Wednesday, 20 June 2012

Groundwater effects!

Run A7 has given some problems. The accretionary swashes have really build up the beachface, but the combination of a very steep beach and high lagoon level has resulted in the development of groundwater drainage channels around the rig that have sufficient flow power to move sediment.

Thijs kneeling in the drainage channel trying to adjust sensor elevation.

Comparison of beach profile before the experiment and after test A7 - note that the nearshore bar that developed during tests A1-A5 is now completely gone and that the newly-formed berm represents almost 1 m of accretion.

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