Re-use of drainage water for agriculture
Fate of agrochemicals and assessment of well clogging during aquifer storage and recovery
E. Kruisdijk (TU Delft - Sanitary Engineering)
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Abstract
Water scarcity is impacting human society and is intensified in the last decades due to an increase in water consumption and climate change. Agricultural irrigation accounts for about 70% of the total freshwater use worldwide. Sufficient freshwater is often available on an annual basis, but seasonal variations result in dry and wet periods. Aquifer Storage and Recovery (ASR) is a promising technology, which enables storing water when abundantly available and re-using this water when needed during droughts. Water is stored in a suitable aquifer through a well and later recovered using the same well or via different wells. In this research, a new application of ASR is assessed, which makes freshwater available for agriculture on a local scale. Fresh water is collected from the tile drainage water system in the soil of agricultural fields. This water is injected and stored into the underlying aquifer, while it would be normally discharged to the surface water system. The stored water can be later abstracted and re-used for crop irrigation...
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