| Popis: |
Three irrigation water resources were chosen at Kafr-Saqr district, El-Sharkia Governorate to assess their qualities and their impact on soil properties. The chosen irrigation water were fresh, mixed, and drainage water applied during the two successive seasons of winter-summer of (2013 and 2014). Soil samples were collected from each location at four depths (0-20, 20-40, 40-60 and 60-100 cm). Results showed EC values of mixed and drainage water were above the normal range (which should be < 0.7 dS.m-1)). Also, the mixed and drainage irrigation waters had approximately 3.5 and 5.6 folds the salinity of the fresh water. Mean pH values of the collected irrigation water samples were within the permissible limits (6.5 to 8.4). TDS values of the fresh water were within the normal range (< 450 mg.L-1). Meanwhile, mixed and drainage water were classified as of slightly and moderately salinity hazards. The highest values of turbidity were found in the drainage water, then mixed and fresh water. SAR values of fresh water were < 1.0. The SAR values for mixed and drainage waters ranged from 2.62 to 2.69 and from 3.68 to 3.76, respectively. BOD and COD values violated the standard limits of law 48/1982 (10 mg.L-1 for drainage water and 6 mg.L-1 for fresh water) except for the BOD values of fresh water. The increase in pH values for the soil irrigated with the mixed and drainage. The continuous irrigation of soil by wastewater resulted in continuous increase in EC values. As well as, increase the amount of total soluble salts in all layers. The application of the different irrigation waters led to increase in soluble ion. |
