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==Description==
==Description==


The critical sandpit depth for stratification identifies the maximum depth at which sandpits may begin to experience thermal stratification. This occurs when deeper pits disrupt natural tidal mixing, leading to layers of water with different temperatures and limited oxygen exchange. Understanding these depth thresholds helps in sustainable marine sand extraction, minimizing ecological risks and preserving water quality.  
The critical sandpit depth for stratification identifies the depth at which sandpits may begin to experience thermal stratification. This occurs when deeper pits disrupt natural tidal mixing, leading to layers of water with different temperatures leading to limited oxygen exchange. Understanding these depth thresholds helps in sustainable marine sand extraction, minimizing ecological risks and preserving water quality.  


==MSP Challenge==
==MSP Challenge==


In the MSP Challenge, the Critical Sandpit Depth for Stratification layer highlights depth thresholds where sandpits may disrupt natural water mixing, potentially causing stratification. While this layer is not editable, it provides crucial insights for players to assess environmental impacts and optimize sand extraction strategies while maintaining ecological balance.  
In the MSP Challenge, the Critical Sandpit Depth for Stratification layer highlights depth thresholds where sandpits may disrupt natural water mixing, potentially causing stratification.
 
This layer is not editable, it provides crucial insights for players to assess environmental impacts and optimize sand extraction strategies while maintaining ecological balance.  
   
   
=North Sea=
=North Sea=
This datalayer is an output of the [https://or-else.nl/ OR ELSE] project and is available in the Sand Extraction Edition and in the Digitwin Edition.


== Sand Extraction Edition ==
== Sand Extraction Edition ==
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===Data Source===
===Data Source===
This layer was provided by partners from the ORELSE project.
This layer was provided by partners from the ORELSE project.
Creator: Mohammad Daliri (NIOZ).


===Original Title===
===Original Title===
Critical Sandpit Depth for Stratification Map - Southern North Sea  
Critical Sandpit Depth for Stratification Map - Southern North Sea - April 2025


===Description===
===Description===
This dataset represents spatial distribution of critical sandpit depths (in meters) estimated for the onset of water column stratification across a model domain in the Southern North Sea. Output based on hydrodynamic simulations conducted in GETM.
This layer represents spatial distribution of critical sandpit depths (in meters) estimated for the onset of water column stratification across a model domain in the Southern North Sea. Output based on hydrodynamic simulations conducted in GETM.
 
Derived from GETM (GeneralEstuarine Transport Model) simulation outputs, forced by ECMWF ERA-5 meteorology, TOPEX-P.  


===Creation Date===
===Creation Date===
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This layer is not present in the Eastern Mediterranean Sea.<headertabs />
This layer is not present in the Eastern Mediterranean Sea.<headertabs />
[[Category:Environmental conditions]]

Latest revision as of 09:29, 12 January 2026

Critical Sandpit Depth
NS criticalsandpitdepth.png
Layer Info
Category Management
Sub-category Environmental Conditions
Editable No

Description

The critical sandpit depth for stratification identifies the depth at which sandpits may begin to experience thermal stratification. This occurs when deeper pits disrupt natural tidal mixing, leading to layers of water with different temperatures leading to limited oxygen exchange. Understanding these depth thresholds helps in sustainable marine sand extraction, minimizing ecological risks and preserving water quality.

MSP Challenge

In the MSP Challenge, the Critical Sandpit Depth for Stratification layer highlights depth thresholds where sandpits may disrupt natural water mixing, potentially causing stratification.

This layer is not editable, it provides crucial insights for players to assess environmental impacts and optimize sand extraction strategies while maintaining ecological balance.

This datalayer is an output of the OR ELSE project and is available in the Sand Extraction Edition and in the Digitwin Edition.

Sand Extraction Edition

Types

  • 0 - 5 m
  • 5 - 7 m
  • 7 - 9 m
  • 9 - 11 m
  • 11 - 13 m
  • 13 - 15 m
  • 15 - 20 m
  • 20 - 25 m
  • 25 - 30 m
  • > 30 m

Metadata

Data Source

This layer was provided by partners from the ORELSE project.

Creator: Mohammad Daliri (NIOZ).

Original Title

Critical Sandpit Depth for Stratification Map - Southern North Sea - April 2025

Description

This layer represents spatial distribution of critical sandpit depths (in meters) estimated for the onset of water column stratification across a model domain in the Southern North Sea. Output based on hydrodynamic simulations conducted in GETM.

Derived from GETM (GeneralEstuarine Transport Model) simulation outputs, forced by ECMWF ERA-5 meteorology, TOPEX-P.

Creation Date

04/2025

Methodology

The original file type was NetCDF.

  1. Extracted lat, lon, critical_depth variables into csv through python script.
  2. Csv to points, reprojected and cleaned data (empty points far outside study area)
  3. Preformed TIN interpolation
  4. Clipped raster to mask based on the extent of original points
  5. Reclassified by table

Not applicable.

This layer is not available in the Baltic Sea Edition.

Not applicable.

This layer is not available in the Clyde Marine Region Edition.

Not applicable.

This layer is not available in the Adriatic Sea Edition.

Not applicable.

This layer is not present in the Eastern Mediterranean Sea.

Retrieved from "https://knowledge.mspchallenge.info/index.php?title=Critical_Sandpit_Depth&oldid=6451"
This page was last edited on 12 January 2026, at 09:29. Content is available under GPLv3 unless otherwise noted.