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Building with Nature Guideline > Toolbox > Impact Assessment > Interactive Dredge Planning Tool - Singapore

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Interactive Dredge Planning Tool - Singapore

Type: Model

Project Phase: Initiation, Planning and Design

Purpose: Quick design assessment for ecological effects of dredging suitable for stakeholder engagement

Requirements: Knowledge on dredging operations; MapTable hardware for interactive modelling if desired

Relevant Software: OpenEarth Viewer (web application) or OpenEarth (requires Matlab)




Dredging and other human-induced increases in turbidity levels and sedimentation rates may impact coastal ecosystems such as coral reefs and seagrass meadows. The Interactive Dredge Planning Tool (IDPT) is able to perform a rapid assessment of the expected, initial ecological effects caused by interactively defined dredging operations. For this, the IDPT makes use of rapid assessment dredge plume modelling, a database with computed hydrodynamic background conditions and a database with ecological information, i.e. locations, species and species tolerance information. The effect of this increased turbidity and sedimentation on the ecosystems is site and species specific, but has been addressed for certain species in Singapore in different projects within the Building with Nature programme.

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How to Use

This tool is easy to use for rapid assessments of the expected direct environmental effects of dredging operations. The user interface is easy to use and enables defining and evaluating different dredging scenarios. Clearly, the proper interpretation of results requires a certain level of knowledge on dredging operations, ecology and the models and databases underlying the tool. This sections provides more details on the following:

  1. Requirements
  2. Working Principles
  3. Functioning of the IDPT protoype version
  4. Developing a case with the IDPT
  5. SWOT Analysis
  6. Lessons Learned

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Practical Applications

The practical application of the IDPT tool will be explained with a case study from Singapore:

  1. Introduction to the case study Singapore
  2. Study site
  3. Reclamation and dredging methods
  4. Schematisation of the sediment source terms using TASS
  5. Schematisation of dredging operations and site conditions
  6. Description of hydrodynamic models and tests
  7. Evaluation of IDPT results
  8. Lessons learned

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