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Hydrological analysis

GIS Data Search. Algorithms for Creating a Triangulated Irregular Network.

Assignment Instructions

⚠️ Work Environment

On university computers, work inside the folder:
C:\Users\Public\ or C:\Users\Public\Documents
(This is recommended even on personal computers, as the program may encounter issues when files are located elsewhere.)

📦 Required Software

  • ArcGIS – Required ✅
  • Google Earth – Optional (depending on the task) ✅

Warning

Do not delete completed work until the end of the semester.

Danger

File Naming Rules

❌ Incorrect:

Giorgi Kapanadze.Group/1$ work1

❌ Do not use:

  • Georgian characters (ა, ბ, გ, დ, etc.)
  • Special symbols (other than an underscore _)

✅ Correct:

Giorgi_Kapanadze_Group_4_work_1

Tip

Use only Latin letters, numbers, and underscores (_) for:
Archive names, folder and file names, and table column names.

📘 Step-by-Step Guide

Note

You must be authorized (logged in) on elearning.gtu.ge to download the data.

  • We are using a DEM & TIN task as part of this exercise.
  • Rename main folder from DEM & TIN to Hydrological analysis. Example "Giorgi_Kapanadze_Group_4_work_8_hydrological_analysis"
  • Download Basemap files from here
  • Download nesecery Raster DEM files from here
  • Download geodatabase of Georgia from here
  • Inside it, create the following subfolders:
  • SRTM
graph LR
  A[FirstName_LastName_GroupNumber_Assignment_Number] --> B{Archive};
  A[FirstName_LastName_GroupNumber_Assignment_Number] --> C{Project};
  A[FirstName_LastName_GroupNumber_Assignment_Number] --> D{lyr};
  A[FirstName_LastName_GroupNumber_Assignment_Number] --> E{shp};
  A[FirstName_LastName_GroupNumber_Assignment_Number] --> F{Geodatabase};
  A[FirstName_LastName_GroupNumber_Assignment_Number] --> G{Style};
  A[FirstName_LastName_GroupNumber_Assignment_Number] --> H{Topology_rules};
  A[FirstName_LastName_GroupNumber_Assignment_Number] --> I{Raster};
  I --> J{DEM};
  I --> K{SRTM};

Connect ArcGIS (from ArcCatalog) to this main folder.

  • Import raster data and merge them, don't change raster projection from WGS 84. Check it!
  • Import municipalities layer from geodatabase
  • Clip this raster with one municipality border of Georgia
  • Start use of hydrology tools on the clipped municipality dem :
  • Flow Direction, Sink, Fill, Flow Accumulation, Stream order, Stream to feature, Basin, Watershed
  • Save all of them in geodatabase as a grid format
graph TB
    A[Start - DEM] --> B{Initial Flow Direction}
    B -->|8 Directions| C[Flow Direction]
    B -->|More than 8 directions| E[Sink Detected]
    C --> D[Flow Accumulation]
    E --> F[Fill Sinks]
    F --> C
    D --> G[Stream Order]
    D --> H[Stream To Feature]
    C --> I[Watershed]
    C --> J[Basin]
  • Compress (zip) your folder (named after your first and last name). 💾
  • Use formats like .rar or .zip.

  • Name the archive as:
    FirstName_LastName_GroupNumber_Assignment_Number

  • Send it to: giorgi.kapanadze@gtu.ge

Warning

If you experience any issues with the submission process, contact:
giorgi.kapanadze@gtu.ge
Or use any file transfer services.

Info

📌 If anything is unclear, feel free to ask! 😊
If something here was done incorrectly, I’ll correct it — or you can create a pull request.