IJEP 42(4): 464-469 : Vol. 42 Issue. 4 (April 2022)
1. Hawassa University, Institute of Technology, Department of Water Resources and Irrigation Engineering, Hawassa, Sidama Regional State, Ethiopia
2. Hawassa University, Institute of Technology, Faculty of Biosystem and Water Resources Engineering, Hawassa, Sidama Regional State, Ethiopia
Abstract
This study is based on the quality of wastewater from Hawassa University surroundings, which was assessed to determine its suitability for irrigation purposes. Grab samples of influent and the treated water was taken for assessing quality parameters. The study revealed that the treated water could be used for irrigation purposes with some moderate restrictions. Even though EC and TDS permit to irrigate fruit trees and fodder crops, there is a risk of soil degradation due to the high value of SAR. Results also indicated that carbonate, potassium and phosphate exceeded the specified limits for wastewater reuse in agriculture. Despite increased nutritive elements, continuous use of treated sewage water for irrigation will make the soil acidic. Analysis of soil parameters indicated that there is an increase in nitrogen, phosphate and potassium nutrient levels considerably to benefit crop production but an increase in soil EC is a serious concern.
Keywords
Crop water, Irrigation demand, Pollutants, Sewage water, Water treatment
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