Flooding Gallery

French Religious Wars 1562-1598. Siege of Poitiers 24 July-7 September 1569. Huguenots

French Religious Wars 1562-1598. Siege of Poitiers 24 July-7 September 1569. Huguenots under Gaspard de Coligny (1519-1572) besieged the city but the defenders held them off with the aid of heavy artillery and a small troop of cavalry, and by flooding meadows. Engraving by Jacques Tortorel fl1568-1590) and Jean-Jacques Perrissin (1536-1617) from their series on the Huguenot Wars c1570

© Universal History Archive/Universal Images Group

Measuring water levels

Water level recorder in a river, being adjusted by a scientist. It uses float activation of a gearing assembly to move a pen across a chart drum. The chart drum is driven by a spring-wound clock. Depending on the application and choice of clock cycle, instruments can be left unattended for up to one month of continuous recording of water level variations. Recording of water levels can help monitor the relationship to rainfall and the amounts of sunlight. Action can also be taken if the water levels are dangerously high or low

© PAUL RAPSON/SCIENCE PHOTO LIBRARY

Channels and lakes during sunset in

Channels and lakes during sunset in the Danube Delta, Romania. Big willows, alder and ash trees from a riparian forest along the channels. Most of the Danube delta is protected by the biosphere reserve, national park, Ramsar, and UNESCO. Date: 29/11/2008

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