https://www.youtube.com/watch?v=M-BAVYzh1ZY
[Accessed: 14.03.2019]
In this interview with TheWaterChannel Erik Nissen-Peter explains four different water harvesting techniques in a river bed which should be considered before the actual development: hand dug wells, subsurface dams, weirs and sand dams. Erik Nissen-Petersen tells about the advantages of subsurface dams compared to sand dams.