Padding layer for athletic field for water retention and drainage

A panel for use in a padding layer of a panel system, comprising:

• a flat surface;
• at least one water accumulation region positioned at or near a perimeter of the panel, the at least one water accumulation region being defined by:
• a plurality of projections projecting from a pyramidal surface;
• and
• a ridge projecting from the pyramidal surface, the ridge extending along a perimeter of the panel and formed integrally with at least a portion of the plurality of projections positioned at or near the perimeter of the panel, wherein the ridge has a projection height sufficient to retain water at the perimeter of the panel.

A panel for use in a padding layer of a panel system, comprising:

• a flat surface;
• a plurality of water accumulation regions positioned on the flat surface, the plurality of water accumulation regions being defined by:
• a horizontally-extending rib extending from a first side of the panel to a second side of the panel;
• a vertically-extending rib extending from a third side of the panel to a fourth side of the panel;
• and
• a ridge projecting from the flat surface, the ridge extending along a perimeter of the panel, wherein the ridge has a projection height sufficient to retain water at the perimeter of the panel and wherein the projection height is the same as a height of at least a portion of a projection projecting from the flat surface.