The parameters, metrics and indicators to be determined are established in the DMA and the annexes of Royal Decree 817/2015. The following table shows the quality indicators established for the evaluation of each quality element with its associated sampling frequency (for more information on the indicators analyzed in the scope of the CHS, consult the “Reports on the status of surface water bodies< /a>” available in the Reports section):
ELEMENTS OF QUALITY |
FREQUENCY |
RIO |
LAKE |
||
---|---|---|---|---|---|
BIOLOGICAL |
Phytoplankton |
1m/year |
2m/year |
||
Other aquatic flora - diatoms |
1m/year |
- |
|||
Other aquatic flora - macrophytes |
1m/year |
1m/year |
|||
Macroinvertebrates |
1m/year |
1m/year |
|||
Fish |
1m/year |
1m/year |
|||
GENERAL CHEMICALS AND PHYSICOCHEMICALS |
Thermal conditions |
4m/year
|
4m/year
|
||
Oxygenation |
|||||
Salinity |
|||||
Acidification status |
|||||
Nutrient status |
|||||
HYDROMORPHOLOGICAL |
Continuity of the river |
1/cycle |
- |
||
Hydrological regime |
1/cycle |
||||
Morphology |
|||||
COMPOSITES |
Contaminants discharged in significant quantities |
; |
4m/year |
||
Priority substances discharged |
12m/year |
12m/year |
|||
m: sampling cycle: hydrological planning cycle (duration of 6 years) Surveillance control program: TRIENNIAL periodicity Operational control program: ANNUAL periodicity |
The sampling and analysis techniques applied follow the protocols in force at all times approved by the Ministry for the Ecological Transition and the Demographic Challenge:
In the monitoring programs, other additional parameters are analyzed that are not established by the regulations, such as other metals, emerging contaminants, compounds on the Watch list (Execution Decision 2018/840 of June 5, 2018), etc.< /p>
The sediment and biota matrices are analyzed annually according to the frequency and parameters established in Royal Decree 817/2015.