Sand Dams Worldwide - Sand Dams in Kenya скачать в хорошем качестве

Sand Dams Worldwide - Sand Dams in Kenya

Sand Dams Worldwide (formerly Excellent Development) works with community self-help groups in semi-arid Africa to improve their environment sustainably. Effective soil and water conservation enable improved water supply, food security, health and incomes. Find out more about sand dams here: https://www.excellentdevelopment.com/... Sand dams are a key technology to improve water supply in semi-arid regions. A sand dam is a reinforced concrete wall built across seasonal river beds. Over one to three seasons, the dam fills up with water, then sand, which filters water clean and protects it from evaporation and parasites. About 40% of the volume behind the dam is water, meaning that sand dams up to 40 million litres of rainwater. Sand dams are combined with land terracing and tree planting to improve the conservation of both soil and water, enabling farmers to grow more food on their land. This holistic approach to development creates a positive cycle of improvement which allows people to change their lives sustainably, moving away from a situation where water and food are in short supply, towards water and food security.