Industrial Wastewater Irrigation Affects Soil Quality in Urban Vegetable Production of Burkina Faso
Juliane Dao1, Kathrin Stenchly1, Armel Nongma Zongo2, Bernd Marschner3, Andreas Buerkert1
1University of Kassel, Organic Plant Production and Agroecosystems Research in the Tropics and Subtropics (OPATS), Germany
Utilisation of industrial wastewater in urban and peri-urban gardens poses risks of contamination of humans, animals, soils and plants. Irrigation with sodic alkaline wastewater is common worldwide and may lower soil productivity especially under semi-arid, hot climatic conditions. Our study reviews literature addressing agricultural use of wastewater with > 100 mg l-1 sodium (Na) under semi-arid climates. Findings were compared to those of a case study from urban gardens in Ouagadougou, Burkina Faso. Our aims were to (i) examine to what extent Na in water can induce soil sodicity; (ii) evaluate the effect of industrial wastewater on top- and subsoil sodification in Ouagadougou, and (iii) compare the results of our case study with those reported in the literature.
Keywords: Industrial wastewater, irrigation, sodic soil, urban agriculture
Contact Address: Juliane Dao, University of Kassel, Organic Plant Production and Agroecosystems Research in the Tropics and Subtropics (OPATS), Steinstrasse 19, 37213 Witzenhausen, Germany, e-mail: daouni-kassel.de