Friday, August 24, 2012

Burried Diffuser by Chahtech

The diffuser for underground irrigation is a new irrigation technique which could be manufactured using several raw materials (plastic, cement, metals, ceramic etc…), but the adequate and cheapest process is plastic injection using specific moulds and plastic injection machines. We design three types of diffusers, each one has a specific use.  

    The buried diffuser can be used in rainfed agriculture, as well as for tree crops and some annual crops to tap roots (maize, sunflower, cucurbits, etc..) .
Besides the use of the buried diffuser for the regular irrigation, it can be used as a solution for the anticipated irrigation and water injection in the deep soil layers “, a technic which is exclusivly setteled down by CHAHTECH SA.
The goal of this new concept is: how to save and conserve the huge of water received during the wet season, for the next dry season. More then that in other regions of the world the challenge is higher: how to save and conserve the huge of water received during the wet or rainy years to be used during the long dry period: which can reach 3 years?

  • The "anticipated irrigation"   
Instead of irrigation during the hot or the dry season, the irrigation using buried diffusers is done during the autumn and winter or during the rainy season. The amount of water of the «anticipated irrigation» should cover the total need of the crop during the hot or dry season (spring and summer). This water amount is stored in the deep soil layers will be used by the deep or sob surface roots systems of the crops.

  • The injection of water in deep soil layers from retention structures (small medium and large hydraulic fesguias, jessours, small lakes, large dams).

This injected water is used for arboriculture some taproots cultures in the summer and drought periods. This allows the exploitation of water resources which are usually lost during rainy years and high rainfall. The amount of the injected water could cover the need of the trees for several years (3years) when the soil below 60cm is thick (1 meter or more). This injected water is conserved in the deep soil layers (60 cm below the soil surface) and used later by the deep root systems of the trees during a long drought period: six months till 3years. During the Drought the trees produce normally using the injected water.Thus 
for one wet year wet and one very wet year and for a hill reservoir, with a drainage basin of ​​700 hectares and a storage capacity of 300,000 cubic meters, these resources that might be injected into the deeper layers of soil rainfed farms are estimated at 1,550,000 meters. This volume injected by diffusers would keep in good water conditions 34 444 adult olive trees for three years. Each tree receives 15 cubic meters per year.

  • The injection of water  in deep soil layers from natural sources
    Particularly during the period from October to May. During this part of the year, spring water, are often little used for irrigation and are lost in the wadis, salty depressions or in the sea. We can estimate the volume of water lost and not recovered, for a source with an average flow of 1 liter / s, during wet and very wet years for 6 months (October to March when there is no use of natural sources water for irrigation, because there is sufficient rainwater seeped into the ground) to 23328m3. This volume lost if it was injected into the soil, may provide for 518 adult olive trees for three successive years of drought.

More information are available on our website