A bioretention pond device for flood control in aquatic ecological rivers

CN224450449UActive Publication Date: 2026-07-03SHAANXI WATER CONSERVANCY & ELECTRIC POWER SURVEY & DESIGN INSTITUTE (GROUP) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHAANXI WATER CONSERVANCY & ELECTRIC POWER SURVEY & DESIGN INSTITUTE (GROUP) CO LTD
Filing Date
2026-02-05
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

During short-term heavy rainfall, the surface runoff in existing bioretention ponds surges, leading to sewage accumulation and saturation failure of the filter layer, thus affecting flood control and purification effects.

Method used

A bioretention tank incorporating an overflow prevention structure and a modular filtration structure was designed. Through the combination of active overflow and multiple filtration layers, emergency filtration and step-by-step purification are achieved, ensuring that sewage can still be effectively treated under extreme rainfall conditions.

Benefits of technology

It significantly improves the flood control reliability and water purification capacity of the device under extreme hydrological conditions, ensures that sewage is not directly discharged, and improves the maintainability and long-term operational reliability of the system.

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Abstract

This utility model relates to the field of bioretention pond technology and discloses a bioretention pond device for flood control in aquatic ecological rivers. It includes a retention pond with a drain pipe connected to its lower end. The retention pond has a connecting block inside, dividing it into a shallow water layer and a water-containing cavity. The upper end of the connecting block has multiple mounting slots and holes, with one end of each slot and hole extending into the water-containing cavity. Each mounting slot has a filter structure installed inside, and each mounting hole has an overflow prevention structure installed inside. This utility model, through the active overflow of the overflow prevention structure, effectively avoids excessive accumulation of sewage in the shallow water layer and prolonged soaking of plant roots in the saturated layer. It ensures that even under critical overload conditions, the overflow water undergoes substantial filtration rather than direct discharge, thus significantly improving the overall flood control reliability and water quality buffering capacity of the device under extreme hydrological conditions.
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