Leaky weirs are ready to be weather tested.

A leaky weir is a type of low barrier constructed across streams or gullies to slow down water flow, allowing it to be absorbed into the surrounding land and recharge groundwater. This practice is particularly beneficial in regions with eroded landscapes, as it helps to rejuvenate soil fertility and biodiversity[2][5][6].

History and Usage
Leaky weirs have been used as part of Natural Sequence Farming (NSF), a method developed in Australia to restore eroded farming landscapes. The approach takes inspiration from the pre-European hydrology of the Australian landscape, which featured wide floodplains and chains of ponds rather than flowing rivers[5]. They are primarily used in Australia, but the concept can be applied globally in similar environments[5][6].

Function and Benefits
Leaky weirs help in reducing erosion, improving water quality, and enhancing agricultural productivity by slowing water flow, allowing sediment deposition, and rehydrating the landscape[2][4][5]. They also create habitats for wildlife and contribute to more resilient ecosystems[4][6].

Materials
Leaky weirs are typically constructed using natural materials such as rocks, logs, soil, and vegetation, which help bind the structure and integrate it into the landscape[4][5].

Pros and Cons
*Pros:*
Reduces soil erosion and improves water quality.
Enhances groundwater recharge and agricultural productivity.
Supports biodiversity and creates wildlife habitats[4][5].

*Cons:*
May require significant planning and permits for construction.
Can be controversial due to differing views on land management practices[5][6].

Future Development
The future of leaky weirs lies in their integration into broader land rehabilitation and regenerative farming practices, potentially expanding their use to combat climate change effects and improve landscape resilience globally[5][6].

Citations:
[1] Weir - Wikipedia https://en.wikipedia.org/wiki/Weir
[2] Creating a leaky weir - YouTube    • Creating a leaky weir  
[3] Resources - Irrigation - Diversion Weirs - ICID https://www.icid.org/res_irri_weirs.html
[4] Leaky weirs and landscape rehydration - YouTube    • Leaky weirs and landscape rehydration  
[5] Leaky weir - Everyday Futures - National Museum of Australia https://everydayfutures.nma.gov.au/pr...
[6] Water Resilience in the Landscape https://smallfarmscapital.org.au/summ...
[7] Leaky Weirs - Natural Sequence Farming Home http://www.naturalsequencefarming.com...
[8] Healing country with leaky weirs - YouTube    • Healing country with leaky weirs