Re: Sevan
YEGHVARD RESERVOIR in short description:
While most reservoirs are built by closing a valley by a dam, Yeghvard is a very original idea, born from several needs:
1- To stock water in winter and spring, to spare Sevan (Similar in this to other reservoirs of the Ararat valley: Aparan, Akhurian, Marmarik, Azat...).
2- To take some advantage of the Sevjur river. As a matter of fact, this is a unique river in RA territory, wich has steady stream, due to the fact that it is fed by underground/artesian sources of the Ararat bassin. That gives it the third largest debit after Akhuryan and Hraztan in the basin, but with small use. As a matter of fact the total lengt is some 40 Km only, in lowland Armavir region. It comes out near Metzamor (and is used to cool the stations turbines, one of the reasons the site was chosen, ignoring proximity withe Yerevan and the border...), and feeds the irrigation system of the region, then ends in the Arax. So most of the water goes to the Azaris...
3- Even if filled to its maximum, the Aparan reservoir was unable to catch all the spring water of the Kasakh river (melt of Arakadz), so a good chunk was lost during spring snow melting period.
4- The Hraztan river, wile generating from Sevan lake (an thus dried during winter if we decide so), drains nevertheless a lot of smaller affluents (one being Marmarik), and thus, no matter what we do, some water is wasted in same spring period.
5- To create a major water reservoir/recreation lake near Yerevan (only 15 Km, 1300 m hight), permitting tourism on a much longer period than the 2 months available on Sevan shores (1900 m), for the Yervan aglomeration. The small Yerevan lake was of no use, given its size, pollution, and situation in the middle of the city, after its mushroom growth.
Wile the objective needs were there, the problem was to find a place you could flood, given the high density of population in the Hraztan gorge (Arzni, Tcharentzavan, Apovian, Nor Hadjen, Hraztan....), and anyway, lack of capacity of the futur reservoir to meet the objectives.
Finally, the original choice of Yeghvard was made:
The minuses were:
- No natural stream, so you needed to bring in the water by the irrigation system already used to irrigate the Yeghavard district: while this was not that hard regarding Hraztan and Kasakh rivers (natural gravity), it supposed use of electric power, to pump the water of Sevjur from its lowland position to 1350 m...
- Yeghvard plain is a 'depression' situated between the streams of Hraztan and Kasakh rivers, and is by a matter of fact a very fertile land, easy to irrigate.
- You needed not one, but two platinas:dams to close the 2 ends of the plain, and protect 2 major aglomerations:
Yeghvard and Nor Yerznka. You can see the 2 dams already well on this image:
Plus, the huge platina on yeghvard side is original, due to its angle....
Nevertheless, the decision was made, and most of the costly investment was already done during soviet period.
Most of the earthwork was done, plus, as planned, some of the rich soil was excavated and then transported by tractors/Gamaz trucks from the bed of the futur reservoir, to the sides of the road Yerevan /Ashtarak (actual location of Broshyan apple orchards, fertile fields wasted by our generation to mushroom 'Vahagni' and similar real state projects). This part of the project was a luxury only soviets could have afforded while having no economic limits....., and that we wasted: so when you see the remaining orchards of apple each time you pass on this road, think of it....
So, today, we have all the necessities still in place.
We have this project 80-90% already financed (still in need of care, since if not preserved, could be endangered as the case of Marmarik, plus needs to forbid any investment/construction in the would be lake bed).
We need political will to end the project, and find a solution or a budget for the pumps, to take in the water of Sevjur.
PS: There was still 2 last parts of this big Sevan saving projects:
1- The Tzoraket reservoir (more or less need to deviate water by tunnels): now totally abandoned do to lack of need of the water for Sevan, and 'privatisation' of the reservoir/hydro project to oligarkhs (already talked about).
2- An other artificial lake similar to Yeghvard, to stock Akhuryan water in the ex-Baghramyan districts useless lava fields, north of the Baghramyan army training center, between Lusakn, Karakert and Ashnak villages, but with only one platina, and no need for earth saving.... while exploiting thousands of acres unusable lands... unfortunately, a very small part of the project was already done, the platina never started, when 1988 came... so this will remain a fantazia never to be accomplished, since a similar project would worth billions today.
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Re: Main task of the decade: Yeghvard reservoir
Unfortunately, theis MGM/Kirk Kirkoryan project seems to be a fantasia....
If materialised, no matter casino, etc... bad sides, it would have solved a strategic problem for the country.
Last edited by Vrej1915; 06-03-2012, 03:18 PM.Leave a comment:
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Re: Sevan
Last edited by Vrej1915; 06-03-2012, 11:51 AM.Leave a comment:
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Main task of the decade: Yeghvard reservoir
Construction of Yeghvard’s Water Reservoir Needs Sponsors
YEREVAN (Armenpress)–The project for the construction of Yeghvard’s water reservoir has been reviewed by ArmWaterDesign Institute at the request of Armenia’s Agriculture Ministry. This water reservoir–if built–will significantly reduce the volume of water pumped out from Lake Sevan for irrigation purposes.
According to the original project–the reservoir capacity should have been 228 mln cubic meters–of which 90 mln cm of water must have been accumulated from the Hrazdan and Kasakh rivers–while the rest should have been raised by means of pump stations set on the river Sevjur.
According to the deputy head of the institute Yuri Javadian–the project was discussed at the technical council and a decision on establishing a water reservoir with a capacity of 90 mln cubic meters was made. This water reservoir will give the opportunity of reducing the water pumped out from Sevan by 41.5 mln cm.
As Javadian said–according to the technical-economic calculations–about $70 million be required for the construction of the water reservoir. The plan has already been presented to the Foreign Affairs Ministry–which has sent it to foreign countries for sponsors.
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Re: Sevan
In all these bad news, one very good news.
Long awaited, Marmarik reservoir was commissioned:
This will take some pressure off Sevan.
The dam was built in Soviet times, but with very poor quality.
It failed during filling of water, and a major catastrophe was miraculously avoided (Apovian, Getchariss are under the dam).
Finally a WB loan permitted refurbishing of the dam.
No major hydro power from this, but spares water from Sevan.
Remains one major dam to be completed.
The major, the big one: Yeghvard dam.....
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photos:
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Comprehensive impact study of the Marmarik reservoir:
Last edited by Vrej1915; 06-03-2012, 02:53 PM.Leave a comment:
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Re: Sevan
Another bad news yet for Sevan.
As if the poisoning from Sotk (Gold) and Chorja (Chrome) mines, with illegal factories built in total impunity was not enough, now the water coming from Arpa will be poisoned due to open pit mining on Amulsar (the montain dominating Ketchud and Spantaryan reservoirs, both providing water to the tunnel Vorotan-Arpa Sevan).
To remind: state revenues from mining are minimal, due to fraud, and lack of final refining (Armenia exports 'concentrate', that is all the pollution is for us, end product in Germany, but since we exported 'concentrate', often >95% enriched, it is not taxed as gold, silver, molybden or copper...)
If the state could impose close pit (tunnels) in place of open pits, the damage would be less, but oligarkhs will have less bonanza money....
It never happens now days.
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ԷկոԼուր
Մայիսի 31-ին «Ջերմուկի զարգացման կենտրոն» հասարակական կազմակերպությունը կազմակերպեց քննարկում այն մասին, թե ինչպես Ամուլսարի ոսկու հանքավայրի բաց եղանակով շահագործման նախագիծը կազդի ջրային ռեսուրսների վրա: Քննարկմանը մասնակցեցին «Գեոթիմ» ընկերությունը, որն իրականացնում է նախագիծը, անկախ փորձագետներ, հասարակական կազմակերպություններ:
Նախքան քննարկման մասին նյութերը հրապարակելը, «ԷկոԼուր»-ը ներկայացնում է «Ամուլսարի ջրային ավազանը» տեսահոլովակը: Ապրիլի կեսերին «ԷկոԼուր»-ը եղավ Ամուլսարի` Որոտան եւ Արփա գետերի ջրահավաք ավազանում: Տեսանյութում պարզ երեւում է, թե ինչպես է ողջ Ամուլսարը պատված առվակներով, որոնք առաջացել են ձնհալից: Առվակները հոսում են ներքեւ , թափվում մակերեսային ջրերի մեջ, եւ վերջնական արդյունքում ջուրը հայտնվում է երկու խոշոր ջրամբարներում` Սպանդարյանում եւ Կեչուտում: Ամբողջ ավազանը փոխկապակցված է բնական եւ արհեստական ջրհոսքերով:
Մեր կարծիքն է, որ ողջ ջրավազանի համար առկա են թափոններով աղտոտման ռիսկեր: Այդ ռիսկերը պետք է պարտադիր կերպով արտացոլված լինեն փորձաքննության եզրակացության համար ներկայացված նախագծում:
Last edited by Vrej1915; 06-02-2012, 11:26 PM.Leave a comment:
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Re: Sevan
yeah, i see now. nvmOriginally posted by Vrej1915 View Post
Perhaps I may suggest you read again??
I thought you were talking about military tanks...
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Re: Sevan
well, what choice do we have? it's not like you can run tanks on electrical batteries.. or CAN U ?Originally posted by Vrej1915 View Post
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