|
Abbr
|
Subject
and area of interest |
|
A
|
area (cross-section dike,
canal; surface) |
|
AI
|
active ingredient (chemicals) |
|
Avg.
|
average (length, weight …of fish) |
|
Az
|
azimuth (topography) |
|
B
|
biomass (fish stock) |
b |
bottom width (canal) |
BL |
breaking load (chains, cables, ropes) |
BM |
bench-mark (topography) |
|
BS |
backsight (topography) |
C |
|
carbon |
C/N |
|
ratio carbon to nitrogen (organic material) |
Ca |
|
calcium |
Ca CN2
|
|
calcium cyanamide |
CaCO3
|
|
calcium carbonate |
CaO |
|
calcium oxide, quicklime |
Ca(OH)2
|
|
calcium hydroxide, hydrated lime |
|
CH
|
|
construction height (dike) |
|
CI
|
|
contour interval (topography) |
CO2
|
|
carbon dioxide |
cos |
|
cosine (angle measurement) |
d |
horizontal diagonal of netting mesh ( net) |
|
dd
|
degree-day (eggs incubation, larval rearing) |
|
dh
|
degree-hour (ovulation period in female fish) |
D |
inside diameter (pipeline) |
D |
depth of net |
|
D10
|
effective size of soil particles |
|
DFR
|
daily feeding rate (fish stock) |
|
DH
|
design height (dike) |
|
DM
|
dry matter (manure) |
DO |
dissolved oxygen |
|
E
|
efficiency (pump) |
|
E
|
hanging ratio (fishing net) |
E(A) |
elevation/height/altitude of point A (topography) |
|
FB
|
freeboard (dike, canal) |
|
FCR
|
food conversion ratio |
|
FS
|
foresight (topography) |
GRP |
glass-reinforced plastic (fish rearing tank) |
H |
head, head loss (hydraulics) |
h |
height (dike, fill …) |
h |
depth (water, excavation/cut) |
|
hd
|
delivery head (pump) |
HI |
height of the instrument (topography) |
|
hp
|
pipe loss head (pump) |
|
hs
|
suction head (pump) |
|
K
|
coefficient of permeability (soil) |
K |
potassium (chemical) |
|
K
|
water conveyance factor (pipeline) |
|
K2O
|
potash (inorganic fertilizer) |
L |
|
length (pond, dike, pipeline…) |
|
LL
|
|
liquid limit (soil) |
ln |
|
Napierian/natural logarithm |
|
LR
|
|
loading rate (fish transport) |
LS |
|
levelling station(topography) |
|
LW |
|
live weight (animals) |
|
M
|
water velocity modulus (pipeline) |
|
M
|
mounting interval (seine net) |
N |
nitrogen |
|
n
|
roughness coefficient (pipe/canal walls) |
|
NH3
|
free ammonia |
|
NO3
|
nitrate |
O
|
outlet (pond) |
|
O2
|
oxygen (air, water) |
P |
phosphorus (chemical) |
|
P
|
power (pump) |
|
P
|
wetted perimeter (pipe/canal) |
PE |
polyethylene (netting, plastic membrane) |
|
pH
|
degree of acidity/alkalinity (water) |
|
pH
|
degree of acidity/alkalinity (soil) |
|
PI
|
plasticity index (soil) |
|
PL
|
plastic limit (soil) |
|
PO4
|
phosphate |
|
P2O5
|
phosphoric acid (inorganic fertilizer) |
|
PSF
|
particle-size frequency (curve …for soil) |
PVC |
polyvinylchloride (floats, pipeline, membrane) |
Q |
water carrying/discharge capacity (pipe, canal) |
|
R
|
hydraulic radius (canal) |
|
S
|
longitudinal slope (canal bottom) |
s |
length of mesh side, mesh bar size (fishing
net) |
|
SA
|
settlement allowance (soil) |
|
SD
|
Secchi disc transparency (water) |
SD |
slope of dry side (dike) |
SF |
safety factor (chains, cables, ropes) |
sin |
sine (angle measurement) |
SW |
slope of wet side (dike) |
|
SWL
|
safe working load (chains, cables, ropes) |
t° |
temperature (air, water) |
|
TA
|
total alkalinity (water) |
tan |
tangent (angle measurement) |
|
TBM
|
temporary bench-mark (topography) |
|
TEL
|
total equivalent length (pipeline) |
|
TP
|
turning point (topography) |
|
TSS
|
total suspended solids (water) |
|
U
|
uniformity coefficient (soil) |
|
USC
|
Unified Soil Classification |
|
USDA
|
United States Department of Agriculture (soil) |
V |
velocity (water) |
V |
volume (dike, pond, material …) |
|
Vc
|
horizontal critical velocity (soil particles
in water) |
Vmax |
maximum velocity (water in pipelines, canals) |
|
Vs
|
settling velocity (soil particles in water) |
W |
width (pond) |
W
|
weight (material, chemicals …) |
|
z
|
slope of side walls (dike, canal) |
|