Try to establish links with ...
Published by Lucky Chikaura, Environmental Health / WASH Focal Person at World Health Organization
Try to establish links with particular catchment councils for the respective area you intend to map, it looks like there is some kind data available for such, for example the transboundry water management for middle Zambezi reiver course is managed by the Zambezi River Authority, only between Zimbabwe and Zambia. For the greater Zambezi river basin there is much work to do. Water audits is still a long way to go for some catchments due to lack of finance, infrastructure and strong mechanisims to manage.