I%26#039;ve been wondering this for a long time how come that when you make a hole in the ground and fill it with water to simulate a lake, the water sips down to the ground. but when in the real thing, it doesnt?

Best Answer

When you dig - you are only going through the topsoil. This is naturally free draining.

Lakes and ponds are based on the subsoil - usually a compacted clay or rock - which are impervious, so the water just sits. The natural groundwater also has it%26#039;s own level - so a hole any deeper will fill up naturally.

Asker's Rating:

oh thanks, my mind is OK now :D

Other Answers (1)

• Mr.P is somewhat right. It depends on the ground and how it perks. When a septic system is being installed they will do a perk test to check drainage. If the ground is clay{or something like} it won%26#039;t drain very good, if it is sand{or something like} it will drain to fast. Location and soil is what determines weather you%26#039;ll have a pond lake or just a big hole in the ground