Because a variety of water conditions were used to obtain data for the study, it was possible to obtain a wide range of results.
The study was an oceanographic survey, which was conducted during the spring and neap phase of the tidal cycle at the Dart and Tamar estuaries. This offered a thorough observation of water column through a period of low water and high water. The table below shows the details of the project:
River Tamar is found in southwestern England, and forms the border between Devon (to the east) and Plymouth city (to the west). Before entering Plymouth Sound, River Tamar at its mouth, flows into the Hamoaze where it joins with River Lynher.
The source of River Tamar is less than four miles (6 km) from the north Cornish coast, and it drains southward. Having a tidal length of thirty-two kilometres from its seaward end, the Tamar estuary is a partially mixed, mesotidal estuary. For about fifty miles, the River Tamar flows south to the English Channel, coursing its way through steep wooded country in its middle reaches.
This location was used to collect data profiles during spring tides on December 07, 2005, between the time range of 09:40am to 16:00pm, and during neap tides on December 11, 2005 between the time ranges of 08:00am to 14:10pm.