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Jordan University of Science and Technology (JUST) 2006

Selected Soil and Plant Properties at Different Sites as Affected by Irrigation Water from Zarqa River

Ali Hasan Ahmed Abu Hammour

Titre : Selected Soil and Plant Properties at Different Sites as Affected by Irrigation Water from Zarqa River

Auteur : Ali Hasan Ahmed Abu Hammour

Université de soutenance : Jordan University of Science and Technology (JUST)

Grade : Master of Science (MS) 2006

Résumé
With the increasing scarcity of freshwater resources in Jordan, the reuse of treated wastewater in agriculture could be a promising solution. The objectives of this study are to evaluate irrigation wastewater quality with distance intervals starting from the source in Kherbit Es-Samrah (KS) treatment plant along Wadi Dhulil (WD) and Zarqa River (ZR), and to study its impact on some soil physical and chemical properties. Impact on some properties of crops grown in the tested sites was conducted as a supplementary work. Soil and water, samples were collected from three locations at 0, 15, 30 km distance intervals along the river. Additional site about 5 km east of (KS) irrigated with fresh water was sampled as control. Soil samples at each location were taken from three sites at three depth intervals (0-20), (20-40), (40-60). Results showed that application of wastewater as irrigation water increased bulk density, pH, and ECe. The impact of wastewater application on hydraulic conductivity and infiltration rate was noticed in fine textured soils only.. Levels of Ca, Mg, Na, and ECe of the control were higher than those of the treated locations. Organic matter and nitrogen found to be higher in the treated locations. Both OM and N decreased significantly with distance and depth. Cd and Pb concentrations in soils at all locations were below the acceptable range. Cd and Pb accumulation was higher in the remote sites indicating a contamination after (KS). Ecw, pH, TDS, SAR, Ca, Mg, Na, Cl, and SO4 concentrations in irrigation wastewater increased with distance.

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Page publiée le 12 novembre 2016, mise à jour le 22 mars 2019