scholarly journals Electromagnetic reflection survey 1986 at the Inland Ice margin of the Pâkitsoq basin, central West Greenland

1987 ◽  
Vol 135 ◽  
pp. 87-95
Author(s):  
L Thorning ◽  
E Hansen
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Field Work ◽  
Ice Thickness ◽  
Data Sets ◽  
Hydroelectric Power ◽  
Subglacial Topography ◽  
Series Of Experiments ◽  
Inland Ice

The first successful application of electromagnetic ref1ection (EMR) techniques for determination of ice thickness in the outermost margin of the Inland Ice adjacent to the Pâkitsoq basin took place in luly 1985 (Thorning et al., 1986). Although the survey was planned as a series of experiments to examine why previous attempts had not worked, the EMR data acquired were of very good quality and could be compiled into a preliminary map of ice thickness and a map of the subglacial topography over part of the region. Thus, by early 1986 it Rapp. Grønlands geol. Unders. 135, 87-95 (1987) was known that the method worked and could be compiled through to the final product. With the increasing interest in this region, which is the planned location of the first hydroelectric power plant in Greenland, it was necessary to return in 1986 to survey the area in greater detail and to extend the coverage to the east. This note describes the field work carried out in April 1986 and the subsequent compilation and analysis of the combined EMR data sets from 1985 and 1986.

EXPERIMENTAL DETERMINATION OF THE DISCHARGE COEFFICIENT OF A FLOODGATE AND THE SURFACE ROUGHNESS SCALE IN A PHYSICAL MODEL OF A SMALL HYDROELECTRIC POWER PLANT

2020 ◽  
Author(s):  
Hélio Augusto Goulart Diniz ◽  
Lúcio Sant'Anna Purri Miranda ◽  
Gleberson Marques Humia ◽  
MATHEUS PHILIP MENEZES ROCHA ◽  
Henrique Mendes Sampaio ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Power Plant ◽  
Experimental Determination ◽  
Physical Model ◽  
Discharge Coefficient ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power

scholarly journals APPLICATION OF CALIBRATION CERTIFICATE OF DIGITAL LEVELING SYSTEMS IN THE MONITORING OF STRUCTURES: A CASE STUDY AT THE GOVERNADOR JOSÉ RICHA HYDROELECTRIC POWER PLANT - PR

2018 ◽  
Vol 24 (2) ◽  
pp. 235-249 ◽  
Author(s):  
Alyne Raminelli Siguel Gemin ◽  
Érica Santos Matos ◽  
Pedro Luís Faggion
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
Calibration System ◽  
First Order ◽  
The Past ◽  
Over Time ◽  
Equipment Performance

Abstract: The monitoring of the vertical behavior of benchmarks installed in the dam crest of the Governador José Richa hydroelectric power plant (UHGJR) has been performed by the first-order differential leveling method with the use of digital leveling systems which are composed of a digital level and a invar barcode rod. By default, the scales of these instruments are the same, but over time both can change, degrading the observations. In the past, the simultaneous calibration of these systems was not considered in the determination of UHGJR settlements, however, after the development of the first calibration system of digital leveling systems in Brazil, it was possible to investigate the equipment performance as well as to determine a scale factor to be applied to correct the level readings. The results achieved are the systems calibration used in the monitoring of the UHGJR and the calibration certificate application in leveled sections in November 2016. The maximum correction applied to the elevation differences was of the order of nine tenths of millimeters, result attributed to the region observed in the rod, since the deviations obtained in the calibration vary according to the reading position at the rod.

scholarly journals The Trichoptera (Insecta) of the lower Kunene River in Namibia and Angola

Zoosymposia ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 134-150
Author(s):  
WOLFRAM MEY ◽  
FERDINAND C. DE MOOR
Keyword(s):  
New Species ◽  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Field Work ◽  
Hydroelectric Power ◽  
Light Traps ◽  
Generic Level ◽  
The Past

The Trichoptera of the lower Kunene River were collected at irregular intervals from 1994 to 2012 by the first author. Samples were taken mainly at several localities on the Namibian side of the border downstream of the Ruacana hydroelectric power plant. Field work concentrated on adults, which were collected by light traps. Together with results of previous investigations a total of 41 species in 16 genera covering five families are now recorded from the river. About four species were found as immatures in the past, and were identified to generic level only. The first author has collected 27 species including nine undescribed ones: Catoxyethira kunenica sp. nov., Orthotrichia epupae sp. nov., O. vadalis sp. nov., O. kunenensis sp. nov., Ecnomus magnus sp. nov., E. quadrangulatus sp. nov., E. (Psychomyiellodes) statzneri sp. nov., E. (Psychomyiellodes) angonamus sp. nov. and Ceraclea (Pseudoleptocerus) lepidopterella sp. nov. Descriptions and illustrations of the genitalia of the new species are provided. Two species were synonymized: Oecetis kunenensis Barnard, 1934 = Oectis reticulatella Kimmins, 1957, syn. nov. and Oecetis tripunctata (Fabricius, 1793) = Oecetis ovamboensis Barnard, 1934, syn. nov.

scholarly journals Hazards caused by natural and anthropogenic changes of catchment area in karst

2004 ◽  
Vol 4 (5/6) ◽  
pp. 655-661 ◽  
Author(s):  
O. Bonacci
Keyword(s):  
Power Plant ◽  
Catchment Area ◽  
Hydroelectric Power Plant ◽  
Anthropogenic Factors ◽  
Hydroelectric Power ◽  
Dinaric Karst ◽  
Starting Point ◽  
Interbasin Water Transfer ◽  
Natural And Anthropogenic Factors

Abstract. Determination of the catchment area is the starting point in most hydrological analyses. It serves as a basis for many hydrological and water resources management calculations. The catchment boundaries and areas in karst regions are often fragmented and not accurately known. They can change over time due to natural and anthropogenic causes. Natural and man-made processes cause changes of catchment area on different time and space scales. Human intervention, especially construction of dams and reservoirs, as well as interbasin water transfer through long tunnels and pipelines can introduce instantaneous, definite and hazardous change. This paper presents seven examples of natural and anthropogenic factors which influenced changes of catchment area in the Dinaric karst: 1) Closing of the Obod Estavelle in the Fatniceko polje; 2) Operation of the Zakucac hydroelectric power plant on the Cetina River; 3) Problems caused by Salakovac Reservoir; 4) Catastrophic flooding in the Cetinje Polje; 5) Regulation and canalization of the Trebišnjica River; 6) Building of the underground hydroelectric power plant Ombla; 7) An earthquake in Southern Croatia and Western Herzegovina.

Water Level Control of Small-scale Hydroelectric Power Plant

2002 ◽  
Vol 122 (6) ◽  
pp. 989-994
Author(s):  
Shinichiro Endo ◽  
Masami Konishi ◽  
Hirosuke Imabayashi ◽  
Hayami Sugiyama
Keyword(s):  
Power Plant ◽  
Water Level ◽  
Hydroelectric Power Plant ◽  
Small Scale ◽  
Hydroelectric Power ◽  
Level Control

Hydroelectric Power-Plant Simulator Implemented in Python

2021 ◽  
Author(s):  
Michal Kuchar ◽  
Adam Peichl ◽  
Milan Kucera ◽  
Jaromir Fiser ◽  
Pavel Kulik ◽  
...  
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power

scholarly journals Dynamics of Lady’s slipper orchid (Cypripedium calceolus L.) population at Lake Kwiecko (West Pomerania)

2014 ◽  
Vol 36 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Maciej Korczyński ◽  
Ewa Krasicka-Korczyńska
Keyword(s):  
Power Plant ◽  
Endangered Species ◽  
Rare Species ◽  
Negative Impact ◽  
Good Condition ◽  
Hydroelectric Power Plant ◽  
Field Observations ◽  
Hydroelectric Power ◽  
Cypripedium Calceolus ◽  
Slipper Orchid

Abstract Cypripedium calceolus is considered an endangered species in the territory of Poland. Population of this rare species, situated at Lake Kwiecko (Western Pomerania), was regularly monitored in the years 1986-2013. The studied population has been under the permanent influence of the nearby hydroelectric power plant for almost 45 years. The field observations showed that the power plant had no negative impact on the condition of Cypripedium calceolus population. An indication of its good condition was, among others, an increase in the size - from 150 to 350 specimens within the study period.

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