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→Construction, operations and maintenance
Plus d'information sur le gestion de la sécheresse : [[Resilient WASH systems in drought-prone areas|systèmes de résistance WASH dans des régions sujettes à la sécheresse]].
===Construction, operations and maintenancefonctionnement et entretien===[[Image:Tyro weir.jpg|thumb|right|200px|Tyrolian weirs are meant to intake water from mountain rivers that are very turbulent. Photo: [http://www.tuwien.ac.at/en/tuwien_home/ Vienna University of Technology]]]A Tyrolean weir can either Un déversoir tyrolien peut soit consist of parallel rods or a perforated plate, installed in the flow direction over the width of the stream with a 15-30 degree downward slope. Large stones, branches and large leaves cannot pass between the rods, and are prevented from entering the gutter. Because the rods / plate slopes downward, the material in the stream is pushed downstream, until it drops over the end of the weir.
The threshold can be a concrete elevation above the rocky bed of a mountain stream, or a vertical low weir structure, anchored in the embankment. The capacity of the inlet pipe / drain (diameter and gradient) should be 30% more than the design flow and have an uniform gradient to prevent accumulation of sand. The sedimentation tank can accumulate 1.5-2 m<sup>3</sup> of deposits and allows water to filter for 10 to 30 minutes at very low speed. It is cleaned by washing it out.