Question

The following questions are related to measuring saturated flow in a given soil. Use the formula for saturated soil discharge and the table below to answer the questions. Be sure and show your work.

Calculate K_sat (cm/sec) using the following measurements (5pts):

A = 113in², t = 15 sec, Q = 150ml, Δh = 66cm, L = 125cm

Using the information from the table below and your calculated K_sat, what is the likely soil texture? (5pts)

K (cm/s)	102	101	1	10-1	10-2	10-3	10-4	10-5	10-6	10-7	10-8	10-9	10-7
Relative permeability	Pervious				Semi-Pervious				Impervious
Aquifer	Good					Poor				None
Unconsolidated Sand and Gravel	Well sorted gravel		Well sorted sand or sand & gravel			Very fine sand, silt, loess, loam
Unconsolidated Clay and Organic					Peat		Layered clay			Fat/Unweathered clay

You were assigned by the local soil conservation district to take some field measurements to help assess the soil water conditions of a given area for potential agricultural usage. The diagram below schematically shows the distribution and depth of tensiometers and lysimeters (used to determine soil moisture content). Data from each tensiometers and lysimeters group is taken from the bottom ( ). Use the table of field data to answer the following questions.

	ΨTot (kPa)	Soil Wetness (cm3/cm3)	Air Porosity (%)	Soil Water Condition
Group A	-20	0.28	15
Group B	-50	0.18	32
Group C	-35	0.22	24
Group D	-25	0.25	22
Group E	-45	0.15	35
Group F	-30	0.12	28

In the space provided in the above data table, label the likely soil water conditions as related to maximum retentive capacity, field capacity, wilting coefficient, and hygroscopic coefficient. (12 pts)