Changes

Water Portal / Rainwater Harvesting / Groundwater recharge / Gabions

No change in size, 03:04, 28 May 2013

no edit summary

[[Image:gabions icon.png|right]]

[[Image:gabionStructure.jpg|thumb|right|~~300px~~200px|Gabion structure in a stream bed. Photo: SAI.]]

__NOTOC__

A gabion is semi permeable barrier, made of boulders in a mesh of steel wires and anchored to the stream bank, to slow but not stop, the flow of storm water in a small watercourse so to favour water infiltration to groundwater and help prevent soil erosion.

==Construction, operations and maintenance==

[[Image:gabionwirerock.jpg|thumb|right|~~300px~~200px|Gabions are essentially wire mesh enclosures filled with rocks. Photo: [http://www.ehow.com/how_7832350_make-gabions.html Daniel Thomas, eHow Contributor.]]][[Image:gabionConstruction.jpg|thumb|right|~~300px~~200px|A close-up view of the process of gabion basket construction. Photo: [http://sgp.undp.org/web/images/5052/a_close_up_view_of_the_process_of_gabion_basket_construction.html sgp.undp.org.]]][[Image:gabionwall.jpg|thumb|right|~~300px~~200px|Building a gabion wall on a large river. Photo: [http://www.johanradyntransport.co.za/products.html Johan Radyn Transport.]]]

A gabion structure can be built without any mechanical equipment and works can start immediately because the initial stages of excavation and laying of foundations are minimal and can be carried out by hand. Likewise, for underwater structures, the first layer of gabions can be laid in water or in mud without the need for draining the site. Upon completion, a gabion structure will take its full load immediately without the waiting periods - of up to one month - normally associated with concrete structures. Furthermore, it is relatively easy to obtain good construction quality because of the simplicity of the two construction materials, i.e. the gabion baskets and the stones or rock fragments.

Winona

Akvopedia-spade, akvouser, bureaucrat, emailconfirmed, staff, susana-working-group-1, susana-working-group-10, susana-working-group-11, susana-working-group-12, susana-working-group-2, susana-working-group-3, susana-working-group-4, susana-working-group-5, susana-working-group-6, susana-working-group-7, susana-working-group-8, susana-working-group-9, susana-working-group-susana-member, administrator, widget editor

30,949

edits