MERI

Landfill Topographic Monitoring

KeeganTIN2012 KeeganTIN2013 KeeganSurfaceDifference Keegan_Landfill_predicted

Participants:  MERI, Natural Resource and Solid Waste Operations

Problem:

Landfills settle and their size and volume change as materials decompose with time. To determine landfill capacity over time continuous monitoring of landfill size and volume is required.

Objective:

Periodically conduct landfill surveys using high resolution LiDAR images and field GPS measurements to determine volume accumulation and settling rates. Compare previous measured volumes and calculate the current capacity of landfills.

Strategy:

Convert elevation and location measurements from LiDAR images and field GPS collected data into GIS readable data and tables. Compute the differences in landfill volume and the final landfill volume via a TIN (Triangulated Irregular Network) using 3D Analyst, an ArcMap extension.

Activities:

  •    Periodically process measurements gathered from remote sensors (LiDAR) the field measurements into a TIN   surface
  •    Run surface difference analysis
  •    Create mock TIN and calculate remaining landfill capacity

Deliverables:

  •   TIN of landfill for a given time period
  •   Landfill volume
  •   Calculate surface difference of landfill from previous years
  •   Determine remaining volume capacity of the landfill.