Spiral Lock Chamber for Fish Migration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fish ladders and lifts require significant space and resources, are costly, and often disrupt the natural migration of fish, especially when overcoming large height differences, which can lead to habitat fragmentation and decline in fish populations.
Innovation Solution
A three-dimensional spiral lock chamber system that connects downstream and upstream water, allowing fish to ascend or descend with a moderate incline, requiring minimal space and construction, with a design that includes multiple fluidically separate lock chambers and adjustable sluice doors to facilitate continuous fish passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional fish ladders or lifts are used to overcome large height differences, then fish migration capability is improved, but the space required and construction cost increase significantly
Solution Approach 1:
The patent applies a three-dimensional spiral configuration to the lock chamber, transforming the traditional linear or stepped structure into a helical form that utilizes vertical and radial dimensions simultaneously. This spiral geometry allows the lock chamber to overcome large height differences while occupying minimal horizontal space, directly resolving the contradiction between migration capability and space requirement
Solution Approach 2:
The lock chamber is designed as a compact, self-contained spiral structure that nests within a small footprint. The helical path allows the chamber to contain a long migration path within a condensed spatial envelope, enabling fish to traverse significant vertical distances without requiring proportionally large horizontal areas
2Area of stationary object
If fish lifts are used to transport fish vertically, then the space requirement is reduced, but the natural migration direction of fish is disrupted and technical complexity increases
Solution Approach 1:
The lock chamber employs a spiral curved path instead of vertical lifting, allowing fish to swim along a gentle inclined helix that mimics natural stream flows. This curved geometry maintains continuous water flow and natural migration direction while achieving vertical displacement, avoiding the disruption caused by discrete lift mechanisms
Solution Approach 2:
The system uses controlled water flow through the spiral lock chamber to create a self-propelling current that guides fish naturally along the migration path. The hydraulic design ensures continuous flow that maintains fish motivation and direction without requiring mechanical lifting or artificial containment, preserving natural migration behavior
3Adaptability or versatility
If traditional fish ladders are constructed to accommodate large height differences, then fish passage capability is improved, but the construction effort and material resources increase
Solution Approach 1:
By transitioning from a linear vertical structure to a three-dimensional spiral configuration, the patent achieves large height differences within a compact form factor. This dimensional transformation reduces the total length of construction elements needed while maintaining the functional capability to overcome significant elevation changes
Solution Approach 2:
The spiral lock chamber design serves multiple functions simultaneously: it provides the migration path, contains the water flow system, defines the structural boundaries, and creates the necessary elevation change. This multi-functionality consolidates what would traditionally require separate components into a single integrated structure, reducing overall construction effort
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 system enables efficient and continuous fish migration over large height differences with minimal space and resource requirements, maintaining natural migration patterns and reducing habitat fragmentation, while being adaptable to various fish species and environmental conditions.
Implementation Method 1
a lock chamber (4, 104, 204), which extends in the form of a three-dimensional spiral (10) between the underwater (UW) and the headwater (OW) and fluidly connects them to one another
Data Source
Figure 1
Figure 2
AI summary
A device (2) for fish ascent and/or descent to overcome a height difference between a lower water level (LW) and an upper water level (WL), wherein the device (2) has a lock chamber (4, 104, 204) which extends between the lower water level (LW) and the upper water level (WL) and connects them fluidically, and which can be closed off from the lower water level (LW) with a lower lock door (6, 106, 206) and from the upper water level (WL) with an upper lock door (8, 108, 208), is designed and further developed with regard to a space-saving, cost-effective, technically simple, versatile and adaptable device (2) such that the lock chamber (4, 104, 204) extends in the form of a three-dimensional spiral (10) between the lower water level (LW) and the upper water level (WL).