When the overall lot drainage is toward the house what can be used to direct the water away from home is it swales sweles swails swells?
The area of land around buildings should be formed so that any
surface water in the immediate surroundings (extending at an
absolute minimum of 0.5m (20") beyond the building) is directed
away from the building. This can be done by sloping the land at at
least 1 in 50/2%/1.15 degrees or more, or by having drainage
channels around the perimeter. (Check local authority
regulations.)
The water diverted away from the immediate surrounds of the
building by slopes or drains then needs to be able to flow away
further so that it does not back up to the building. Swales, drains
and slopes can all achieve this.
A swale is a wide concave vegetated channel that allows slow
surface flow of water and also allows the water to soak gradually
into the soil, reducing the chance of a large peak flow of water,
and recharging the water table. The vegetation must be maintained
to ensure water can flow through the swale, and the swale will need
to carry any water beyond the capacity it can immediately absorb to
a stormwater system or waterway.