3.4.2 Effluent irrigation

Regional based land evaluation

Agricultural production in the Middle East largely relies on irrigation, but scarce freshwater resources are preferentially allocated to domestic and industrial use. There is an increasing necessity to irrigate with effluents. Depending on site characteristics, land use, irrigation technology and effluent quality, wastewater irrigation may have certain adverse environmental on- and off-site effects. Risks like soil salinization, soil structural deterioration, accumulation and transfer of pollutants have to be controlled in order to prevent the long-term degradation of soil and groundwater resources. With help of Geographical Information Systems and in situ soil surveys and analyses the suitability for irrigation with treated wastewater is classified considering four risks:
1. Transfer of contaminants to crops and groundwater.
2. Soil salinization.
3. Soil structural deterioration and reduced wettability.
4. Boron toxicity and leaching to groundwater.
The results will be made available in form of digital maps and recommendations for land use options.
For more information read Briefing 11 and a Paper

Subproject Coordinator: Bernd Marschner, University of Bochum

Design by noname designs.