BAL-LV-AA- 006: The BAL-LV Principle for Good Environmental Status was based on the qualitative values ​​of Annex I of the Marine Strategy Framework Directive and on the criteria and methodological standards of Commission Decision 2010/477 / EU for assessing good environmental status in marine waters. Based on the qualitative characterization and criteria of good environmental status, related indicators with quantitative values ​​were chosen, which allow to evaluate the border of GES or non-GES and hence the state of marine waters. The C- section of the evaluation report summarizes the indicators used in Latvia for which a methodology based on scientific experience has been developed for the current development phase of marine assessment and the technical means are available to use these indicators to assess the quality of the environment. The current state of the Latvian marine waters was assessed on the basis of the period 2005-2009 mainly. Using historical data and trend analysis, the target value of the indicator is obtained and, compared to the average value of this indicator for the assessment period, obtains an assessment of the current state, summarized in Section D-.

BAL-LV-AA- 006: The BAL-LV Principle for Good Environmental Status was based on the qualitative values ​​of Annex I of the Marine Strategy Framework Directive and on the criteria and methodological standards of Commission Decision 2010/477 / EU for assessing good environmental status in marine waters. Based on the qualitative characterization and criteria of good environmental status, related indicators with quantitative values ​​were chosen, which allow to evaluate the border of GES or non-GES and hence the state of marine waters. The C- section of the evaluation report summarizes the indicators used in Latvia for which a methodology based on scientific experience has been developed for the current development phase of marine assessment and the technical means are available to use these indicators to assess the quality of the environment. The current state of the Latvian marine waters was assessed on the basis of the period 2005-2009 mainly. Using historical data and trend analysis, the target value of the indicator is obtained and, compared to the average value of this indicator for the assessment period, obtains an assessment of the current state, summarized in Section D-.

BAL-LV-AA- 006: The BAL-LV Principle for Good Environmental Status was based on the qualitative values ​​of Annex I of the Marine Strategy Framework Directive and on the criteria and methodological standards of Commission Decision 2010/477 / EU for assessing good environmental status in marine waters. Based on the qualitative characterization and criteria of good environmental status, related indicators with quantitative values ​​were chosen, which allow to evaluate the border of GES or non-GES and hence the state of marine waters. The C- section of the evaluation report summarizes the indicators used in Latvia for which a methodology based on scientific experience has been developed for the current development phase of marine assessment and the technical means are available to use these indicators to assess the quality of the environment. The current state of the Latvian marine waters was assessed on the basis of the period 2005-2009 mainly. Using historical data and trend analysis, the target value of the indicator is obtained and, compared to the average value of this indicator for the assessment period, obtains an assessment of the current state, summarized in Section D-.

BAL-LV-AA- 006: The BAL-LV Principle for Good Environmental Status was based on the qualitative values ​​of Annex I of the Marine Strategy Framework Directive and on the criteria and methodological standards of Commission Decision 2010/477 / EU for assessing good environmental status in marine waters. Based on the qualitative characterization and criteria of good environmental status, related indicators with quantitative values ​​were chosen, which allow to evaluate the border of GES or non-GES and hence the state of marine waters. The C- section of the evaluation report summarizes the indicators used in Latvia for which a methodology based on scientific experience has been developed for the current development phase of marine assessment and the technical means are available to use these indicators to assess the quality of the environment. The current state of the Latvian marine waters was assessed on the basis of the period 2005-2009 mainly. Using historical data and trend analysis, the target value of the indicator is obtained and, compared to the average value of this indicator for the assessment period, obtains an assessment of the current state, summarized in Section D-.

BAL-LV-AA- 006: The BAL-LV Principle for Good Environmental Status was based on the qualitative values ​​of Annex I of the Marine Strategy Framework Directive and on the criteria and methodological standards of Commission Decision 2010/477 / EU for assessing good environmental status in marine waters. Based on the qualitative characterization and criteria of good environmental status, related indicators with quantitative values ​​were chosen, which allow to evaluate the border of GES or non-GES and hence the state of marine waters. The C- section of the evaluation report summarizes the indicators used in Latvia for which a methodology based on scientific experience has been developed for the current development phase of marine assessment and the technical means are available to use these indicators to assess the quality of the environment. The current state of the Latvian marine waters was assessed on the basis of the period 2005-2009 mainly. Using historical data and trend analysis, the target value of the indicator is obtained and, compared to the average value of this indicator for the assessment period, obtains an assessment of the current state, summarized in Section D-.

BAL-LV-AA- 006: The BAL-LV Principle for Good Environmental Status was based on the qualitative values ​​of Annex I of the Marine Strategy Framework Directive and on the criteria and methodological standards of Commission Decision 2010/477 / EU for assessing good environmental status in marine waters. Based on the qualitative characterization and criteria of good environmental status, related indicators with quantitative values ​​were chosen, which allow to evaluate the border of GES or non-GES and hence the state of marine waters. The C- section of the evaluation report summarizes the indicators used in Latvia for which a methodology based on scientific experience has been developed for the current development phase of marine assessment and the technical means are available to use these indicators to assess the quality of the environment. The current state of the Latvian marine waters was assessed on the basis of the period 2005-2009 mainly. Using historical data and trend analysis, the target value of the indicator is obtained and, compared to the average value of this indicator for the assessment period, obtains an assessment of the current state, summarized in Section D-.

BAL-LV-AA- 006: The BAL-LV Principle for Good Environmental Status was based on the qualitative values ​​of Annex I of the Marine Strategy Framework Directive and on the criteria and methodological standards of Commission Decision 2010/477 / EU for assessing good environmental status in marine waters. Based on the qualitative characterization and criteria of good environmental status, related indicators with quantitative values ​​were chosen, which allow to evaluate the border of GES or non-GES and hence the state of marine waters. The C- section of the evaluation report summarizes the indicators used in Latvia for which a methodology based on scientific experience has been developed for the current development phase of marine assessment and the technical means are available to use these indicators to assess the quality of the environment. The current state of the Latvian marine waters was assessed on the basis of the period 2005-2009 mainly. Using historical data and trend analysis, the target value of the indicator is obtained and, compared to the average value of this indicator for the assessment period, obtains an assessment of the current state, summarized in Section D-.

The BQI index is based on the composition of benthic fauna species (proportion of sensitive and tolerant species), the number of species and the number of individuals in a given species, thus achieving GES when the diversity and abundance of benthic invertebrates is beyond levels associated with contaminated conditions.

GES is achieved when the phytoplankton biomass is outside the levels associated with contaminated conditions.

The BQI index is based on the composition of benthic fauna species (proportion of sensitive and tolerant species), the number of species and the number of individuals in a given species, thus achieving GES when the diversity and abundance of benthic invertebrates is beyond levels associated with contaminated conditions.

GES is achieved when nutrient concentrations in the aquifer correspond to physiographic, geographic and climatic conditions specific to the site and changes in these nutrient concentrations do not result in an adverse direct or indirect increase in nutrients

GES is achieved when nutrient concentrations in the aquifer correspond to physiographic, geographic and climatic conditions specific to the site and changes in these nutrient concentrations do not result in an adverse direct or indirect increase in nutrients

The GES level will be reached if the chlorophyll concentrations correspond to the GES water transparency levels.

GES tiek sasniegts, ja ūdens caurspīdība atbilst dabiskajiem aļģu ziedēšanas un augšanas apstākļiem un šo apstākļu izmaiņas nerada nelabvēlīgu ūdens caurspīdības samazināšanos.

BQI value

mg m-3

BQI value

μmol/l

μmol/l

μg/l

m

GES novērtēšanas metodoloģija un robežlielumi ir izstrādāti Ūdens Struktūrdirektīvas vajadzībām. GES novērtēšanas metodoloģija BQI indikatoram var tikt piemērota Latvijas piekrastes un pārejas ūdens tipu mīkstajās gruntīs. Tomēr, jāņem vērā, ka tā kā paraugi tiek ņemti pavasara beigās un attiecīgajā gadā fiksēto stuāciju lielā mērā ir ietekmējušas iepriekšējā gada slodzes (Aigars et al 2008), tad BQI vāji korelē ar biogēnu vielu slodzēm paraugu ņemšanas gadā. Tāpēc kvalitātes klašu robežvērtības ir noteiktas balstoties uz bezmugurkaulnieku jūtīguma grupu izmaiņām.

Balstoties uz metodiku, ko piedāvā Aigars et al. (2008), kvalitātes klašu robežas vasaras fitoplanktona indikatoram tika atvasinātas no ūdens caurspīdības klasēm. Rīgas līča centrālajai daļai un tās pārejas ūdeņiem tika izmantotas regresijas attiecības starp ūdens caurspīdību (Seki dziļums) un fitoplanktona biomasu vasaras periodā (jūnijs līdz septembris). Tomēr pieejamo datu apjoms nav pietiekams, lai izdalītu fitoplanktona biomasas kvalitātes klašu robežas Rīgas līča piekrastes ūdeņiem. Tādēļ tās tika atvasinātas kā vidējais svērtais no robežvērtībām Rīgas līča centrālajā daļā (attiecība 1/3) un Rīgas līča pārejas ūdeņiem (attiecība 2/3) Attiecībā uz minētā indikatora GES vērtībām atklātās Baltijas jūras daļā, tika izmantoti dati no HELCOM Core indikatoru novērtējuma un attiecas uz Baltijas jūras teritoriālajiem un ekonomiskās zonas ūdeņiem.

GES novērtēšanas metodoloģija un robežlielumi ir izstrādāti Ūdens Struktūrdirektīvas vajadzībām. GES novērtēšanas metodoloģija BQI indikatoram var tikt piemērota Latvijas piekrastes un pārejas ūdens tipu mīkstajās gruntīs. Tomēr, jāņem vērā, ka tā kā paraugi tiek ņemti pavasara beigās un attiecīgajā gadā fiksēto stuāciju lielā mērā ir ietekmējušas iepriekšējā gada slodzes (Aigars et al 2008), tad BQI vāji korelē ar biogēnu vielu slodzēm paraugu ņemšanas gadā. Tāpēc kvalitātes klašu robežvērtības ir noteiktas balstoties uz bezmugurkaulnieku jūtīguma grupu izmaiņām.

Metode GES novērtēšanai ziemas biogēniem balstās uz vēsturisko datu analīzi par barības vielu koncentrācijām ūdens kolonnā. Daudzgadīgās barības vielu koncentrācijas korelē ar vasaras hlorofila a koncentrācijām. Kvalitātes klašu robežas tika atvasinātas pēc reaģēšanas līknes, kas reprezentē korelāciju starp hlorofila a mainību un ziemas DIN koncentrāciju 0-10 m ūdems slānī.

Metode GES novērtēšanai ziemas biogēniem balstās uz vēsturisko datu analīzi par barības vielu koncentrācijām ūdens kolonnā. Daudzgadīgās barības vielu koncentrācijas korelē ar vasaras hlorofila a koncentrācijām. Kvalitātes klašu robežas tika atvasinātas pēc reaģēšanas līknes, kas reprezentē korelāciju starp hlorofila a mainību un ziemas DIN koncentrāciju 0-10 m ūdems slānī.

Vasaras hlorofila a koncentrāciju, kas reprezentē GES skaitlisko vērtību atvasina no vasaras Seki vērtībām.

Par pamatu GES skaitliskās vērtības noteikšanai tika izmantota ekosistēmas izmaiņu koncepcija (ICES. 2007. Report of the ICES/HELCOM Working Group on Integrated Assessments of the Baltic Sea (WGIAB), 12-16 March 2007, Hamburg, Germany. ICES CM 2007/BCC: 04.71 pp.), saskaņā ar kuru ekosistēma ārējā spiediena rezultātā pāriet no viena stāvokļa citā. Analizējot Seki vēsturiskos datus saskaņā ar šo koncepciju, var konstatēt, ka Seki dziļums Rīgas līcī būtiski samazinājās laika periodā no apmēram 1982.gada līdz apmēram 1990.gadam (XX Attēls). Šis pārejas periods labi saskan ar Integrētās Novērtēšanas metodi iegūto pārejas no viena ekosistēmas stāvokļa uz citu periodu. Pārejas perioda vidējā Seki dziļuma vērtība (4 m) tika noteikta par GES.

Full operational programme (in 2012)

Full operational programme (in 2012)

Full operational programme (in 2012)

Full operational programme (in 2012)

Full operational programme (in 2012)

Full operational programme (in 2012)

Full operational programme (in 2012)