Masterdrain - the program for quick and efficient surface water / storm drainage design . Rainfall rates are calculated from hydrological data available from the database or from the Wallingford maps, and the system is sized by the Modified Rational method developed by H R Wallingford. Full hydraulic data is available for each pipe section. Further details may be obtained by clicking on the links to the left.

Masterdrain Foul has been produced in answer to the demand for a quick and easy to learn design program for foul drainage. It incorporates many of the features of the surfacewater program, plus, of course, those that are specific to foul drainage design. Discharge units are available for BS EN 12056, and flows may also be calculated on a 'per head of population' basis. Further details of this program may be obtained by clicking on the links to the left.

Masterdrain Hydrology enables the user to quickly obtain the hydrological constants required for designing surface water drainage systems using MasterDrain or similar programs. It contains a database of over 4400 UK entries, and also has a full set of Wallingford maps (reproduced by permission of H R Wallingford Ltd) to allow the user to derive values that are not available in the database. It plots rainfall graphs, roof protection calculations and many more functions. Further details of this program may be obtained by clicking on the links to the left.

I.E. version 7, under XP/Vista may restrict this file, preventing the links from working.