The pressure drop across a clean sand bed is usually very low.

Water comes out by digging about a foot into the sand bed.

In dry season one may have to walk a considerable distance over the sand bed, to get to the boat.

Spawning takes place on a smooth rock or clean sand bed.

In summer, their sand beds are almost always dry.

Where water filtered through sand beds was a tall space with high windows.

The white sand bed which once had a height of several feet above the water level was a marvellous sight, especially during full moon days.

When the sand bed is compacted, you can start laying the stones.

But it will be easier to level the stones and create better drainage if you construct a sand bed first.

A sand bed filter is a kind of depth filter.

However, once you have a prepared site - a sand bed, or concrete base, the slabs can generally be laid very quickly.

They are seated on the dry sand bed.

During the extended dry season, the river loses its surface water, although water may remain in the sand bed.

Primitive brook lampreys prepare to breed by making a sand bed.

An ideal tank set-up is fish only or reef aquarium with sand bed.

Sand bed filters are an example of a granular loose media depth filter.

A deep sand bed is a filtration method used in some saltwater aquariums.

For a pressurised rapid sand bed filter this occurs when the pressure drop is around 0.5 bar.

Overall, there are several categories of sand bed filter:

Deep sand bed filters are another filtration method.

These carnivore sea snails live on rocky shores and sand beds.

Clay lumps are common, and sand beds gradually transition to clay.

Attendees sit on the sand bed, (old & invalid people are given chairs) with separate seating arrangements for men and women.

No need for any seating arrangement as people can sit on the neat white sand bed under roof made by knitted coconut leaves.

Some common types of filtration involving the substrate include the undergravel filter and the deep sand bed.