__NOTOC__<small-title />[[Image:Tyrolean_weir_icon.png|right|80px]]
[[Image:Tyrolean weir.JPG|thumb|right|200px|Tyrolean weir|Man checking the grid at a Tyrolean Weir. Tanzania. Photo: D. Bourman, Aqua for All.]]
Dams and water inlet structures in embankments are vulnerable and expensive elements in river-fed water systems. They are easily damaged by floods, underflow, seepage and suffer from build-up of sediment or rubbish in the water. The Tyrolean weir forms a more reliable and cheaper alternative.
===Suitable conditions ===
Tyrolean intakes are used in small permanent rivers and streams where the sediment content and bed load transport are low, or on the crest of a dam spill.
===Resilience to changes in the environment===
====Drought effects on cement====
More information on managing drought: [[Resilient WASH systems in drought-prone areas]].
===Construction, operations and maintenance===
[[Image:Tyro weir.jpg|thumb|right|200px|Tyrolian weirs are meant to intake water from mountain rivers that are very turbulent. Photo: [http://www.iahr.org/membersonly/grazproceedings99/doc/000/000/080.htm Vienna University of Technology]]]
Regular inspection and cleaning of the grit / rack and possibly the gutter and sedimentation tank is required during and after storm periods.
===Costs===
* Material (excluding the pipe and sedimentation tank): US$ 300 - 600.
* Labour (if site is easily accessible): 30 - 50 man days.
===Acknowledgements===
* CARE Nederland, Desk Study: [[Resilient WASH systems in drought-prone areas]]. October 2010.