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Some of my friends wanted to know about ground water quality. Groundwater quality is grouped into seven cla**** based on electrical conductivity (EC), sodium adsorption ratio (SAR) and residual sodium carbonate (RSC) and the guidelines for suitability of irrigation are given below.
Guidelines for groundwater suitability for irrigation
S No |
Water quality |
EC (dS/m) |
SAR (m-mol/l)1/2 |
RSC (me/l) |
1. |
Good |
< 2 |
< 10 |
< 2.5 |
2. |
Saline |
|||
· Marginally saline |
2-4 |
< 10 |
< 2.5 |
|
· Saline |
> 4 |
< 10 |
< 2.5 |
|
· High SAR saline |
> 10 |
< 2.5 |
||
3. |
Alkali waters |
|||
· Marginally alkali |
< 4 |
< 10 |
2.5- 4.0 |
|
· Alkali |
< 4 |
< 10 |
> 4.0 |
|
· Highly alkali |
Variable |
> 10 |
> 4.0 |
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