Artificial concrete pools are constructed for raising water garden.
The wall and bottom of such pools should be at least 15 cm thick and fully waterproof.
The depth should be one meter. This depth is enough to grow most of the aquatic plants requiring deep water.
Provision should be made for an outflow pipe laid horizontally at the bottom for completely draining out the pool.
The bottom of the pool should be placed at such a level that water empties through gravitation.
The end of the out flow pipe should run well inside the pool and fitted with a stop cock.
Behind this stop cock there should be a branch of the drain pipe with its open end rising vertically within15 cm of the rim of the pool an inlet pipe is also inserted into the pool
To fill up the pool the inlet should be opened. When the pool is filled up the excess water would get out through the open end of the vertical branch of the drain pipe, thus avoiding overflow.
For emptying the pool when necessary, the stop cock of the drain pipe should be opened. Thus both filling and emptying of the pool could be done at ease.
The location of the pool should be far away from trees, as they would cast their shade and drop the leaves into the pond. Besides, their roots may damage the walls.
An inner concrete wall, 70 cm high, is then constructed 1 meter away and paralled to the wall of the pond and the space between the two walls is filled with manured soil in a sloppy manner.
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