In the frames of "Supporting New Reforms in SHPP Sector through CSO-Government Dialogue" project, the expert group visited "KEnergy" SHPP, which is located in the administrative area of Ditavan Community, Tavush Region, Armenia. The SHPP is constructed on the transboundary Aghstev River, the length of which is 133 km, while its length in Armenia is 99 km. "KEnergy" SHPP is operated by "Qarevard" LLC. As a result of the monitoring, the expert group found out:
• "KEnergy" SHPP has been developed since 2016.
• The SHPP hasn't undergone environmental impact assessment, as RA Law 'On Environmental Impact Assessment and Expertise' says that SHPPs with up to 1 MW capacity are not subject to environmental impact assessment.
• According to the water usage permit, SHPP water intake coordinates are Х=45011'45'', Y=40059'27'', according to the water usage permit and Public Service Regulatory Committee, the mark of the upper canal pound is H=530m (PSRC certificate dated on 1 April 2017). Water discharge coordinates are Х=45012'12'', Y=40059'34'' the mark of the lower canal pound is H=517m; according to the water usage permit and the Public Service Regulatory Committee.
• According to the company and PSRC, the estimated pressure of the SHPP is 11.8m, the estimated yield used by the SHPP is 10 m3/s, but the company says it actually uses 7.0 cum/s. According to the PSRC certificate, the projected capacity is 976 kW, but according to the company, its factual capacity is 600 kW. Because of SHPP aggregates and low pressure, the SHPP doesn't operate with its entire yield. At the moment of observation, it ensured 286 kW projected capacity with around 3 cum/s estimated yield. According to the PSRC certificate issued on 1 April 2017, the factual useful delivery of the electricity is 5.442 million kWh. According to 'Computation Center' CJSC data, "KEnergy" SHPP operated in July-December in 2016 producing 779445 kWh electricity.
• Duration of SHPP license - 31.08.2016- 24.12.2032, water usage permit – till 2032.
• There is a concrete overfall dam in the head section. The relevant acclivity of the dam was not ensured to have free-of-obstacle environmental flow. After closing the valves, the amount of the environmental flow drastically reduced.
• There is a stair-like (cascade) concrete fish passway in the SHPP head section 30.50 m long, 1.50-1.90m m wide. There are 12 stairs, each of which forms a small pond nearly 50 cm high and wide, where the height of water column makes up 30-40 cm.
• The lower stair of the fish passway is blocked with stones and flows of tide, which is an obstacle for the movement of the fish. The distance between the river surface and the first stair of the fish passway is 50-60 cm, which creates additional difficulties for the movement of small fish species in the river. In general, the fish passway in the head section could have ensured natural movement of the fish living in the river, if the first stair was equal to the river surface.
• There is garbage-collecting net 9.10 cm long, and the distance between its bars is 3 cm, while such distance between the bars can’t prevent the entrance of 15-centimeter-long fish in the pipeline.
• In the section of the river, where the SHPP head section is constructed, the following fish species were recorded based on the studies carried out in 2016-2017:
1. Brown Trout (Salmo trutta fario) (met accidentally)
2. The South Caspian sprilin (Alburnoides eichwaldii)
3. Kura barbell (Barbus cyri)
4. Mursa (Luciobarbus mursa)
5. The Kura loach (Oxynօemacheilus brandtii)
6. North Caucasian bleak (Alburnus hohenackeri)
7. The Kura bleak (Alburnus filippii)
8. The squalius (Squalius orientalis)
9. The Golden loaches (Sabanejewia aurata) (red-listed in Armenia)
11. The Prussian carp (Carassius gibelio) (climate-accustomed)
12. The stone moroko (Pseudorasbora parva) (climate-accustomed)
13. The common carp (Cyprinus carpio) (flowing from fish farms)
14. The Kamchatkan rainbow trout (Parasalmo mykiss).
• The length of SHPP metallic pipeline is 865m, according to the PSRC and 800 m according to the company, while its diameter is 2600mm, according to the PSRC and 2500mm, according to the company. Reclaiming hasn’t been carried out.
• The following SHPPs are constructed on the Agstev River: 'Agshtev1' SHPP (length of derivation pipeline, according to the project – 5428 meters), 'KEnergy SHPP'(length of derivation pipeline, according to the PSRC – 865 meters), 'Kok' SHPP (length of derivation pipeline, according to the PSRC – 1150 meters). The aggregate length of all SHPP derivation constructed on the river makes up 7.51% as compared with the river length.
• According to the water usage permit, " KEnergy SHPP" SHPP can carry out water intake within 12 months from river ensuring the environmental flow of 1.19 cum/s. At the moment of observation, no environmental flow was ensured.
• At the moment of observation, the environmental flow was let out with a dam and a fish passway. The yield flowing over the dam was regulated through the valves. Only one out of two aggregates was operating. In case of the operation of the second aggregate, ensuring the environmental flow was undermined.
• There is no water-meter for the calculation of the environmental flow.
• The generator is a synchronous one.
• SHPP equipment ensure half-automated management.
• There is no automated management of water level.
• The transformer substation is missing, the junction is executed to the network itself.
• The are near 'KEnergy' SHPP is partially greened, there is no tree felling.
• There was garbage collected in the exit part of the SHPP water intake section, while waste water was discharged into the river.
• No inspections have been carried out at SHPP.
• According to the company, the SHPP doesn't generate problems with the irrigation.
• The reconstruction of the fish passway is needed for the purpose of ensuring the natural movement of all fish species of different sizes (particularly that of small fish species) and constant environmental flow to ensure relevant slope, as well as it is necessary to construct another stair at the beginning of the fish passway near the river surface.
• To equip water-intake section with automated management, online supervision systems, and water-measuring devices, which will enable to regulate and control the water amount used by the SHPP and the amount of the set environmental flow
• To re-equip the SHPP with technically highly effective aggregates to ensure its projected capacity, which will have an entirely automated management system and will operate with less water amount.
• To regularly carry out the collection and removal of garbage accumulated in the water intake section in the areas beyond water-covered areas and organize its transfer to the landfill site.
• To carry out the discharge of the wastewater through a water-proof well or a 'mini' cleaning station.
According to RA Law 'On Environmental Impact Assessment and Expertise', which says that SHPPs with up to 1 MW capacity are not subject to environmental impact assessment, 'KEnergy' SHPP hasn't undergone environmental impact expert assessment, nevertheless, the construction and operation of 'KEnergy' SHPP has a significant impact on the environment with its enormous water intake section constructed along the entire width of the river and taking 10.0 cum/s water from the river. It's proposed to envisage a clause in the provisions of the law, according to which all the HPPs to be constructed on the river beginning 0 MW projected capacity will be subject to expertise.
The material was developed in the frames of “Supporting new reforms in SHPP sector through CSO-government dialogue” supported by UNDP/GEF Small Grants Programme".
13:37 August 02, 2017