Secondary Drainage System for Localized Flooding Control
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Solution Overview
Problem
Localized flooding of land or property remains for an extended period after a localized severe rain storm or river flooding has receded, causing difficulties in daily life and potential environmental issues from improper groundwater management.
Innovation Solution
A secondary drainage system comprising a rainwater storage tank with inflow switching valves, a water guiding means to collect water from locally remaining flooded zones, and a drainage means to efficiently drain the stored water, allowing for early resolution of localized flooding without environmental harm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rainwater control reservoirs and underground rivers are used for flood control, then widespread flooding is controlled, but localized flooding remains for several days to weeks
Solution Approach 1:
The system divides floodwater management into two segments: primary drainage during active flooding using control reservoirs and underground rivers, and secondary drainage for residual localized flooding using the water storage tank. This segmentation allows each system to address specific stages of flooding, reducing overall drainage time.
Solution Approach 2:
The water storage tank is pre-positioned and pre-configured with drainage facilities before flooding occurs. When flooding recedes and localized water remains, the tank can immediately begin secondary drainage operations without requiring additional setup time, thus reducing the duration of localized flooding.
2Productivity
If rainwater is stored in rainwater storage tanks during larger rainfall, then rainwater drainage control is achieved, but the system complexity increases
Solution Approach 1:
The water storage tank serves multiple functions: it stores rainwater during heavy rainfall, stores residual floodwater after river flooding recedes, and provides secondary drainage to eliminate localized flooding. This multi-functionality consolidates what would otherwise require separate systems into a single versatile structure, reducing overall system complexity.
Solution Approach 2:
The system merges the rainwater storage function with the floodwater secondary drainage function into a single water storage tank facility. By combining these functions, the system avoids the complexity of maintaining separate storage and drainage infrastructure, while achieving both rainwater control and localized flood elimination.
3Loss of time
If drainage facilities are installed to eliminate localized flooding, then flooding duration is reduced, but construction cost increases
Solution Approach 1:
The water storage tank is designed to serve dual purposes: rainwater storage during heavy rainfall and secondary drainage for localized flooding. This multi-functionality means the same infrastructure addresses multiple problems, reducing the need for additional dedicated drainage facilities and thereby lowering construction costs while still achieving rapid elimination of localized flooding.
4Loss of time
If water is continuously drained from flooded areas, then flooding is eliminated quickly, but environmental harm occurs from improper groundwater management
Solution Approach 1:
The water storage tank acts as an intermediary between the flooded area and the groundwater system. Instead of directly draining floodwater into the ground (which causes environmental harm), the tank temporarily stores the water and provides controlled secondary drainage, mediating the water flow to prevent harmful effects on groundwater while still eliminating flooding.
Solution Approach 2:
The system performs preliminary storage of floodwater in the tank before final drainage to groundwater. This preliminary action allows for controlled management of water flow, preventing improper groundwater management and environmental harm while still achieving quick flood elimination through the structured two-stage drainage process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The secondary drainage method effectively eliminates localized flooding by guiding and draining water from remaining flooded areas, reducing the burden on local residents and avoiding environmental problems associated with improper groundwater management.
Implementation Method 1
a water storage tank with a bottom surface lower than a bottom surface of the flood control reservoir, wherein the underground water storage tank has a water supply port provided at the bottom of the flood control reservoir to receive water collected in the flood control reservoir
Data Source
AI summary
The present application provides a secondary drainage method for use at the time of flooding. A rainwater storage tank is provided, drainage pipes are installed between positions in which flooding of land or of property occurs and the rainwater storage tank, and inflow switching valves are installed in portions where water flows in from the drainage pipes to the rainwater storage tank. As a general rule, the flow of water into the rainwater storage tank is prevented by switching the inflow switching valves during the initial stages of a localized severe rain storm or of river flooding. After the wide-area flooding of land has receded, the inflow switching valves are opened, guiding the water in the locally remaining zones of flooded land or of flooded property into the rainwater storage tank, and allowing the localized flooding of land or of property to be eliminated at an early stage.