All our fresh water contains salts, even in your bottle of drinking water. Thus irrigation (except rainfed) builds up salt-levels in the soil. Like in your own body you have to leach out the salts from the soil to keep the soil salinity under control.
In around 20% of the irrigated areas in the World the natural drainage is not sufficient to control the soil salinity levels and artificial drainage, either by open or pipe (tile) drains is needed. Salinity build-up is a slow process and consequently “Irrigation is the need for today, salinization is a problem of tomorrow” is a voice that echoes across farmers, engineers and government departments alike. What further complicated the problems is that drainage is a jointed activity in which farmers have to work together.
Dr. Henk Ritzema is an Assistant Professor at Wageningen University, The Netherlands, where he is with the Water Resources Management Group. He will discuss the role of drainage to reduce problems associated with waterlogging and salinity in irrigated agriculture. He will discuss examples and solutions from around the world and the challenges that we face to reverse the negative trend in salt build-up and waterlogging.
Click here for more information on the topic, on Dr. Ritzema, how to attend the webinar, and local timings (it is free and open to all).
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Find out more by watching the recording of our last webinar on ‘Salinization, Water Scarcity and Future Agriculture’, carried out by Dr.Shoaib Ismail and visit www.TheWaterChannel.tv/SaltyWorld