Map-based workflow
All analyses are tied to map layers, allowing you to interpret liquefaction potential directly across the project area.
Web-Based Liquefaction Assessment
A web platform for spatial liquefaction assessment
LiqSys is a web-based GIS platform for project-scale liquefaction assessment, combining field data, engineering calculations, and spatial visualization in a single workflow.
GIS-based Workflow
Project data and results are managed through a map-based interface.
SPT, CPT and MASW
Supports structured field data used in geotechnical site characterization.
Automatic Maps
Generates ground types, peak ground acceleration, and groundwater level maps from project inputs.
What is LiqSys?
A digital geotechnical environment for spatial liquefaction evaluation
LiqSys combines geotechnical analysis logic with a user-friendly web interface. Its purpose is to transform field data into interpretable project-scale outputs rather than leaving them as isolated tables, individual profiles, or disconnected engineering calculations.
Purpose
To support faster, more systematic, and spatially meaningful liquefaction assessment workflows.
To support faster, more systematic, and spatially meaningful liquefaction assessment workflows.
Data foundation
The platform works with SPT, CPT, and MASW data within a project-based geotechnical workflow.
The platform works with SPT, CPT, and MASW data within a project-based geotechnical workflow.
Engineering focus
It is designed to connect research-based methodology with practical geotechnical decision support.
It is designed to connect research-based methodology with practical geotechnical decision support.
Unified project data
Field data, project boundaries, and analysis parameters are managed in a single structure without fragmented files.
Engineering outputs
Results are generated as engineering parameters and hazard indices that can be directly used in reports and evaluations.
Repeatable analysis
Projects can be recalculated and updated consistently as input data or assumptions change.
Core Capabilities
Key functions that define the platform
The cards below summarize the current functional scope of LiqSys and communicate the platform logic clearly to first-time visitors.
SPT, CPT and MASW Data Management
Geotechnical field data can be uploaded in structured format and directly used in project-based analysis workflows without additional preprocessing.
Liquefaction Analyses
Liquefaction triggering is evaluated using established simplified procedures (Boulanger and Idriss, 2014; Youd et al., 2001), integrated within the project workflow.
Spatial Result Maps
Analysis results are generated as continuous spatial layers, enabling direct interpretation of liquefaction severity across the project area.
Lateral Spreading Estimation
Estimated lateral spreading displacements are computed based on empirical relationships and integrated with spatial hazard mapping.
Automatic Engineering Layers
Ground types, PGA, and groundwater level maps are automatically derived from input data and analysis parameters.
Project-specific Workspace
Each project is managed within its own boundary, data structure, and analysis environment, ensuring consistency across all calculations and outputs.
How It Works
A simple project-based engineering workflow
Showing the workflow on the landing page helps users understand the structure of the platform before signing in and starting a project.
Create a project
Define the study area, project boundary, and main input parameters.
Upload field data
Add SPT, CPT, MASW, and related geotechnical data to the platform.
Run analyses
Execute the selected workflows and generate engineering outputs.
Review maps and results
Interpret indices and thematic layers across the project area.
01
Project Setup
A project-based structure keeps data and outputs organized within the same environment.
02
Data Ingestion
Standardized input reduces the risk of fragmented or mismatched geotechnical data.
03
Computation
Engineering calculations are digitalized to improve speed, consistency, and repeatability.
04
Visualization
Spatial presentation of results strengthens project-scale engineering interpretation.
Academic Use
How to reference LiqSys
Use the citation below when your analysis or results are based on LiqSys.
Cicek, F., Toprak, S., (2026), "LiqSys: Web-Based Geographic Information System for Liquefaction Assessment and Spatial Analysis", Gebze Technical University, Available at: https://liqsys.gtu.edu.tr
Adjust the format if required by your thesis, journal, or report guidelines.
Why cite it
Links your results to a traceable and reproducible analysis workflow.
Where to use it
Include in theses, papers, and reports that rely on LiqSys-based evaluations.
Before submission
Verify author names, year, and platform link match your final version.
Copy and use
Paste directly into your reference list and format if required.
Platform Access
Access LiqSys, create an account, or download the guide
User Guide
A downloadable PDF guide can explain the platform screens, data logic, and engineering workflow.
Sample Data Template
Use the sample template to prepare input files before creating a project.
Quick Start
Start with a short walkthrough to understand the basic project workflow.
About
LiqSys Development
LiqSys has been under development since 2024 as a web-based platform created to support geotechnical liquefaction assessment through a structured, map-oriented workflow. The platform is being developed by Furkan Çiçek as part of a graduate research study under the supervision of Prof. Dr. Selçuk Toprak, within the scope of the MARTEST project.
Differentiation
Unlike conventional tools, LiqSys integrates data input, engineering analysis, and spatial visualization in a single web-based environment.
System Architecture
Built with a PHP-based back-end and GIS-oriented web architecture designed for project-scale geotechnical workflows.
Project Scope
LiqSys combines liquefaction assessment, mapping, and estimated lateral spreading evaluation within a single web-based environment.