Drainage Design Report

Drainage Design Reports

Efficient drainage design and stormwater management are critical requirements in the design and planning stage of urban development. Whether it is a commercial mixed-use residential development or a commercial establishment, drainage design and stormwater management should take a crucial role in the planning and implementation process. Unfortunately, this aspect of construction and design is often seen as a subsidiary issue, and will only get the attention during the latter part of development. This should not be the case at any construction site or development. To ensure that the appropriate drainage design is implemented, it is expected that stakeholders should obtain a drainage design report. A drainage design report will detail the current issues, site analysis and presentation of recommendations and potential alternative, if necessary.

What is Included in the Drainage Design Report?

Poor drainage design can cause a range of site problems including flooded walkways and boggy lawns, which can compromise the building’s foundations. The effects of poor drainage design are not just unsightly; poor drainage can also compromise the structural integrity of the property. To prevent potential damages on the foundations and destruction on nearby structures, a drainage design report should be in place.

A drainage design report will include a site analysis, potential effects on adjoining properties and recommendations. The site analysis will include a topographical description since it is recommended that flood waters should be gravity-drained to the gutter or available flood control system. It will also include the identification of natural watercourses, drainage easements and flood-prone land. The report will also consider the local soil conditions since this will have an effect on how the floodwater will drain.

A complete and detailed design of the drainage system will be included in the report. The detailed design of the drainage will normally include a section on conduit design and the materials that will be used, pit design, stormwater discharge and reserves and easements. The report will come complete with all the necessary pictures and illustrations. Property owners and other stakeholders can also count on a Conclusion or Recommendation in every drainage design report where a competent authority out forward some recommendations on how to improve the current design of the drainage. Should there be changes in the design or additional construction, the plan should subscribe to the Building Code of Australia, including AS/NZS 3500.3 Stormwater Drainage and AS/NZS 3500.5 Domestic Installations, Section 5 Stormwater Drainage.

 

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