Wet.
When standing on a headline the water is at the bottom of what your standing on.
It is standing water (a pond or puddle for example) as distinct from running water (such as a stream or river). Water temporarily stored, such as in your cold water cistern in your house, would not be considered as standing water, for it is replenished frequently.
Standing water is caused by the drain being plugged up.
Mosquito's lay their eggs in standing water.
mosquitoes breed and lay eggs on standing water
Standing bodies of water are those which have no movement. This promotes the growth of bacteria, algae, and mosquitoes within the water.
Circulating water in a standing water ecosystem can affect the ecosystem. This is because it can change the PH of the water killing the existing organisms.
flowing water and standing water
In the ocean
below you
.
standing surface water