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Down the lightly sloping trail leading to the cultivated area of the Oasis, water flows thanks to gravity, within wide galleries which can extend for tens of kilometres. Useful to the maintenance of the whole system, shafts are dug out deep in the ground at regular intervals. Even after decades, however, dwellers come to observe the arrival of sudden flash floods which can abruptly fill riverbeds, and even cause full-scale flood with catastrophic consequences.ĭrainage galleries, which still partially provide water supply to Oases, are traditional water catchment systems: large underground tunnels equipped with ventilation shafts. This is the hidden water heritage harnessed – with drainage galleries and shafts – by other Oases located all along the wadi. Thanks to subsoil water flows which are the remains of rainfalls on very distant mountains, surface groundwater is thus regenerated. However, water slowly keeps flowing in the surrounding alluvial undergrounds and under their beds. In most cases, wadis (drained millennia ago) are dry most of the year. Therefore, on those ancient shores, we find Oases able to harness such water resources through dykes, water diverters, sluices and dams. In some wadis, rainfall water from mountain ranges, still flows above ground although in small quantities. Indeed, still today, we can identify the course of prehistoric rivers, called Wadi, the ancient hydrographic network, carved into sandstone or limestone rocks, forming deep canyons. Sahara and Arabian deserts were once fertile and water-rich lands. This is the so-called condensation process. Upon touching the ground, by now very cold, the water vapour in the air is condensed and turns into small droplets, which lay on the ground’s surface. At night time, two factors, dry air and the lack of vegetation, determine high thermal variations with a sudden drop in temperatures. Water vapour is also present, although in limited quantities, in the desert’s hot air. Rainfalls thus feed, although discontinuously, desert groundwater and regenerate them gradually through a process which can last hundreds of years. This is how water tables are formed as well as microflows that migrate for thousands of kilometres and slowly seep into the Erg’s great sandy masses or run underground – following the courses of ancient river valleys and of extensive alluvial surfaces – until they reach the basins of the great depressions, the Sebkha: the terminal of the hydrographic network, dating from Prehistory, which lost its sea outlet.

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When free water is not harnessed upstream through dykes and cisterns – such as the Resaf in Yemen – or when flash floods don’t convey it into the beds of prehistoric rivers, rainfall permeates through the open fractures of mountain massifs and it is lodged in the porosity of permeable rocks on the highlands. However, the water flow of sporadic rainfalls on the Saharan and Arabian altitudes is stored underground, in different ways and places. Contact us today to learn more about our available mulches and place an order for mulch delivery in Melbourne.There is hardly any rainfall in desert environments. Black Mulch – A long lasting and all-purpose mulch that contrasts well with paving areas, but can leave stains on concreteĬontact Us Today Fultons is the number one choice for garden mulch supplies and garden mulch bulk bags, including pine barks, tan barks, red mulch and wood chips for landscaping.Mulch Master – An organic mulch made from recycled plant based materials such as branches and pallets.Pine Barks – We stock pine barks of multiple sizes depending on your requirements, from fine pine barks for smaller plants through to larger sized pine barks that last longer.Red Mulch – Similar to terracotta chips, but offering a more brightly coloured mulch that also holds its colour for a long time.Softfall Play Mulch – A light coloured mulch suitable for both residential and commercial playgrounds and gardens.

Terracotta Chips – Medium sized and light red coloured mulch, known for holding its bright colour for a long time.Tree Clippings – A budget option consisting of chipped branches and leaves varying in colour and texture.Our mulch suppliers in Melbourne have no shortage of options for you to choose from, including:

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Offering mulch delivery in Melbourne as well as the ability to buy mulch in bulk, our professional garden mulch suppliers can meet your needs and exceed your expectations.

Whether you’re looking for budget options like general tree clippings or more premium options like pine barks, we have you covered. At Fultons, we’re proud to stock a range of quality garden mulch supplies for clients throughout Melbourne.