***Bathymetric Survey of the Intertidal Area, Chateau Margot Coastline, Guyana, Dec 2019 - Jan2020***
With the inclusion of historical bed levels included within the PhD research and the publications.

Folders
1. Field_2020_data

Summary, 2020;  File Format: .xyz
- Coverage includes within the mangroves and on the mudflat. Within the mangroves, a combination of traditional surveying 
  techniques were used with the automatic level and theodolite. Within the mangroves, limited satellite coverage prevented the 
  use of the DGPS. A permanent bench mark (PBM) was established at the base of the earthen embankment. This PBM was then used to 
  establish the eleven transects along the field area (1000 m x 3500 m). 

- Along the mudflat, the depths were attained using an echo sounder.  boat itself. These measurements were taken over four days to
  complete ten (10) transects. Due to the shallow water depths expected between 1- 5 m, the single beam echo sounder gives quite 
  accurate results and offers significant cost saving over the multi-beam versions.

- Surveyed depths were relative to Guyana Datum (GD) but these were converted relative to mean sea level (MSL).
  GD is 13.76 m below Chart Datum (CD), Ref: Guyana Tide Tables, 2004. MSL is 1.8 m above CD and 15.56 m above GD in Georgetown.

2. GEBCO_data

Summary Historic Bed Levels;  File Format: .xyz

2004
- In November/December 2003 lines were surveyed with a spacing of 2 km (in offshore blocks). In May/June 2004 the intermediate lines
  were surveyed. The measured depths were corrected using measured water levels at Georgetown.

The General Bathymetric Chart of the Oceans (GEBCO) Gridded Bathymetric Datasets, 2004, 2008,2019

- The bed level measurements were supplemented by the global bathymetric charts. A timeline was then developed which spanned
  the mudbank cycle along the Guyana coastline, approximately 20- 30 years.