Vattenfall aB GeneRatIOn nORDIC CeRtIfIeD enVIROnmental ...

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4 Additional environmental information0 The table below is a condensation of biodiversity impact for the 14 selected power stations related to electricity generation over 100 years. The Biotope Method requires that the digit accuracy of the results mirror the uncertainty in underlying data. The site with the lowest quality level decides the digit accuracy in the aggregated result. In this case 76 % of the sites were studied with quality level C and consequently the aggregated result can be presented with one value digit accuracy. The aggregated biotope change at the 14 selected sites is a considerable but necessary simplification. The specific values in the table are nonetheless indicative of ecological effects of Vattenfall’s Nordic hydropower. The results should be interpreted based on the whole of this section. Category Biotope change (ha) Change per kWh electricity (m 2 /kWh el) Critical biotope -30 000 -3 . 10 -4 Rare biotope -20 000 -2 . 10 -4 General biotope 30 000 3 . 10 -4 Technotope 20 000 2 . 10 -4 4.2 Land and Water Use 4.2.1 Description of land use in the river regions The following is a description of land and water exploitation in the different river regions caused by the selected stations. 4.2.1.1 Norra Norrland In the river region Norra Norrland four stations have been studied in the river Lule älv. River region Norra Norrland is characterised by vast water reservoirs and a large annual average hydropower generation. The four stations exploit 14 % of the total land and water area that is exploited by the 14 selected stations and they contribute app. 47 % to the annual average generation. River Lule älv Area and biotope data have been compiled for and presented in previous EPD. The average annual generation data has however been updated. Seitevare, Tjaktjajaure (qualitiy level B2) The Tjaktjajaure annual reservoir at Seitevare represents more than 75 % of the area occupied by the four stations. Biotope classification before exploitation is largely based on aerial photographs. Biotope characterization is based on an area-specific standard list, and 60 % of the area harboured among other the following critical biotopes: streaming water, rapids, oxbow lakes, backwaters, and riverine grasslands. Post-exploitation condition assessment is based on actual biological data, and shows that 78 % of the area constitutes technotope and that the remainder is general biotope. No critical biotope remains. The reservoir, one of five gravel pits, a water-filled quarry, and an area where buildings have been dismantled are characterised as general biotope. The maps below show biotope categories for Seitevare power station and the eastern part of Tjaktjajaure annual reservoir before and after exploitation. © Vattenfall AB Generation Nordic 2008 27
4 Additional environmental information 0 5 km N Critical biotope Rare biotope General biotope Östra Seitevare – Tjaktajaure, categories Before. 0 5 km N 79,5 % Technotope 20,5 % General biotope Critical biotope Rare biotope General biotope Technotope Östra Seitevare – Tjaktajaure, categories After. © Vattenfall AB Generation Nordic 2008 28
Page 1 and 2: Vattenfall AB GENERATION NORDIC Cer
Page 3 and 4: SUmmary Distribution of electricity
Page 5 and 6: Content 1 Introduction 1 1.1 Declar
Page 7 and 8: 1 INTRODUCTION 1.3 Vattenfall, LCA,
Page 9 and 10: 2 PRODUCER AND PRODUCT Vattenfall h
Page 11 and 12: 2 PRODUCER AND PRODUCT 2.4 Electric
Page 13 and 14: 3 Environmental performance based o
Page 15 and 16: 3 Environmental performance BASEd o
Page 30 and 31: 4 Additional environmental informat
Page 48 and 49: 5 Information from the CERTIFICATIO

Vattenfall aB GeneRatIOn nORDIC CeRtIfIeD enVIROnmental ...

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