Drogue-based measurements of estuarine suspended sediment characteristics: a new approach

C Schacht, C Lemckert

Research output: Contribution to journalSpecial issue

Abstract

In situ measurements of estuarine parameters are usually made at fixed sites, strategically chosen to best represent the system. However, this method does not accurately evaluate phenomena occurring between these stationary points (such as the flocculation and deflocculation of suspended sediments). To alleviate this problem, a new drogue was developed so that a specified parcel of estuarine surface water could be followed and its properties monitored over time. The drogue was equipped with a Global Positioning system (GPS) for monitoring the drogues position, an ASM-IV sediment staff for measuring optical back scatterance levels every 1 cm at 6 second intervals, within the top 2 m of the water column, and a Greenspan CTD sensor for monitoring temperature and conductivity of the water parcel at 20cm depth. Data collected from a trial experiment showed that while the device was beneficial for studying estuarine sediment dynamics, the horizontal scale of estuaries (-100 m) poses limitations on the drogue's use
Original languageEnglish
Pages (from-to)124-129
Number of pages6
JournalJournal of Coastal Research
Issue number41
Publication statusPublished - Jan 2004
Externally publishedYes

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