Français
7. Stormwater – Elements for calculating rainfall
7.1 Base data: ten-year rainfall
Since the primary characteristic of atmospheric precipitation is irregularity, the quantity of rainwater to be evacuated must be determined more or less empirically. Collectors must be able to evacuate rainwater under certain self-cleaning and filling conditions.
The flow rates to be taken into account when calculating cross-sections are based on a ten-year rainfall, corresponding to the highest rainfall recorded in the last ten years. In the event of a higher rainfall, it is assumed that the collector will flow backwards and be unable to absorb the excess inflow. This basic data (ten-year rainfall) is weighted by coefficients corresponding to the nature and morphology of the basin. This results in two practical values for...
The Ultimate Scientific and Technical Reference
This article is included in
Finishing work and technical packages
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Stormwater – Elements for calculating rainfall
Normative approach
Bibliography
Also in our database
Legislation
Law 2006 – 1772 of December 30, 2006 on water and aquatic environments
Health regulations
Regulations
Public Health Code Articles R1321-1 to R1321-66, D1321-67 and D1321-68
Code des collectivités locales – Articles R2224-6 to R2224-22-6
Code de la construction et de l'habitation – Articles L135-1 et R135-1 – Chapter V: Saving water consumption in buildings
Decree no. 2007-49 of January 11, 2007 on the safety of water intended for human consumption...
Standards
- Technical specifications for water installations for human consumption inside buildings – Part 1: General information - NF EN 806-1 - juin 2001
- Technical specifications for water installations for human consumption inside buildings – Part 1: General information - NF EN 806-1/A1 - décembre 2002
- Technical specifications for water installations for human consumption inside buildings – Part 2: Design - NF EN 806-2 -...
The Ultimate Scientific and Technical Reference
