NA-05 - Cleaning: Cleaning Strategy and Programme

Table of contents

Determination of cleaning intervals

System and Network data

The review of the existing system data should include all available network data.

 
Table: 
Content of a sewer database adapted from [DWAM145:2013] (Example)
Inventory data Attributes
Key data Master data Status data Operational data Hydraulic data Cost data
Street location Year of construction/completion
Inspection date
Maintenance interval
Catchment area
 As per: DWA-A 133
Section and manhole number
 Section length Type of inspection
Date of last maintenance
Sealing factor
Flow direction
 Invert gradient
Reason for inspection
Quantity and type of deposit
Population density
 ---
Regional area
Type of sewer (combined water, wastewater, precipitation water, etc.)
Condition
Wastewater quality
Observed backup level
... ... ... ... ... ...

 

/ 91