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A global coastal permeability dataset (CoPerm 1.0).

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|August 17, 2024
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A new global dataset, CoPerm 1.0, maps coastal permeability, crucial for understanding groundwater flow and protecting freshwater resources from saltwater intrusion. This dataset aids sustainable management of vital coastal aquifers worldwide.

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Area of Science:

  • Hydrogeology
  • Coastal Geoscience
  • Environmental Science

Background:

  • Coastal groundwater is a vital freshwater resource for communities and ecosystems.
  • Groundwater abstraction in coastal areas risks saltwater intrusion, threatening water quality.
  • Understanding coastal aquifer permeability is essential for sustainable groundwater management.

Purpose of the Study:

  • To present the first global dataset of coastal permeability (CoPerm 1.0).
  • To provide data on landward, shoreline, and seaward permeability along global coastlines.
  • To support global coastal groundwater assessments and studies on submarine groundwater discharge and saltwater intrusion.

Main Methods:

  • Compilation of a global dataset (CoPerm 1.0) covering over two million kilometers of coastline.
  • Inclusion of diverse shoreline characteristics such as cliffs, beaches, mangroves, and muddy coasts.
  • Analysis of permeability variations across landward, shoreline, and seaward zones.

Main Results:

  • CoPerm 1.0 includes data for four million coastal segments globally.
  • Rocky shores are the most common shoreline type, followed by mangroves, beaches, and muddy coasts.
  • Median permeability values differ across zones: shoreline (10⁻¹².³ m²), seaward (10⁻¹³.³ m²), and landward (10⁻¹³ m²).

Conclusions:

  • The CoPerm 1.0 dataset offers crucial input for global and regional coastal groundwater studies.
  • This dataset will enhance assessments of saltwater intrusion risks and submarine groundwater discharge.
  • Understanding coastal permeability is key to ensuring the sustainable use of coastal freshwater resources.