Comenius Omerli Baraj Presentation

COMENIUS

ÖMERLİ BARAJI

ÖMERLİ BARAJI

Ömerli Barajı is found in Beykoz, İstanbul. It is connected to the river called Riva Deresi. The purpose of the dam is to store water for daily usage and for drinking. The volume of the dam is 1 650 000 cubic meters. The depth of the dam is 53 meters.

PURPOSES OF DOING THIS PROJECT

• To investigate the properties of the water of Ömerli Barajı

• To learn how many different species are living in the lake and the characteristic properties of these species

• To reveal the differences and the similarities between the ecosystem of Ömerli Barajı and a typical freshwater ecosystem

• To learn whether the water of Ömerli Barajı should be available as drinking water or not.

PROCESS

We took two water samples from Ömerli Barajı as we were doing our project. Immediately, we measured the amount of dissolved oxygen in the water samples. Then we examined the water samples under a microscope. We had a problem when we were doing our project. When we first took the water samples, we couldn’t find much living organisms in the water. Because of this we waited for about a week for them to breed and the population to become large enough to see.

SPECIES LIVING IN ÖMERLİ BARAJI

Arthropoda

Nematoda

Rotifer


Diatoms


Desmid

Rotifer


Green Algae

BIOLOGICAL ASPECT

We found diatoms in the water of Ömerli Barajı. This shows that the water is clean because diatoms live in clean water.We found that there are no coliform bacteria in the water of Ömerli Barajı. This shows that the water of Ömerli Barajı is clean because coliform bacteria are the indicators of pollution. They are found in human faeces.Having organisms living inside the water of Ömerli Barajı indicates that there are enough nutrients in water to support life.We saw photosynthehic organisms, worms and small animals in water. This shows that the water of Ömerli Barajı must not be available as drinking water before removing the organisms from the water.

CHEMICAL ANALYSIS

ÖMERLİ SAMPLE ONE SAMPLE TWO

Nitrate (ppm) 0<x<1 0

Sulfide (ppm) 0 0

Ca hardness (ppm) 150 110

Total hardness (ppm) 33 26

Dissolved oxygen (ppm) 10 10

Coliform Purple (-) Purple (-)

CHEMICAL ASPECTIn our test results; Nitrate (NO-3) was found to be “0”. The actual level may be greater than zero because high levels of Chloride (Cl-) will cause this method to give low results even though the level of NO-3 high.There was no color change for Sulfide (S-2) test showing that the levels in our samples are “0” but the actual level might be greater than zero because high Sulfide (S-2) concentrations can prevent color development.Calcium (Ca+2) hardness in our first sample is 150 ppm so our first sample can be classified as “hard”. Calcium (Ca+2) hardness in our second sample is 110 ppm so our second sample can be classified as “moderately hard”.Total hardness of the first sample is 33 ppm and the second one is 26 ppm. These show that our samples can be classified as “soft”.The result for dissolved Oxygen (O2) is 10 ppm for both of our samples. Fish growth and activity usually require 5-6 ppm of dissolved O2 so the result of 10 ppm shows that our samples can be appropriate for living things.

DIFFERENCES AND SIMILARITIES BETWEEN THE ECOSYSTEM OF ÖMERLİ BARAJI AND A TYPICAL

FRESHWATER ECOSYSTEM

A typical freshwater ecosystem

Living organisms: insect larvae, rotifers, crustaceans, ciliates, desmids, bacteria, ameobas, diatoms, worms, protozoa, fish, plant

Ecosystem of Ömerli Barajı

Living organisms: fish, plant, arthropoda, nematoda, diatoms, desmids, protista, rotifer, green algae, worm, ciliates, bacteria

DIFFERENCES AND SIMILARITIES BETWEEN THE ECOSYSTEM OF ÖMERLİ BARAJI AND A TYPICAL

FRESHWATER ECOSYSTEM

TYPICAL FRESHWATER E.

Nitrate (ppm) <10-20

Sulfide 0

Ca hardness (ppm) More than 100

Total hardness (ppm) Less than 50

Dissolved oxygen (ppm) More than 4-5

Coliform depends

ÖMERLİSAMPLE

ONESAMPLE

TWO


Sulfide (ppm) 0 0





NOT SAFE TO DRINK

SAFE TO DRINK

Nitrate (ppm) 15-25 0-10

Sulfide (ppm) More than 0 0

Ca hardness (ppm)

More than 200

Less than 200

Total hardness (ppm)

More than 500 Up to 500

Dissolved oxygen (ppm) More than 3 Less than 3

Coliform

(+)

(+)

SHOULD THE WATER OF ÖMERLİ BARAJI BE AVAILABLE AS DRINKING WATER?

ÖMERLİSAMPLE

ONESAMPLE

TWO


Sulfide (ppm) 0 0





CONCLUSION

As we were doing our project, we achieved our goals. We learned the different kinds of species living in Ömerli Barajı and the properties of these species. After making a search, we learned the differences between a typical freshwater ecosystem and the ecosystem of Ömerli Barajı in the means of Biology and Chemistry. Also we found that the chemical values of the water of Ömerli Barajı should be fixed and the living organisms should be removed from the water before using it as drinking water.

PREPARED BY

NESLİ DÖLÇEN

IRAZ CANDAŞ

KOÇ ÖZEL LİSESİ

Comenius Omerli Baraj Presentation

Technology

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