World Heritage Committee Dilutes Reaction to Batoka Gorge HydroElectric Scheme

Keep Victoria Falls Wild, 27th September 2023

- South Africa successfully propose amendments diluting Committee decision

- Committee diverted from recommendations of Reactive Monitoring Mission

The World Heritage Committee at its 45th Conference Session, held at Riyadh in the Kingdom of Saudi Arabia over 10th-25th September 2023, turned its attention to issues affecting the Victoria Falls World Heritage Site (VFWHS) in a discussion held on 13th September (available to view on the UNESCO World Heritage website here (1:52:10 to 2:33:25)). 

Members of the Committee discussed the draft decision text prepared by the World Heritage Centre and IUCN (UNESCO, July 2023) and amendments to the text which were proposed by the South African delegation (UNESCO, August 2023). Both South Africa and Zambia are currently members of the Committee.

The Committee’s concerns mainly focussed on the proposed Batoka Gorge Hydro-Electric Scheme (BGHES), jointly proposed by the State Parties of Zambia and Zimbabwe, and potential impacts of the project on the Outstanding Universal Values (OUV) of the VFWHS, which includes a section of the gorges extending some 12 km downstream as well as the Falls themselves and a section the river extending some 15 km upstream.

Map showing flooding of the Batoka Gorge from the proposed 
Hydro-Electric Scheme (click for larger view)

Before the Committee debated the proposed amendments, the World Heritage Centre Secretariat presented an opening statement highlighting direct threats to the Site from the Batoka Gorge Hydro Electric Scheme (BGHES).

“On the issue of the Batoka Gorge Hydro Electric Scheme which is referred in paragraph 4 - we would like to note that following review of the documentations from the State Parties, the WHC and IUCN have assessed that the reservoir area of the electric scheme will extend approximately 10.75 km into the property at full supply level which at deepest point will increase the water level in the property by around 43 m. During the dry season it is reported that the reservoir level  will be lowered, which will reduced the flooded area by 5 km. This means that during the dry season still 5.75 km of the gorge inside the property will remain with the higher water level.

“The project will therefore alter the unique gorge ecosystem and water flow and could potentially impact on the ecological values of the property as defined in its statement of OUV.

“The World Heritage Centre therefore considers that the property should not proceed as currently proposed but should be further revised together with the Environmental Impact Assessment to assess alternative project designs that would avoid these impacts on the property and include a comprehensive ecological assessment of the gorge ecosystem.”

In their statement on their proposed amendments the representative for South Africa informed the Committee:

“The State Party of Zambia has taken utmost care to avoid any possible impacts on the OUV through the selection of an alternative that has no likelihood of undermining the integrity of the site. The chosen alternative clearly shows the tail of the backflow of the reservoir waters will only be located in gorges, with a potential water level rise of only 25% maximum, and as such no flooding of the gorges. And therefore no negative impact on the attributes of the OUV.”

The statement appears to contradict itself by saying the backflow will include the gorges (within the WHS) but that there will be “no flooding of the gorges,” and the claimed “potential water level rise of only 25% maximum” appears to make limited sense without further context. 

The representative from Zimbabwe also encouraged the Committee to support the project.

"The establishment of the BGHES will contribute to the partial fulfilment of the national obligations under the Paris agreement following the UN... COP decision to encourage third parties to promote clean energy production whilst reducing and eventually eliminating fossil fuels that are exacerbating climate change and have negative and significant implications on the hydrology of the Zambezi river.

"At present the average of 50 percent of our populations both in Zambia and Zimbabwe lack access to electricity, and ...the investment in clean energy is necessary, and in joint efforts...  our governments remain committed to religiously implement recommendations of the E S I A prepared for this project.

"Given these submissions, Chair, together with Zambia we pledge to continue preserving the integrity of the property whilst ensuring that livelihoods surrounding communities are enhanced through sustainably designed programmes and ensuring that the ecosystems inhabited are preserved to protect the OUV of the property."

The Committee then discussed and considered the various amendments, with the Japanese delegates, in particular, raising concerns over the shift of emphasis away from the request for a comprehensive ecological assessment of the project’s impact on gorge ecosystem environment, instead placing the emphasis on a geomorphological and/or geological assessment.

Google satellite image of the Batoka Gorge (click for larger view)

A detailed ecological study of the gorge ecosystems is essential if the impacts of this development are to be understood. For example the fish communities of the middle Zambezi River system reflect not only the fast-flowing rapids of the gorge system but also a complex regional geomorphological history of major river course changes and river captures, with the Victoria Falls acting as a geographical barrier to the movement of fish and resulting in geographically isolated fish communities downstream of the Falls. Geomorphological evidence has resulted in several theories on the time-scales in the evolution of the Falls and gorge system and the study of comparative fish faunas and species clines has helped refine these theories (Kramer and Van der Bank, 2011). There is still potentially much more that can be learned from the study of the unique fish communities of the Batoka Gorge before they are lost under the waters of the BGHES.

It should be noted that the gorge systems of the middle Zambezi downstream are already significantly affected by the Kariba Dam, and that the BGHES will not only affect the natural river-flow above the dam, but also downstream, effectively modifying the remaining natural sections of the gorge environments. An alternative location, in the Devil’s Gorge, downstream from the Batoka Gorge and above Kariba, would at least leave the Batoka Gorge as a last natural example of the once extensive gorge ecosystems.

Despite the issues raised in the joint World Heritage Centre/IUCN Reactive Monitoring mission report, opening statements from the World Heritage Centre and IUCN and concerns raised by the Japanese delegation, the Committee adopted the amendments suggested by South Africa. The amendments removed a specific request “to assess alternative project designs that will not impact the OUV.”

The amendments effectively remove all the recommendations resulting from the Reactive Monitoring Mission to the Site, undertaken in February 2022 (UNESCO, June 2023), undermining efforts of their own advisory bodies to improve the protection of the Site.

References

Kramera and Van der Bank (2011) The Victoria Falls, a species boundary for the Zambezi Parrotfish, Cyphomyrus discorhynchus (Peters, 1852), and the resurrection of Cyphomyrus cubangoensis (Pellegrin, 1936). Journal of Natural History, Vol.45, Nos.43-44, November 2011, 2669–2699. [Available to download from the KVFW website here.]

UNESCO (June 2023) Mosi-oa-Tunya/Victoria Falls Reactive Monitoring Mission (February 2022) Final Report. [Available to download from the UNESCO World Heritage website here.]

UNESCO (July 2023) Item 7B of the Provisional Agenda: State of conservation of properties inscribed on the of World Heritage List (WHC/23/45.COM/7B.Add). [Available to download from the UNESCO World Heritage website here.]

UNESCO (August 2023) 7B Amendment/Proposal 45 COM 7B.10 Submitted by the Delegation of South Africa, 26th August. [Available to download from the UNESCO World Heritage website here (direct download).]

Further Information

Read more on the background to the Batoka Gorge HydroElectric Scheme on the Keep Victoria Falls Wild website.