<\/p>\n The duck pond is an artificially created body of still water<\/strong> in the Herne-S\u00fcd district. It is mainly fed by groundwater and rainwater. Low water levels and a critical lack of oxygen occur regularly, especially in the summer months. The consequences: Fish die-offs<\/strong>, unpleasant odors and a significant decline in recreational value for local residents. <\/p>\n The feasibility study aims to reduce the effects of eutrophication through measures to improve water quality. To this end, both short-term and medium to long-term effective interventions were designed. <\/span><\/p>\n The following steps, among others, were carried out for a well-founded evaluation:<\/p>\n Analysis of historical and current maps<\/p>\n<\/li>\n Soil and groundwater-related site assessment<\/p>\n<\/li>\n Measurement of the river bed<\/p>\n<\/li>\n Water sampling including chemical analysis<\/p>\n<\/li>\n Camera inspection of the inlet pipes<\/p>\n<\/li>\n<\/ul>\n Based on these surveys, various options for stabilizing the water balance<\/strong> were developed and evaluated with regard to ecological and technical aspects.<\/p>\n The concept envisages a staged implementation, depending on the success of the initial measures:<\/p>\n Establishment of continuous water monitoring<\/strong><\/p>\n<\/li>\n Regular water maintenance for sediment control<\/p>\n<\/li>\n Renovation of the DN 50 inlet pipe<\/p>\n<\/li>\n<\/ul>\n Integration of roof surface drainage<\/strong> to raise the water level<\/p>\n<\/li>\n Installation of an aeration system<\/strong> to increase oxygen input<\/p>\n<\/li>\n<\/ul>\n Other options investigated but not currently prioritized:<\/p>\n Mechanical desludging<\/p>\n<\/li>\n Infiltration of the pond overflow for relief<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n Other measures such as the infiltration of the pond overflow or mechanical desludging were examined with regard to their technical feasibility and ecological impact, but are not currently prioritized.<\/span> <\/span><\/p>\n <\/p>\n <\/p>\n![\"Rehabilitation](\"https:\/\/www.iwr-ing.com\/wp-content\/uploads\/\/Gewaesserstabilisierung-Ententeich-Herne-Sued-1024x577.jpg\")
<\/span><\/p>\nBackground: Water balance and challenges of the duck pond<\/h3>\n
Objective: Measures for sustainable watercourse restoration<\/span><\/h3>\n
Procedure: Analysis and evaluation of the current situation<\/h3>\n
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Concept of measures for the restoration of<\/span> the duck pond<\/h3>\n
Level 1 – short-term measures (low expenditure)<\/strong><\/h4>\n
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Stage 2 – additional measures if required<\/strong><\/h4>\n
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