Knowledge hub Films Watch how sand dams work Sand dams are transforming lives around the world. But how do they work? Find out in this animation. This film is also available with subtitles in: Arabic French German Hindi Kamba Malagasy Portuguese Spanish Please donate what you can and empower women and girls to shape their own futures with sand dams Please select a donation amount (required) £30 could provide a dryland farmer with drought-tolerant seeds, to grow a reliable source of fresh food for their children £60 could provide a community with a roll of barbed wire, to reinforce and strengthen their sand dam during construction £100 could provide 500 tree seedlings and a spray pump, to protect the trees from insects Other Set up a regular payment Donate Manage Cookie Preferences