Two-thirds of the Iranian territory amounting to around 1,046,466 km 2 is characterized by (semi-)arid climates. Additionally, a vast area between 15 to 35 million ha is salt land while thousands of salt land is also added annually. This situation warrants a deeper understanding of water and salt soil as well as optimum methods of their exploitation. A solution to the water shortage during droughts is desalination. A most appropriate method to increase irrigation efficiency and to combat water crisis is the use of pressurized irrigation systems. Trickle irrigation has great differences with other irrigation systems in that it only spreads water over a small area around the plant. The most formidable problem in trickle irrigation systems is the clogging of emitters. The major cause of this is the presence of mineral and organic salts in water. The best to combat emitter clogging is the installation of filters at the water inlet so that such materials are prevented from entering the irrigation system. Obviously, cleaning the emitter or replacing them is associated with great costs and labor. The application of nanotechnology in the trickle irrigation systems may be considered to reduce the problem. The advantages include faster and less expensive cleaning compared to current practices. These primarily stem from their better reactions, specific area, better transfer, subsurface transfer, and nanomaterials complexing properties. In order to reduce the EC of the irrigation water, the rice husk and almond shells ashes were used in the present study, of two different mili- and nano- particle sizes with 10% and 20% particle volume percents in a sand filter used in the trickle irrigation system. Two inlet discharge rates into the sand medium of 3 m 3 /hr and 6.1 m 3 .hr were assumed for the purposes of this study. The results revealed that using rice husk nanoparticles (with a volume percent of 20% and an inlet discharge rate of 6.1 m 3 /hr ) reduced the average EC by 94.42%. Almond shell ash compared to rice husk ash led to changes in water acidity, which is due to the higher temperature caused by the almond shell ash than that by rice husk ash. The nanoparticles also showed a better performance in reducing cations and anions when compared to miliparticles. The 10% volume percent of absorbers in the porous medium showed a better trend in EC reduction than 20% volume percent in the filter. EC reduction rate was higher during the first 20 minutes of the experiment, which reached a steady state equilibrium after 40 minutes. The EC reduction rate in the water passing through the filter containing almond shells ash and at a rate of 6.1 m 3 /hr was better while rice husk ash required more turbulence for EC reduction. The results also showed that EC variations reduced by 81.5% and 92.5%, respectively, with rice husk and almond shell ashes.