Utilization of spatial data in combined sewer systems level measurement
Norontaus, Maija (2019)
All rights reserved. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Julkaisun pysyvä osoite on
The purpose of this thesis was to find out, can spatial data be utilized to find suitable measuring points for water level measurements in combined sewer system. This project was carried out in co-operation with Helsinki Region Environmental Services Authority and the area that was processed in this work was combined sewer system area of the capital region. Level measurements are one way of monitoring the operation of sewer system; measurements can provide information on combined sewer system overflows and the condition of the sewer network. Measurements are often made by devices, that can be sensitive to changes in sewer conditions. Based on spatial analyses and selections made in this work, the goal was to find good measurement points for level measurements. The aim of this thesis was also to find out, whether similar measurement points can produce similar measurement data. The project proceeded according to following steps: definition of catchment area features on combined sewer system area, presenting an example of suitable measuring points based on spatial data analysis, and carrying out two test measurements. The results of this work showed that spatial data can be used to make assumptions about water level behavior in the sewer network. However, assumptions should be validated by doing more level measurements. In the future, it could be further investigated which factors have the greatest impact on level measurement. Spatial data definitions made for this thesis can be utilized in combined sewer systems modelling.