Assessment of Infiltration from Private Sewer Laterals: Case Study in Jurmala, Latvia

The presence of excess water in centralized sewerage systems is known to have a multitude unfavorable effects on the daily operation wastewater infrastructure. additional volume I/I-water decreases hydraulic capacity collection networks, reduces efficiency treatment processes, and increases costs transporting treating wastewater. Currently, most I/I studies Latvia are conducted scale plant service area determine only common performance indicators for given year. However, data such resolution not sufficient identify problem areas within networks introduce cost-effective measures. contribution private sewer laterals overall an particular interest. Although it possible locate quantify from individual house connections, practice, financial time constraints, feasible apply case-by-case approach. Thus, simple method predetermine problematic parts system before conducting on-site inspections needed. This study investigates link between groundwater levels observed night-time flows sub-catchment by performing linear regression analysis (940 points total). results show direct correlation (R > 0.70 all cases) said parameters highlight impacts poorly built ill-maintained connections. presented approach can be widely adopted operators help potential sources diluted aid development priority-based renovation plans.