Studies and researches have been conducted all over the world in order to assess the impact of using treated wastewater for supplementary irrigation for rainfed agriculture.
This thesis aims to assess the impacts of using treated wastewater on rainfed agriculture.
Jenin has been chosen as the study site, since it is one of largest agricultural area in West Bank. Contributes with about 16.2% of the agricultural production in the Palestinian market.
An analysis was done to estimate the quantity and the quality of treated wastewater and its effect on rainfed agricultural areas, and production.
The quantities of treated wastewater were estimated for years 2015, 2020, and 2025. During these years, the quantity of wastewater will increase in Jenin governorate due to population growth rate of 2.3%.
The current amount of treated wastewater in Jenin and Anza wastewater treatment plants is 1,309,744 m3/y and it can irrigate (2911 Dunum/y). In 2020, the quantity will be 2,714,768 m3/y which can irrigate an average of (6,033 Dunum/y). In 2025, the quantity of treated wastewater will be 3,302,819 m3/y and it can irrigate an average of 7,340 Dunum/y.
The crops chosen for this research are in accordance with the guidelines of Palestine, FAO, and WHO, for reuse of treated wastewater.
The quality of treated wastewater that exits in the Jenin wastewater treatment plant is not in conformity with FAO and Palestinian guidelines. Accordingly, in order to use it, the wastewater needs tertiary treatment using chlorine or UV radiations, but the treated wastewater from Anza wastewater treatment plant can be used without extra treatment
because they use chlorine for disinfection and it is used for irrigating olive trees in Anza town.
The quantity of treated wastewater increases by a factor of 1.6 and so the areas to be irrigated with water will also increase. The treated wastewater in Anza goes to a reservoir which has a capacity of 500 m3 and the capacity of the reservoir is 3,000 m3 in Jenin.
Reclaimed wastewater can play a significant role in mitigating the prevailing water shortage in Palestine, and specifically for supplementary irrigation of rainfed crops to fill in the gap between crop water requirement and rainfall precipitation.