Introduction... The Water Administration System (WAS) is an integrated management tool for irrigation schemes that delivers water on  demand through canal networks, pipelines and rivers.  The WAS program is currently in use at all the major irrigation  schemes and a number of smaller irrigation boards throughout South Africa. Application areas WAS is an integrated database driven system with many water management capabilities.  WAS can be implemented in a  small water office that manages a few abstractions and measuring stations up to a CMA level that manages thousands of  abstractions and measuring stations.  WAS is used for the efficient administration of: ●  Address information. ●  Scheduled areas. ●  Water quota allocations. ●  Water delivered through pressure-regulated sluice gates, measuring structures and water meters. ●  Water transfers between users (Automatic and manually). ●  Water use calculations for planted areas based on crop water use data. ●  Date and time related flow data collected from electronic loggers or mechanical chart recorders. ●  Discharge tables (DT) to do conversions between water depth and flow rate for measuring structures or visa versa. ●  List of rateable areas (LRA) information. ●  Calculation of scheme water balances. ●  Calculation of water releases for water distribution through canal networks, pipelines and rivers taking lag times, evaporation, transpiration and seepage into account. ●  Billing system that links to water use information. ●  E-mail invoices in pdf format. ●  Flexible tariff sets based on water usage, a flat rate or scheduled area. ●  Images and photos that can be linked to different types of information in the database. ●  Bulk SMS system.