Caprivi and Kavango and development of infrastructure (rail, road) that interfered with the natural flow of the river.
The Namibian and Botswana sectors of the Okavango catchment represent a relatively arid environment and most communities tend to be located close to the available water resources. This concentration of human activities in close proximity to the water resources of the Okavango River and the Okavango Delta represents a growing dependency on these resources and could represent a potential threat to the ecological integrity of these systems if resource exploitation patterns are not carefully balanced by resource protection (Ashton & Neal, 2003; Turton et al., 2003).
Climate change: an analysis of projected climate change effects predicts a rise in the temperature and rainfall in the basin. Higher temperatures of 2.3°C-3°C will affect the Southern basin more than the North with increasing evaporation. There is also a projected rise in rainfall of 0-20% with the greatest effect on the North (Commission, 2011). During the dry season an increase in evaporation may exceed the inflow from the catchment causing drier conditions whereas there would be increased flooding during the wetter seasons downstream. This presents a current and future challenge for the riparian countries. A collaborative study by Sweden, South Africa and the UK showed that the flow of the river would decrease by 26% by 2100 under the A2 scenario and 17% under the B2 scenario.
International interest on the river basin: Okavango River Basin is a Ramsar site and therefore attracts a lot of international interest. The interest from international groups in protecting the wetland conflicts with some of the development plans for the three states. For example Angola was not able to secure funding for a dam along the Okavango River because of the fact that it is a Ramsar site.
Land use change: there is an increased demand for land for crops along the river basin from the Angolan highlands and with the projected population growth the demand will only increase. There are expansive agricultural irrigation activities in Angola (15,000 ha) and Namibia (338,000 ha) along the basin which translates into the use of fertilizers and pesticides posing the danger of eutrophication and surface and ground water contamination from the use of pesticides. There has been proof of decline in forest cover over the last 25 years which affects the hydrological regime of the basin. Livestock numbers are expected to increase substantially in Angola and Namibia leading to overgrazing and encroachment. This will result to higher levels of erosion resulting to siltation which affects the water quality for those who are downstream. This will result to higher levels of erosion resulting to siltation which affects the water quality for those who are downstream.
Conflict in Angola: Following the signing of the peace accord in Angola between the Government of Angola and the leaders of National Union for the Total Independence of Angola (UNITA) in 4th April 2002 it is clear that the country needs to rehabilitate all its resources for economic growth after 30 years of civil war. In the pursuit of economic growth the Angola government will seek to develop the country’s hydropower capacity and agricultural irrigation schemes (Peter Ashton, Public involvement in water resource management within the Okavango River Basin, 2005) and increased urbanization and industrialization will also put more pressure on the water resource. This presents a problem for those living in the lower Okavango basin since it will mean construction of hydro dams, irrigation pipeline schemes and water treatment infrastructure will have to be laid out.
The Angolan portion of the Okavango basin contains some of the most remote and sparsely populated portions of the country. However, this region was a UNITA stronghold and some of the most ferocious battles of the civil war were fought here. A large number of mines have been laid along all of the roads and encircling each urban centre, as well as along many parts of the border with Namibia and at all bridges and river crossing points. As a result, road travel and access to the towns in the catchment (Menongue, Longa, CuitoCanavale, Mavinga, Savata and Caiundo) is extremely dangerous and air transport to Menongue remains the most reliable means of access to the catchment (Dr Chris Brown, CEO: Namibia Nature Foundation, personal communication, 12 May 2003).
The long civil conflict in Angola prevented the collection of data in the basin region and the participation of local communities concerning the utilization of the basin (Mbaiwa, 2004). This is contrary to Namibia and Botswana where stakeholder participation is encouraged. The lack of data availability from Angola makes it very hard for the riparian countries to coordinate their planning and management efforts of the Okavango basin. The prolonged period of war in Angola also means that communication systems are not developed compared to Namibia and Botswana.
Communication challenge: The cultural, linguistic diversity of the communities living along the basin poses another challenge in data collection and carrying out of research. According to the Summer Institute of Linguistic 2002, there are 13 different indigenous languages as well as five official languages. This represents a challenge in communication and the ability to incorporate the different cultural beliefs in water resource management in the three basin states.
Poverty: Unequal distribution of wealth in the three countries is partly to blame for the poverty level along the basin and so is the remoteness of the basin area. The majority of those living along the basin rely on natural resources to meet their needs through fishing, agriculture, charcoal burning and livestock keeping all of which have an impact on the vegetation cover and consequently on the water quality. If the trend remains the same the pressure on natural resources in Angola will increase nearly by 50% and by about 25% in Namibia and Botswana (Commission, 2011). This will result into further degradation and loss of wetland and forest cover.
Weak institutions: The establishment of the Permanent Okavango River Basin Water Commission (OKACOM) in 1994 as a coordinating organization that acts as the technical advisor to the three member states regarding conservation, development and use of water resources of mutual interest was a step in the right direction. Unfortunately, OKACOM has no legal authority, suffers from inadequate financing and has no enforcement mechanisms and each country maintains full sovereignty over its water rights. The commission is therefore unable to fulfill its mandate.
In conclusion, the trans-boundary development and management challenges faced in the Okavango River Basin are not unique to it but are reflected across Africa with other shared water resources. The three states need to come to a consensus on how the Okavango River Basin will be managed and allow OKACOM to carry out its mandate independently in order to sustainably and equitably achieve social and economic development without compromising the environment. Different stakeholders local, national, regional and international need to be fully involved in planning and management of the basin if any meaningful gains are to be made in the protection and management of this water resource.
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