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Water Resources Management in the region of Orestiada

Water Resources Management in the region of Orestiada. Quality of Surface Water. Mavrogenidis Stylianos Katrantzis Konstantinos Kakos Stelios. r. Evros. r. Ardas. r. Erithropotamos. The region of Orestiada. r. Ardas. r. Ardas. r. Ardas. Chemical Analyses.

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Water Resources Management in the region of Orestiada

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  1. Water Resources Management in the region of Orestiada Quality of Surface Water Mavrogenidis Stylianos Katrantzis Konstantinos Kakos Stelios

  2. r. Evros r. Ardas r. Erithropotamos The region of Orestiada

  3. r. Ardas

  4. r. Ardas

  5. r. Ardas

  6. Chemical Analyses Chemical analyses are conducted by the Institute of Geological Researches as concerned the physical – chemical parameters, the ions and some elements in very small quantities. Samples are taken from the rivers Evros and Ardas.

  7. Places of Sampling

  8. Places of Sampling PE1 PE2 PA1 PA2 PA3 PE3 PA4 PA5

  9. Physical – Chemical Parameters

  10. Ions

  11. Elements in small quantities

  12. SAR and Alkaline Index Sodium Adsorption Relation (SAR) and Alkaline Index (% Na) indicate the suitability of water for irrigation. SAR<6 or Alkaline Index<20 means that the quality of water for irrigation is excellent.

  13. SAR and Alkaline Index

  14. Water Distribution • 53 % of water for irrigation comes from surface water • 47 % of water for irrigation comes from water drills

  15. Waste Water Treatment There is a unit of waste water treatment in Orestiada that accepts 3.000 m3/day of waste water. Having been treated, they are discharged in a canal which finally ends in r. Evros.

  16. Waste Water Parameters

  17. Conclusions • The water of r. Evros in contrast with this of r. Ardas is overloaded with SO4-2 as it comes into Greece. This may happen because Bulgarian plants throw their waste in r. Evros. Afterwards, the concentration of SO4-2 is getting lower because of its mixing with r. Ardas, r. Erithropotamos and Turkish r. Tountzas.

  18. Conclusions • SAR is lower than 6 in all the samples and Alkaline Index varies between 20 and 40. This means that the quality of surface water in the region of Orestiada is very good and the water is suitable for irrigation.

  19. Conclusions • Repeated chemical analyses are necessary because there are suspicions that Bulgarian plants pollute r. Evros with radio – active waste which finally end in Thracian Sea (North Aegean Sea). • The values of parameters for the treated waste water show that their discharge in the r. Evros does not create any problem.

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