@abachmann

Simplified estimation of groundwater-sewer interactions - Comparing GIS operations and modelling

, , , , and . 10th International Urban Drainage Modelling Conference, Québec, Kanada, (2015)

Abstract

Sewer systems are an important part of modern urban infrastructure. Structural integrity including water tightness of urban sewer systems has to be guaranteed to protect humans and environment, but rehabilitation of defective sewer systems can lead to critical groundwater rises in urban areas. This paper presents a methodical study comparing a numerical groundwater modelling approach to simplified GIS (geographic information system) operations to identify sewer pipes in risk of causing groundwater level rises as a consequence of sewer system rehabilitation (hereinafter referred to as critical pipes). Based on the results conclusions are drawn as to which extent critical pipes can be identified without groundwater modelling. Different geostatistical interpolation methods did not have a major influence on the interpolated groundwater table. First results indicate that critical sewer pipes can be successfully identified by the simplified GIS methodology.

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