Saturday, May 26, 2012

Issue 19: Ume Teaches: Water Budget and Water Tables

Ume teaches:

Water Table:
Precipitation of meltwater (melted glaciers) sink into the ground and become ground water.
* Not all water sink down.
Soil Moisture Zone: Plants use to hydrate (There's a lot of moisture in it)

Zone of Aeration-> filled with air. I would say that the soil moisture zone absorbs most of the water and and what's left, sinks down even more into the Zone of Saturation, which is right underneath the zone of aeration.
This is basically ground water stored. Right underneath is impermeable rock (it won't store water nor will it let go)
The water table is basically the height of where the water is being stored.
The capillary fringe is the by the water table.
Roots store water and have pore spaces

To make this easier, a real-life scenario:
I remember when I was younger, maybe 8 or 9 years old, my friends and I, were digging a huge hole, about 3 meters from the ocean. The soil on the top was all wet, for about 8 inches or so. The middle level was all dry so we had to dump water into the hole to  to prevent it from caving in. We dig about 3 feet in and we started finding the water getting stored, so we had to remove it with our buckets. We had reached the zone of saturation. In the end, the hole was 5 feet deep and 5 people could fit in it. Though we never reached the bedrock; it was fun.

A water budget describes how much water comes in and how much is losted.
Income methods: precipitation (rain/snow/sleet/ hail)
Spending method: (Evapotranspiration, run off, use by humans)

Water budget sees if the water table made an increase or decrease from usual.
If water table is higher than the land, it creates a lake:

-Ume

No comments:

Post a Comment