In the framework of the project entitled “Support to SHPP-relating Reforms Through the Dialogue of Public and RA Nature Protection Ministry for Sustainable Use of River Ecosystems” the expert group visited “Khachaghbyur HPP 1” SHPP. “Khachaghbyur HPP 1” SHPP is located in Tavush Region, in the administrative area of Getahovit Community. The SHPP is constructed on the Paghjur River (length – 31 km). It’s operated by “Qarevard” LLC.
As a result of the monitoring, the expert group found out:
· The SHPP has been operating since 2009.
· According to the project, the static pressure of the SHPP is 119 m and the company says it’s 122m. According to the certificate issued by the Public Services Regulatory Committee on 1 January 2016 and the project, the estimated pressure of the SHPP is 107.7 m. According to the project and PSRC certificate, the estimated yield used by the SHPP is 2 m3/s. According to the PSRC certificate and the project, the projected capacity is 1640 kW. According to the PSRC, as of 01.10.2015 the factual useful delivery of the electricity is 5.178346 million kWh. The estimated production of the SHPP is 7.253 million kWh according to the project, duration of license - 30.09.2009-30.09.2024, water usage permit - 20.06.2014- 20.06.2017.
· The water intake and discharge coordinates in the water usage permit comply with the real coordinates.
· “Khachaghbyur HPP 1” SHPP carries out water intake around 400 meterd down the water discharge point of “Khacaghbyur 2” SHPP.
· “Khachaghbyur HPP 1” SHPP water intake point includes catchment basin, concrete dam, sand trap, stair-like fish passway, which is combined with the dam.
· The length of the dam of the SHPP is 5 m, its height is 2 m.
· The worn-out concrete stair-like fish passway has around 23.0 m length, height of 1.2 m near the entrance and width of 0.9 m. The lower part of the fish passway finished on the concrete dam and is higher by 50-60 cm than the riverbed, which is an additional obstacle for the migration of the fish in the river. Only mature brown trout can overcome such height, nevertheless, the large length of the fish passway and difficult stairs make additional difficulties even for these fish species. The dam near the fish passway is easier to overcome for the brown trout than the fish passway itself.
· 2-3 years ago an assignment was issued to reconstruct the fish passway, which hasn’t been performed.
· There is a garbage-collecting cage net of 3 m long, and the distance between its bars is 2.5-3 cm. Such distance between the bars can’t be an obstacle for the small fish 8 cm long to appear in the pressure pipeline.
· In the section of the Paghjur River, where the SHPP section head is constructed, you can meet the brown trout, the Kura barbell etc. The South Caucasus Sprilin and Kura loach may flow up here. There are fish farms on the river banks, from where the rainbow trout may flow in.
· The water is taken to the station through two pipelines of 1800 m length and 0.8 m diameter, which are completely over the surface: it’s a deviation from the project.
· Percentage correlation of aggregate length of SHPP derivation pipelines (6630 meters) of “Khachaghbyur HPP 1” SHPP (the length of the derivation pipeline is 1800 meters, according to the project), “Khachaghbyur” SHPP (according to the project, it’s length is 1430m), “Khachaghbyur 2” SHPP (the length of the derivation pipeline is 3400meters, according to the project), with the length of Paghjur River (31 km) makes up 21.38 %.
· According to the water usage permit, “Khachaghbyur HPP 1” SHPP can take 63449.6 cum/s water ensuring 0.05 cum/s environmental flow in the river. The project sets the same environmental flow. At the moment of observation, the environmental flow was ensured with a dam and a sand trap in the form of extra yields and a fish passway. Sufficient amount of water was discharged to the river through the fish passway.
· According to “Computation Center” CJSC data, in 2014 “Khachaghbyur HPP-1” SHPP operated for 12 months in 2014 and produced 3811955 kW electricity.
· There are three hydroaggregates of local production installed in the SHPP building. At the moment of observation, only one was operating, which ensured 270 kW projected capacity with 400 l/s water amount. The SHPP ensured the maximum yield of 1700 kW in high-water season (April, May and June).
· The transformer substation is fenced, the installed transformers are not equipped with oil-collecting system.
· Automatic management and recording of water intake and environmental flow is not ensured.
· There is entirely automated management system in the station.
· There is no water-meter sealed by a relevant environmental body in the water intake.
· The site development works of the station area have been carried out in line with the requirements posed to SHPPs. The area is greened with newly planted trees, fenced and laid with concrete tiles.
· The requirements posed to the preservation and use of fertile soil haven’t been carried out.
· Reclaiming hasn’t been carried out.
· There are no signs of landslides and landscape violation.
· The discharge of household wastewater is carried out through a water-proof well.
· In 2014 the State Environmental Inspection imposed an administrative fine of 200,000 AD on the SHPP and compensation of damages to environment in the amount of 100,000 AMD.
· The SHPP infrastructures are close to “Arjatkhleni” and “Ijevan” state reserves.
In low-water season the SHPP factually deprived the river of the water. All the SHPPs constructed on rivers with such water regime, all the SHPPs must be operated only in high-water season. All the aggregates installed in the station can’t ensure optimal use of water reserves.
· To ensure automatic management of environmental flow in the head section, installation of water-measuring devices and online control.
· To reconstruct the fish passway.
· To remove the dam blocking the riverbed.
· To re-equip the SHPP with new and up-to-date hydroaggregates having high efficiency to have entirely automated management system, to operate with little water amount and to ensure the projected capacity.
· To review the hydroeconoic estimates with a tendency to increase environmental flow.
· To equip the transformers with oil-collecting system.
The material was developed in the frames of “Supporting reforms in the sector of small hydro power plants through enabling a dialogue between civil society and the Ministry of Nature Protection for sustainable use of river ecosystems” supported by UNDP/GEF Small Grants Programme".
17:24 April 13, 2016