Research on Seepage Control of Jurong Pumped Storage Hydroelectric Power Station

Based on the geological and hydrogeological conditions of the Jurong Pumped Storage Hydroelectric Power Station (JPSHP), a 3D groundwater flow model was developed in the power station area, which took into account the heterogeneity and anisotropy of fractured rocks. A control inversion method for fractured rock structural planes was proposed, where larger-scale fractures were used as water-conducting media and the relatively intact rock matrix was used as water-storage media. A statistical method was used to obtain the geometric parameter values of the structural planes, so as to obtain the hydraulic conductivity tensor of the fractured rocks. Combining the impermeable drainage systems of the upper storage reservoir, underground powerhouse and lower storage reservoir, the 3D groundwater seepage field in the study area was predicted using the calibrated model. The leakage amounts of the upper storage reservoir, powerhouse and lower storage reservoir were 710.48 m3/d, 969.95 m3/d and 1657.55 m3/d, respectively. The leakage changes of the upper storage reservoir, powerhouse and lower storage reservoir were discussed under the partial and full failure of the anti-seepage system. The research results provide a scientific basis for the seepage control of the power station, and it is recommended to strengthen the seepage control of the upper and lower storage reservoirs and the underground powerhouse to avoid excessive leakage and affect the efficiency of the reservoir operation.

Russian Orthodox Churches in Birlya and Taburnoe Villages of the Ulyanovsk Oblast

The article reflects the results of research on the topic «History and cultural heritage of the settlements of the Ulyanovsk region." The subject of the research is the history of the St. Michael the Archangel's Church and the Kazan-Mother of God church in the villages of Birlya and Taburnoe (now belonging to Melekessky district of the Ulyanovsk region). The purpose of the article is to identify the most important periods of the above-mentioned churches from the end of the 19-th century to the 1950-s, to establish the composition of the clergy, and the educational work of the clergy among the population. Analysis of unpublished documents from the Central State Archives of the Samara Region allowed to establish: the ethnic composition of the settlements, socio-economic status of inhabitants, reasons and patterns of migration of the local population; the foundation and liquidation dates of the churches, facts of life of church ministers and parish; statistical data on the economic structure of the clergy. The Mikhailo-Arkhangelsk and Kazan-Mother of God churches in the villages of Birlya and Taburnoye are lost monuments of the Orthodox cultural heritage. Mikhailo-Arkhangelsk and Kazan-Mother of God churches were built, respectively, at the end of the 19th century. and destroyed in the first half of the 1950-s. in connection with the construction of the Kuibyshev hydroelectric power station, and their location is flooded by a reservoir.

Edaphic invertebrate diversity around the reservoir of a small hydroelectric power station in southern Brazil

To meet the growing demand for electricity, considerable effort has been invested in the construction of hydroelectric stations in Brazil. The environmental impacts caused by these projects have been significant, especially on fauna. To evaluate the biodiversity of edaphic invertebrates, a study was performed in an area surrounding a small hydroelectric station of Flor do Sertão, in the Santa Catarina state, Brazil, covering three distances (5, 15 and 30 meters) from the flooded region of the reservoir. From December 2010 to June 2011, surveys of edaphic invertebrates were performed by pitfall traps. The invertebrates collected at each distance were compared and their diversity was calculated through Hill numbers. The dynamics were analyzed through the Shannon index exponential and the inverse Simpson index, and correlated climatic variables to invertebrate diversity. A total of 14,074 specimens were collected from 24 taxonomic groups (Order). The analyses according to size and sample coverage showed few differences in invertebrate diversity between the distances. Values of richness and diversity of common groups are similar for all distances. There is a trend decrease in diversity dynamics for common individuals, with a strong decline in June. The diversity of edaphic invertebrates exhibited high correlation with temperature and no correlation with pluviosity.

LOCAL STUDIES OF ICE COVER EFFECTS ON DAM GATES

The experience of operation of surface emergency gates in ice-breaking conditions at a number of hydroelectric power plants has shown the insuffi cient eff ectiveness of the methods used to combat freezing of structures. The rules for technical operation of spillway dam gates in winter provide for heating of structures by slots, threshold and skin in conjunction with measures to maintain mines before construction. However, measures to heat gates and build mines are not always suffi ciently justifi ed and justifi ed. In order to obtain full-scale data and scientifi c information for the development of recommendations on operating and accounting modes during design, full-scale studies of stresses and defl ections in the load-bearing elements of the watershed gate of the hydroelectric power station were carried out. This article presents the results of fi eld studies in comparison with calculated values. As a result of the studies, information on the static operation of fl at gates in winter conditions is obtained, which is of theoretical and practical interest. The materials can be used to clarify technical operation rules and to clarify regulatory documents for the design of hydromechanical equipment at hydroelectric power stations.

Technology of welding and repair works of hydropower plants units

In the course of long-term operation of hydroelectric units, they are subject to wear and tear, which negatively affects the power generating capacity of the hydroelectric power station. The existing repair technology provides the restoration of the geometric dimensions of the impeller chamber of the hydraulic unit using an austenitic cladding layer. However, this technology is characterized by the occurrence of cracks and delamination of the deposited layer during post-repair operation, which is negatively reflected in the production cycle of electricity. A new technology and welding consumables have been proposed for repair and restoration works of hydroelectric units at hydroelectric power plants, providing an increase in the quality level, high characteristics of hydroabrasive and cavitation resistance, and increasing of working period of hydroelectric power plants. Inspection of the body of the hydraulic unit was carried out, defects were identified and classified, the reasons for their occurrence were analyzed. The research results make possible to optimize the alloying system of the deposited metal, to determine the optimal welding mode, to reduce the amount of the martensite component and to develop new filler materials and the technology for welding and repair works of hydroelectric power plants.

Assessment of the position of the project water flow in the lower reaches of hydroelectric facilities, using the example of the novosibirsk hydroelectric power station

Construction of large hydroelectric complexes on the plain rivers of Western Siberia, such as the Ob, as well as other types of anthropogenic impact (infill development, quarrying of nonmetallic building materials, carrying out track works, laying communications, wastewater discharges, etc.) lead to a change in water and channel regimes, hydrological characteristics, channel deformation in the downstream. One of these changes is the landing of water level in the section of the lower pond of the Ob from the Novosibirsk hydroelectric complex to the mouth of the Tom River, which adversely affects navigable conditions of this stretch, operation of water intakes, port and sluice, and also damages the fish industry. The landing of the water level continues to this day, and in order to maintain the design water level, it becomes necessary to increase navigation releases. The design level was changed several times after the commissioning of the Novosibirsk hydroelectric complex due to its low availability, a further change in the availability will lead to a change in the design level mark, or rather its lowering. Therefore, the purpose of the study is to assess the position of the design flow rate at the established design level and make a forecast of changes in water flow depending on the time that has passed since the start of operation of the Novosibirsk hydroelectric complex, taking into account the impact on the channel, carried out dredging works, as well as other types of anthropogenic impacts.

Modeling of Flooding of Settlements During the Spring Flood

The problem of flooding of territories with flood waters for settlements of the Volgograd region is considered. A numerical model of flood water dynamics is constructed, taking into account the topography of the terrain. The simulation is based on two-dimensional shallow water equations. For computational experiments, a parallel implementation of the numerical scheme CSPH-TVD for NVIDIA graphics accelerators with CUDA technology is used. The digital model of the river-bed and floodplain relief is based on spatial data SRTM3 and SRTMGL, topographic maps of the area, longitudinal profiles of rivers. The water flow rates for the Buzuluk and Perevozinka rivers are determined and a hydrograph of the Volga hydroelectric power station is constructed for the given probabilities of exceeding the water level. Flood maps were obtained for the following localities: Novoannisky, Berezovka 1st, kh. Vyazovka. The maximum values of the depths for 1 %, 3 %, 5 %, 10 %, 25 % and 50 % of water security are presented. An analysis of the flood situation was carried out and appropriate engineering and protective measures for settlements were proposed. At maximum flood water levels, residential buildings of kh. Berezovka 1-I are not subject to flooding. In order to minimize the negative impact for the city of Novoanninsky, it is proposed to carry out timely clearing of the river-bed of the Perevozinka river from congestion. To protect from flooding ch. Vyazovka it is recommended to use diversion dyke.

Attention to Land Reclamation in the Years of Stagnation in the Republic of Uzbekistan

The “Farkhod Hydroelectric Power Station” which was built in Syrdarya region has irrigated 700,000 hectares of fertile land in Dalvarzin and Mirzachul districts of Uzbekistan, Tajikistan and Kazakhstan. “Andijan water reservoir” was built in the Karadarya River of Fergana Valley, and a hydroelectric power plant with a capacity of 140,000,000 kilowatt-hours was commissioned. Due to the commissioning of “Tuyamuyin” waterworks in the lower reaches of the Amudarya River, it was possible to irrigate 300,000 hectares of land in the Republic of Turkmenistan and Uzbekistan, as well as 200,000 hectares of new land for rice and cotton growing. In addition, this water facility has protected the land from erosion and provided with 150,000 kilowatts of electricity.

The Interiority of Sleep & Power

<p>This thesis explores interior immensity through the framework that targets the human being’s most inner self: the time human beings spend sleeping. The in-between state of sleep is left overlooked in architecture and leaves room for novel exploration. While spending time in a semi-conscious state, we can delve into the realms of the unknown. The primary goal is to challenge the conventional interior space of backpackers in New Zealand by inhabiting the beautiful ugliness of an industrial site. The boundary between the individual and mechanical piece of architecture is explored through a whimsical intimacy. A hydroelectric power station is the chosen apparatus. The power station allows a duality between operation and narration, between thematic qualities and program. The abnormalities hype the super-imagination of the client, somewhat like experiencing a dream state, the most active and often fantastic aspect within the threshold of consciousness.The thesis is grounded in three sections. I firstly explore the pragmatic site anomalies, the thematic qualities and their opportunities. I then move into conceptual exploration of the interior imagination while concluding with a fully functioning yet evocative design of sleep narration. The components of this thesis are largely visual.</p>