• Source Control/Storage Design - storage design with infiltration (optional) is often required in drainage networks to reduce the volume and rate of runoff. Thousands of permutations of soakaways, lakes, tanks, swales, detention basins, porous car parks maybe chosen and optimised. A design guide takes you  step by step through the procedure. The quick storage estimate facility is invaluable for examining feasibility or validating designs.
• Simulation - the network, designed in Storm and Schedules, is passed for this final stage of hydraulic analysis to Simulation. To test the ultimate capacity of the system it must be surcharged to the point of flooding. In order to achieve this Simulation allows extreme rainfalls to be analysed. Pipes that have been sized for working loads (pipe full conditions) of between 1 and 5 years RP in Storm should be tested for return periods in the range of 20 to 30 years in Simulation. Storage and SC devices can also be dragged and dropped onto the network for a fully integrated analysis.
• APT - the network must be tested for a wide range of winter and summer rainfall. The use of storage and SC structures may increase the duration of critical events. Although winter storms are less intense, the volume of winter runoff must be considered. In addition, the effects of climate change could be critical and it is now possible to evaluate and mitigate its possible impact. It is also important that the engineer thinks beyond the design specification of the system e.g. no flooding for 30 year RP. Failure modes must be examined. A system that is OK for a 30 year RP storm but fails catastrophically for 30 years RP + 5% is an unsatisfactory design. In the event of failure flood flow paths should be illustrated. Sensitivity analysis is made simple with APT. All these functions, together with audit facilities, are provided in the Advanced Productivity Tools. Hundreds of scenarios may be simulated in one run and their impacts summarised in clear reports with critical analysis.
• CASDeF - if controls need to be adjusted or storage redesigned and distributed then CASDeF can do it. It will run any number of simulations to automatically size controls and storage. CASDeF provides the most efficient means to examine options and alternative designs.

For more information about Micro Drainage please contact Causeway.