Metadata 1533

A palaeo-alluvial plain is defined as a largely flat landform created by the repeated deposition of alluvial sediments over a long period of time by running water. Chronological information is presented as calendar age BP. Confidence is defined as follows: 1. High: Sampled feature with good age and palaeoenvironmental control. 2. Sampled feature with poor or none age and palaeoenvironmental control. 3. Constructed by remote sensing data only. 4. Low: Reasonable without any direct evidence.

Palaeocoastline polyline features delineating former coastlines and shorelines subdivided into those which have been mapped (direct observation) or modelled. Chronological information is presented as calendar age BP. Confidence is defined as follows: 1. High: Sampled feature with good age and palaeoenvironmental control. 2. Sampled feature with poor or none age and palaeoenvironmental control. 3. Constructed by remote sensing data only, 4. Low: Reasonable without any direct evidence

This is PSI data for Palermo, Italy. It has been provided by TRE as part of the ESA funded Terrafirma project.

Difference between the maximum and minimum annual average temperature

Annual average ground surface temperature in Europe. The values are based on the Air Surface Temperature and the temperature variation due to elevation.

Thermal conductivity values from VDI 4640 of the outcropping lithology in Europe.

The A layer represents aquifer media with direct assignment of A index values for each aquifer material according to the proposal of the HOVER project. The aquifer media scoring was applied to IHME1500 lithology level 2 information.

The C layer represents the hydraulic conductivity of IHME1500 Level 2 legend classes averaged from literature data with direct assignment of the C index following the classification proposal of the HOVER project.

The D layer represents depth to groundwater table from the surface, reclassified to D index values from 1 to 10 according to class breaks proposed by Aller et al. (1987).

DRASTIC represents the groundwater pollution potential of the upperemost aquifer systems over Europe in five classes 1 - 5 (very low, low, moderate, high, very high) on a 1 km pixel basis. The DRASTIC index according to Aller et al. (1987) is constituated as a weighted linear sum of seven environmental parameters (Depth to water table, Net recharge, Aquifer media, Soil media, Topography/slope, Impact of vadose zone media, Hydraulic conductivity) with parameter classes scored from 1..10 for their specific i...