WEBCAST: Monitoring low flows in surface water with flume structures

Dirk van Walt - Van Walt , 19 March, 2020

Presented at NZ Hydrological Society Technical Workshop 17-20 March 2020


Long term monitoring of small bodies of water is becoming increasingly more important and relevant but these small and sometimes very dynamic streams are hard to gauge at the best of times and subject to radical change.  Enter the calibrated flume structure.  A purpose-built channel with a reliable theoretical flow characteristic optimized over a particular range.  These portable structures present a number of advantages for measuring flows from zero to up to 250 L/s but they also come with a new set of challenges.

To clarify appropriate use of flume structures in surface water monitoring and outline challenges and limitations.

Present details based on manufacturers specifications, customer feedback and real-world experience.  Present local case studies

Author bio

Dirk van walt

Ever since he was old enough to sit up Dirk has been obsessed (much to the frustration of his father) with taking things apart and finding out how they work (Vincent’s favourite camera has never quite been the same since). These days are no exception other than that Dirk is able to put them back together in working order again! Dirk’s formal training in wooden boat building and engineering serves him well in his position at Van Walt. When he is not at work you will find him in the garage getting creative with timber or tinkering on his car. Having laid down his chisels and power tools as a form of income Dirk’s new obsession is building the Van Walt name in New Zealand and getting to know your needs.



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