ak 3.1-3.4

Glossary of terms

3.1 Water in motion

fresh water (zoet water) - water with a low concentration

of dissolved salts, for example drinking water

groundwater (grondwater) - water that is no longer visible because it has infiltrated into the ground and in rock

land ice (landijs) - masses of ice which are on land ocean current (zeestroom) - movement by the wind of a large mass of seawater in a fixed direction

salt water (zout water) - water with a high concentration of dissolved salts, for example sea water

surface water (oppervlaktewater) - water that is visible

such as lakes, fens, rivers and seas

3.2 Water in balance

aquifer (aquifer) - layer that holds water underground fossil water (fossiel water) - water under the ground that

dates back from ancient times

infiltration (infiltratie) - water seeping into the ground non-renewable water resources (niet-vernieuwbaar water) - water that is not, or very slowly replenished which means that it is going to run out (an aquifer for example)

renewable water resources (vernieuwbaar water) - water that is replenished at the same rate that it is being used sustainable water management (duurzaam waterbeheer)

- water management in which renewable water resources are used

useful precipitation (nuttige neerslag) - the difference between precipitation and evaporation (the water that is left)

water balance (waterbalans) - the amount of water that

goes into and out of an area

3.3 Sometimes too much

hurricane (tropische orkaan) - a tropical storm with wind

speeds over 200 km per hour

peak discharge (piekafvoer) - time of the highest river

channel level

soil subsidence (bodemdaling) - sinking of the ground

3.4 Often too little

economic water scarcity (economisch watertekort) - with an economic water scarcity, too little has been invested to get the available water to the people

physical water shortage (fysiek watertekort) - there is too little water in an area to meet the needs of the people without disrupting nature

water stress (waterschaarste) - all the problems that arise as a result of a shortage of clean drinking water water war (wateroorlog) - an armed conflict over water between population groups within a country or between