Number (In Section 4, octet 11) 
Parameter  Units 
Abbrev 

0 
Water Depth  m 
WDPTHIL 
1 
Water Temperature  K 
WTMPIL 
2 
Water Fraction  Proportion 
WFRACT 
3 
Sediment Thickness  m 
SEDTK 
4 
Sediment Temperature  K 
SEDTMP 
5 
Ice Thickness  m 
ICTKIL 
6 
Ice Temperature  K 
ICETIL 
7 
Ice Cover  Proportion 
ICECIL 
8 
Land Cover (0=water, 1=land)  Proportion 
LANDIL 
9 
Shape Factor with Respect to Salinity Profile  SFSAL 

10 
Shape Factor with Respect to Temperature Profile in Thermocline  SFTMP 

11 
Attenuation Coefficient of Water with Respect to Solar Radiation  m^{1} 
ACWSR 
12 
Salinity  kg kg^{1} 
SALTIL 
13  Cross Sectional Area of Flow in Channel  m^{2}  CSAFC 
14  Snow temperature  K  LNDSNOWT 
15  Lake depth  m  LDEPTH 
16  River depth  m  RDEPTH 
17  Floodplain depth  m  FLDPDEPTH 
18  Floodplain flooded fraction  proportion  FLDPFLFR 
19  Floodplain flooded area  m^{2}  FLDPFLAR 
20  River Fraction  proportion  RVERFR 
21  River area  m^{2}  RVERAR 
22  Fraction of river coverage plus river related flooding  proportion  FRCRF 
23  Area of river coverage plus river related flooding  m^{2}  ARCRF 
24191 
Reserved  
192254 
Reserved for Local Use 

255 
Missing 
Notes: (1) When a new parameter is to be added to Code table 4.2 and more than one category applies, the choice of category should be made base on the intended use of product. The discipline and category are an important part of any product definition, so it is possible to have the same parameter name in more than one category. For example, "Water Temperature" in discipline 10 (Oceanographic Products), category 4 (subsurface properties) is used to reporting water temperature in the ocean or open sea, and is not the same as "Water temperature" in discipline 1 (Hydrological Products), category 2 (Inland water and sediment properties) which is used for reporting water temperature in freshwater lakes and rivers. 