When it is necessary to do the drainage?

Consider cases where drainage is needed in any case.

1. If the site is located on level ground, the drainage is required, since the loss of a large amount of rainfall or snowmelt water will have nowhere to go.

According to the laws of physics always leaves water by gravity to a lower position, and on a level the landscape it will be intensively impregnated soil downward that can lead to waterlogging.

So, from the point of view of the drainage, it is advantageous to have small slope portion.

2. If the site is located in the lowlandsThen drain it definitely needed, as the water will flow from higher to those that are below.

Areas with a strong bias also require drainage as rapidly receding water will wash away the fertile top layer of soil.

It is better to send these streams drains or pipes. Then the main part of the water will go over them to prevent leaching of the soil layer.

3. If the area is dominated by clay and heavy loamy soil after rainfall or melting snow on them will often stagnate water.

Such soils prevent its penetration into the deeper layers. Therefore, drainage is required.

4. If the groundwater level (GWL) on a plot of less than 1 meter, without drainage can not do.

This reduced impressive list becomes clear that the drainage in some extent is needed in most cases.

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