The flood alert, for the Llynfi and Ogmore catchments, follows a weather warning from the agency.

BBC: Wales weather: Flood alert as heavy rain forecast

Mostly semi-arid, arid or desert, the country depends for its water on scattered catchments in highland areas.

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The HELP initiative has established a global network of catchments to improve the links between hydrology and the needs of society.

UNESCO: Indigenous Peoples

Charity: water counts the number of wells dug and rainwater catchments built.

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These range from planting mangroves to increase water catchments in high flood regions to providing low-cost risk transfer methods to farmers in developing countries.

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There is a need for a targeted action to collect soils, rainfall and river flow data in the Pakistani catchments especially in the upper Indus above Tarbella and the Kabul River.

UNESCO: NATURAL SCIENCES