| Time |
Pacific Standard Time on a 24-hour clock |
| Temp |
Temperature of water at time of sampling in degrees Celsius (C)
and degrees Fahrenheit (F)
|
| pH |
Measure of acidity (<7) or alkalinity (>7) of water |
| EC ( S/cm) |
Electrical conductance in microsiemens per centimeter at 25 C |
| TDS (mg/L) |
Gravimetric determination of total dissolved solids at 180 C |
| SAR |
Sodium adsorption ratio (developed by U.S. Salinity Laboratory): |
| |
SAR = Na/(((Ca)+(Mg))/2)^(1/2) |
| |
Na, Ca, and Mg represent the concentrations
in milliequivalents per liter. |
| Geometric Mean |
The geometric mean G of a set of N numbers X1,
X2, X3, . . ., XN is the Nth root of the product of the numbers: |
| |
G = (X1 X2 X3 . . . XN)^(1/N) |
|
Quantity |
To Convert from Metric Unit |
To Customary Unit |
Multiply
Metric Unit
by |
Convert to
Metric Unit
Multiply
Customary Unit by |
|
Length |
millimeters (mm)
centimeters (cm)
metros (m)
kilometers (km) |
inches (in)
inches (in)
feet (ft)
miles (mi) |
0.03937
0.3937
3.2808
0.62139 |
25.4
2.54
0.3048
1.6093 |
|
Area |
square millimeters
square metros (m^2)
hectares (ha)
sq. kilometer (km^2) |
sq. inch (in^2)
sq. feet (ft^2)
acres (ac)
sq. mile (mi^2)
|
0.00155
10.764
2.4710
0.3861 |
645.16
0.092903
0.40469
2.590 |
|
Volume |
liters (L)
megalitres
cubic meters (m^3)
cubic meters (m^3)
cubic decameters |
gallons (gal)
million gallons
cubic feet (ft^3)
cu. yards (yd^3)
acre feet |
0.26417
0.26417
35.315
1.308
0.8107 |
3.7854
3.7854
0.028317
0.76455
1.2335 |
|
Flow |
cu.mtrs/sec.(m^3/s)
liters/minute (L/min)
liters per day (L/day)
megalitres per day
dam^3/day
|
cfs
gpm
gal/day
mgd
ac-ft/day
|
35.315
0.26417
0.26417
0.26417
0.8107
|
0.028317
3.7854
3.7854
3.7854
1.2335
|
|
Mass |
kilograms (kg)
megagrams (Mg) |
pounds (lb)
tons (2,000 lb) |
2.2046
1.1023 |
0.45359
0.90718 |
|
Velocity |
meters/sec.(m/s) |
feet/sec.(ft/s) |
3.2808 |
0.3048 |
|
Power |
kilowatts (kW) |
horsepower (hp) |
1.3405 |
0.746 |
|
Pressure |
kilopascals (kPa)
kilopascals (kPa) |
psi
ft. head of water |
0.14505
0.33456 |
6.8948
2.989 |
|
Specific Capacity
|
L/min per meter
drawdown |
gpm per
foot drawdown
|
0.08052 |
12.419 |
|
Concentration |
mg/L |
ppm |
1.0 |
1.0 |
|
Electrical Conductivity
|
microsiemens/cm |
micromhos/cm |
1.0 |
1.0 |
|
Temperature
|
(C) |
(F) |
(1.8xC)+32 |
(F--32)/1.8 |
