HYDRO-SPY: GO WITH THE FLOW

TERMS

100

Two types of infiltrometer

flooding type, rainfall simulators

200

The volume of water that the ground can hold

FIELD CAPACITY

300

The rate at which soil is able to absorb rainfall or irrigation

INFILTRATION RATE

400

The most commonly used flooding type infiltrometer. It consists of 2 concentric rings driven into soil

Double Ring Infiltrometer

500

The infiltrated water first meets the soil moisture deficiency, if any, and excess water moves vertically downwards to reach the groundwater table, what is this vertical movement called?

Percolation

TRIVIA

100

The zone where soil moisture will be at or near field capacity and the moisture content decreases with the depth.

wetting zone

200

It is a shallow linear ditch that is filled with stone to create a narrow underground reservoir. 

infiltration trench

300

Water can change from a solid to a gas, without becoming a liquid first. Through this process of ________ our planet's ice can evaporate directly into the air without melting!

sublimation

400

The diameter and length of the metal cylinder for single ring infiltrometer

25cm-30cm, 50cm-60cm respectively

500

Name the 4 moisture zones in the infiltration process and briefly explain each zone.

saturation-absorption limitation of soil

transition-water infiltrating from the surface moves downward and its characteristics begin to shift

transmission-characterized by a small change in water content with depth

wetting zone

FORMULA

100

HORTON'S EQUATION

fp=fc+(fo-fc)e^-Kht

200

PHILIP'S EQUATION

fp=1/2st^-1/2+K

300

KOSTIAKOV EQUATION

Fp=at^b

400

GREEN-AMPT EQUATION

fp=K(1+∆θSc/Fp)

500

COMULATIVE INFILTRATION CAPACITY

Fp= ∫^t₀fp(t)dt