| 词条 | Okutadami Dam |
| 释义 |
| name = Okutadami Dam | name_official = | image = Okutadami Dam 001.jpg | image_size = | image_caption = | image_alt = | location_map = Japan | location_map_size = | location_map_caption = | coordinates = {{coord|37|09|12|N|139|15|00|E|type:landmark|display=inline,title}} | country = Japan | location = Uonuma | status = | construction_began = 1953 | opening = 1961 | demolished = | cost = | owner = Electric Power Development Company | dam_type = Gravity | dam_height = {{Convert|157|m|ft|0|abbr=on}} | dam_height_thalweg = | dam_height_foundation= | dam_length = {{Convert|475|m|ft|0|abbr=on}} | dam_width_crest = | dam_width_base = | dam_volume = {{Convert|1636000|m3|cuyd|0|abbr=on}} | dam_elevation_crest = | dam_crosses = Tadami River | spillway_count = | spillway_type = | spillway_capacity = | res_name = Lake Okutadami | res_capacity_total = {{Convert|601000000|m3|acre.ft|0|abbr=on}} | res_capacity_active ={{Convert|458000000|m3|acre.ft|0|abbr=on}} | res_capacity_inactive= | res_catchment = {{Convert|595|km2|sqmi|0|abbr=on}} | res_surface = {{Convert|1150|ha|acre|0|abbr=on}}[1] | res_elevation ={{Convert|750|m|ft|0|abbr=on}} | res_max_depth = | res_max_length = | res_max_width = | plant_hydraulic_head = 120 MW units: {{Convert|170|m|ft|0|abbr=on}} 200 MW unit: {{Convert|164.2|m|ft|0|abbr=on}} | res_tidal_range = | plant_operator = | plant_commission = 1960, 2003 | plant_decommission = | plant_type = | plant_turbines = 3 x 120 MW, 1 x 200 MW Francis-type | plant_capacity = 560 MW | plant_annual_gen = | website = | extra = }} The Okutadami Dam (奥只見ダム) is a concrete gravity dam on the Tadami River, {{Convert|26|km|mi|0|abbr=on}} east of Uonuma on the border of Niigata and Fukushima Prefectures, Japan. The primary purpose of the dam is hydroelectric power generation and it supports a 560 MW power station which is the largest conventional hydroelectric power station in Japan.[2] The dam also forms the second largest reservoir in Japan, next to that of the Tokuyama Dam.[2] BackgroundConstruction on the dam began and its original 390 MW power station was commissioned 2 December 1960. The rest of the project was complete in 1961. Between 1999 and 2003, the power station was expanded, adding 200 MW in installed capacity. In addition, a 2.7 MW generator was added to ensure a flow of {{Convert|2.5|m3/s|ft3/s|0|abbr=on}} downstream for environmental purposes.[3] Along with the same power plant upgrade, a second Kaplan turbine-generator was added to the {{Convert|83|m|ft|0|abbr=on}} tall Otori Dam's power station downstream at {{Coord|37|12|53|N|139|12|50|E|name=Otori Dam}}. This generator has an 87 MW capacity in addition to the existing 95 MW unit, for an installed capacity of 182 MW.[4] DesignThe Okutadami Dam is a {{Convert|157|m|ft|0|abbr=on}} tall and {{Convert|475|m|ft|0|abbr=on}} long concrete gravity dam with a structural volume of {{Convert|1636000|m3|cuyd|0|abbr=on}}. Sitting at the head of a {{Convert|595|km2|sqmi|0|abbr=on}} catchment area, the dam creates a reservoir with a {{Convert|601000000|m3|acre.ft|0|abbr=on}} capacity of which {{Convert|458000000|m3|acre.ft|0|abbr=on}} is active (or "useful") storage. The reservoir has a surface area of {{Convert|1150|ha|acre|0|abbr=on}}. The power station is underground and located on the right bank of the river next to the dam's abutment. It consists of two underground caverns, one for the original power station and another adjacent for the expansion. After being received by the dam's intake, water supplied to the original power plant travels down three penstocks {{Convert|185|-|189|m|ft|0|abbr=on}} in length before reaching an individual 120 MW Francis turbine-generator. The 200 MW Francis turbine-generator receives water via a {{Convert|280|m|ft|0|abbr=on}} long penstock. After water is processed through the generators, its travels down two tailrace tunnels before being discharged over {{Convert|3|km|mi|0|abbr=on}} downstream at the upstream edge of the Otori Reservoir.[5] References1. ^{{cite web|title=Okutadami Dam|url=http://damnet.or.jp/cgi-bin/binranA/All.cgi?db4=0500|publisher=Japan Dam Handbook|accessdate=14 August 2011}} {{stack|{{Portal|Japan|Water|Renewable energy}}}}{{GeoGroupTemplate}}{{Dams in Niigata Prefecture}}{{Dams in Fukushima Prefecture}}{{Commons category|Lake Okutadami}}2. ^{{cite web|title=Dam Okutadami|url=http://dammania.net/niigata/okutadami.html|publisher=DamMania|accessdate=14 August 2011|language=Japanese}} 3. ^1 {{cite web|title=Start of Commercial Operation of the Okutadami (Extension) and Otori (Extension) Hydropower Plants and of the Okutadami-dam Ecological Flow Hydropower Plant|url=http://www.jpower.co.jp/english/news_release/news/news176.pdf|publisher=J-Power|accessdate=14 August 2011}} 4. ^{{cite web|last=Sato|first=Asami|title=Commissioning of 87,000-kW Kaplan Turbine and Generator for Otori Power Statio|url=http://www.hitachi.com/ICSFiles/afieldfile/2004/09/07/r2004_03_104.pdf|publisher=Hitachi|accessdate=14 August 2011|author2=Keiichi Got0}} 5. ^{{cite web|title=Case study 01-02: Biological Diversity - Okutadami and Ohtori Expansion Hydropower Project, Japan|url=http://www.ieahydro.org/reports/Annex_VIII_CaseStudy0102_Okutadami_Ohtori_Japan.pdf|work=IEA Hydropower Implementing Agreement Annex VIII: Hydropower Good Practices: Environmental Mitigation Measures and Benefit|publisher=New Energy Foundation|accessdate=14 August 2011|year=2006|deadurl=yes|archiveurl=https://web.archive.org/web/20111003104335/http://www.ieahydro.org/reports/Annex_VIII_CaseStudy0102_Okutadami_Ohtori_Japan.pdf|archivedate=3 October 2011|df=}} 8 : Dams in Fukushima Prefecture|Dams in Niigata Prefecture|Hydroelectric power stations in Japan|Gravity dams|Dams completed in 1961|Dams on the Tadami River|1961 establishments in Japan|Energy infrastructure completed in 1961 |
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