The cost-oriented and sustainable operation of sewer systems requires a comprehensive knowledge about the infiltration situation in the catchment. Owing to the high expenditures for infiltration measurements a reliable transfer of measurement results to other sewer sections would be highly beneficial. Assuming a functional relationship between sewer characteristics and infiltration rates can be identified, such a transfer can be realised by means of classification techniques. In this paper a method is introduced which is based on discriminant analysis and which allows for a transfer of measurement results to similar sub-catchments. The method was applied using two data sets with measured or virtual infiltration rates. It yields acceptable results as a total fraction of 50% to 75% of the investigated sub-catchments was assigned correctly. Furthermore, additional information to assess the results was provided. The quality of the transfer results depends strongly on the homogeneity of the considered sub-catchments. Due to this restriction the practical applicability of the method is restricted. Nevertheless, it might be used as a screening procedure for planning of effective detailed infiltration investigations.
Research Article|May 01 2008
The transfer of infiltration measurement results to other sewers by means of discriminant analysis
Water Sci Technol (2008) 57 (9): 1429-1435.
Torsten Franz, Peter Krebs; The transfer of infiltration measurement results to other sewers by means of discriminant analysis. Water Sci Technol 1 May 2008; 57 (9): 1429–1435. doi: https://doi.org/10.2166/wst.2008.302
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