Peat Stability Seminar – October 2010 Geological Survey of Ireland geophysics and peat site assessment Introduction Peat Thickness Determination Surface Topography Peat Base Topography Internal Peat Structure SSuubb PPeeaatt AAsssseessssmmeenntt Soil Type Soil Strength Conclusions geophysics and peat site assessment peat assessment using GPR resource assessment BNM peat thickness determination 35,000 Ha windfarm developments Ireland and Scotland turbine bases aacccceessss rrooaaddss Infrastructure projects road and rail Academic studies geophysics and peat site assessment BNM peat thickness determination (cid:1) LIDAR data on 2m grid over 69,000 Ha (cid:1) GPR data over c. 35,000Ha (cid:1) 100MHz profile every 4th production field (cid:1)(cid:1) 00..22mm ttrraaccee iinntteerrvvaall (cid:1) RTK positional data (cid:1) physical soundings (cid:1) c. 25km/h acquisition geophysics and peat site assessment interpretation probing GPR signature topography peat shell marl multiple geophysics and peat site assessment interpretation probing GPR signature topography peat gravels geophysics and peat site assessment interpretation probing GPR signature topography peat blue/grey plastic clays geophysics and peat site assessment interpretation probing GPR signature topography shell marl gravels grey plastic clay geophysics and peat site assessment interpretation probing GPR signature topography peat shell marl gravel bbaannkk plastic clay geophysics and peat site assessment Introduction Peat Thickness Determination Surface Topography Peat Base Topography Internal Peat Structure SSuubb PPeeaatt AAsssseessssmmeenntt Soil Type Soil Strength Conclusions geophysics and peat site assessment