Online training: Groundwater Tube recharge (Oct 2016) by Rik Haanen | Oct 26, 2016 | Highlights <iframe width="854" height="480" src="https://www.youtube.com/embed/mv3d8yJqbp8?list=PLFDNmeXgQiBhzNM4mGl51Y30b8346wTDq" frameborder="0" gesture="media" allowfullscreen></iframe>