Aqua Monitor Surface Land Gain (1985-2016)

The Deltares Aqua Monitor is an open tool that detects land and water conversions globally, during the last 30 years at 30m resolution. Results of the Aqua Monitor only show compound impacts of natural and human change or variability but does not look into water and sediment budgets which would be required to determine the causes of these changes. Static maps have been exported from the tool which displays accumulative land and water changes between 1985-2016. For further detail on the methodology see Nature Climate Change paper:

Data Resources (3)

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Additional Info

Field Value
Dataset topic category
  • Land
  • Water resources
  • English
Use limitations There are no access use and constraints to the data it is open and the code is freely available from this repository: All attributions however to the research paper and Aqua Monitor should site the original authors.
Dataset reference date September 1, 2016
Temporal extent's start date September 24, 2016
Temporal extent's end date September 24, 2016
  • Cambodia
  • China
  • Lao People's Democratic Republic
  • Myanmar
  • Thailand
  • Viet Nam
West bounding coordinates 92.17253804236762
East bounding coordinates 109.46331063110017
South bounding coordinates 5.608182318758175
North bounding coordinates 28.550256359886635
Spatial Reference System WGS 84 (EPSG:4326) (CRS:84)
Positional Accuracy The Aqua Monitor uses Landsat images at 30 m resolution to establishes water-land and land-water occurrence on-the-fly by estimating the MNDWI spectral index values and performing trend analysis for these MNDWI values over both user-selected periods. The exported assess provided are at a 300 m resolution. Accuracy is dependent on available images.
Logical Consistency There are no known issues with logical consistency.
Completeness Preliminary analysis using the Aqua Monitor yields only static accumulated changes over the select periods and does not represent standing water. Calculations are only collected during years where images are available.
Process Step The Aqua Monitor was used to extract 300m assets from Google Earth Engine, clipped to the Greater Mekong Region and area calculations made. The source code is available at: Further details of the development of the tool can be found in the Aqua Monitor Supplementary Information document.
Lineage Donchyts, Gennadii; Baart, Fedor; Winsemius, Hessel; Gorelick, Noel; Kwadijk, Jaap; van de Giesen, Nick. "Earth's surface water change over the past 30 years". Nature Climate Change. 2016/09, volume 6, issue 9, page 810-813. Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.SN - 1758-678X
Responsible party Gennadii Donchyts Deltares, Boussinesqweg 1, 2629 HV, Delft, The Netherlands Email:
Metadata creator information EWMI-ODI, No. 43 Street 208, Sanfkat Beng Taing, Khan Daun Penh, Phnom Oenh, Cambodia. Tel: (855) 12-302-967
License unspecified
Copyright Yes
Version 1.0
Date uploaded September 24, 2016, 14:22 (UTC)
Date modified December 17, 2020, 19:20 (UTC)