En poursuivant votre navigation sur ce site, vous acceptez l'utilisation de ces cookies. Surface irrigation stands for a large group of irrigation methods in which water is distributed by gravity over the surface of the field (note: surface irrigation does not include spate irrigation). Forme et relations de l'intestin grêle: Le duodénum est caractérisé par ses relations avec l'estomac. irrigation (n.f.) ○   Boggle. It is by far the most common form of irrigation throughout the world and has been practiced in many areas virtually unchanged for thousands of years. The advance phase refers to that length of time as water is applied to the top end of the field and flows or advances over the field length. Furrow irrigation is particularly suited to broad-acre row crops such as cotton, maize and sugar cane. This can be achieved through increasing flow rates or through the practice of surge irrigation. Get instant definitions for any word that hits you anywhere on the web! Vous n’aurez pas besoin de faire des tranchées et d’attaquer votre jardin pour mettre un tel système en place. définition - irrigation signaler un problème. shən] (agriculture) A method of providing water to plants by raising the water table to the root zone of the crop or by carrying moisture to the root zone by perforated underground pipe. DESIGN PARAMETERS FOR THE INFIELD WORKS 25 3.1. . It is also practiced in various horticultural industries such as citrus, stone-fruit and tomatoes. ○   Lettris STANDS4 LLC, 2020. 2. La plupart des définitions du français sont proposées par SenseGates et comportent un approfondissement avec Littré et plusieurs auteurs techniques spécialisés. Jouer, Dictionnaire de la langue françaisePrincipales Références. Surface irrigation comes in three major types; level basin, furrow and border strip. In Surface Irrigation, water is applied and distributed over the soil surface by the help of gravity. This Fact Sheet provides general information on key aspects of this historic technology that is still in use in many parts of the world. We're doing our best to make sure our content is useful, accurate and safe.If by any chance you spot an inappropriate image within your search results please use this form to let us know, and we'll take care of it shortly. Irrigation Definition. 3.1 million km2 of land available for irrigation purposes, while only approx. Surface irrigation is the application of water by gravity flow to the surface of the field. The reduction in infiltration is a result of surface consolidation, filling of cracks and micro pores and the disintegration of soil particles during rapid wetting and consequent surface sealing during each drying phase[2]. The water is applied rapidly to the entire basin and is allowed to infiltrate. Images & Illustrations of surface irrigation. Type of crop 24 2.5.3. Apprendre la définition de 'irrigation de surface'. LA fenêtre fournit des explications et des traductions contextuelles, c'est-à-dire sans obliger votre visiteur à quitter votre page web ! Irrigation qui projette l’eau en l’air pour tomber à la surface du sol sous forme de fines gouttelettes). Either the entire field is flooded (basin irrigation) or the water is fed into small channels (furrows) or strips of land (borders). Surface Irrigation is a kind of irrigation where gravity works its best. In reality, some … Surface Irrigation is an … Lavage d'une région du corps avec de l'eau ou des liquides médicinaux à des fins thérapeutiques. The spacing between adjacent furrows is governed by the crop species, common spacings typically range from 0.75 to 2 metres. It significantly increases public health risk particularly if there is concern about reliability of the treatment and/or disinfection system. The depletion phase is that short period of time after cut-off when the length of the field is still submerged. Copyright © 2000-2016 sensagent : Encyclopédie en ligne, Thesaurus, dictionnaire de définitions et plus. Surface irrigation (Figure 12.1) of secondary treated and disinfected effluent is permitted in NSW. Définition et déroulé du surfaçage radiculaire ou curetage Le surfaçage radiculaire fermé . Drainage of flooded banks or drainage of extremely wet soil during the rainy saison may be done by ditches. Surface irrigation is defined as the group of application techniques where water is applied and distributed over the soil surface by gravity.  | Informations Vérifiez la prononciation, les synonymes et la grammaire. Il est aussi possible de jouer avec la grille de 25 cases. Required depth of irrigation application 24 2.5.4. Une fenêtre (pop-into) d'information (contenu principal de Sensagent) est invoquée un double-clic sur n'importe quel mot de votre page web. (physiologie) arrivée du sang à un organe, un tissu. Also known as subirrigation. Each method includes several variations, only the more common of which are considered here. In reality, some of the irrigation practices grouped under this name involve a significant degree of management (for example surge irrigation). Thanks for your vote! Although surface irrigation, Surface irrigation Uncontrolled flooding, Border strip,Check,Basin,Furrow method. Nous contacter Land grading is not necessary for other methods. However, surface irrigation has limitations because it increases the chance of human contact with the effluent. An example is blueberries. Increasing the advance rate not only improves the uniformity but also reduces the total volume of water required to complete the irrigation. Basins may be linked sequentially so that drainage from one basin is diverted into the next once the desired soil water deficit is satisfied. The speed of water movement is determined by many factors such as slope, surface roughness and furrow shape but most importantly by the inflow rate and soil infiltration rate. Surface irrigation is the introduction and distribution of water in a field by the gravity flow of water over the soil surface. The recession phase describes the time period while the water front is retreating towards the downstream end of the field. As the inflow ceases the water will continue to runoff and infiltrate until the entire field is drained. You can also control how much water you add at a time and only give specific amounts of water to certain crops in your garden at a time. Web. Surface irrigation is where water is applied and distributed over the soil surface by gravity. Irrigation (n.) 1. By using our services, you agree to our use of cookies. Les jeux de lettres anagramme, mot-croisé, joker, Lettris et Boggle sont proposés par Memodata. Furrows may range anywhere from less than 100 m to 2000 m long depending on the soil type, location and crop type. means irrigation by gravity, furrow, or flood utilizing water from a ditch, canal, pipe, or other conveyance directly to the surface of the ground, which is distributed across the field through a channel, furrow, or border by the force of gravity. (FAO, 2008). While there are different methods of irrigating that fall under the general definition of surface irrigation, all approaches will make use of a few common principles and strategies. Surface water: Surface water is provided by flowing water of river of from still waters of tanks, ponds, lakes pools or artificial reservoirs such as dams, barrages and diversionary bunds with different storage capacity. Cookies help us deliver our services. Indexer des images et définir des méta-données. The crop yield from irrigation is expressed as quintal/ha or tonnes/ha. Methods of irrigation surface irrigation. Surface irrigation is normally used only where the land has been graded so that uniform slopes exist.  | Privacy policy The effectiveness of surge irrigation is soil type dependent, for example many clay soils experience a rapid sealing behaviour under continuous flow therefore surge offers little benefit[1]. Surface irrigation is often referred to as flood irrigation, implying that the water distribution is uncontrolled and therefore, inherently inefficient. Définitions de irrigation. The water can take a considerable period of time to reach the other end, meaning water has been infiltrating for a longer period of time at the top end of the field. One common use of this technique includes the irrigation of pasture for dairy production. Flow or advance over the soil type, location and crop type arrosoir, seau, etc. methods surface. System of the surface methods, surface irrigation is often referred to flood! 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