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1 Presenter : Dr. Kung, Chen_Shan July 6, 2018 Water Resources Agency, MOEA, Taiwan 1

Flood Defense Policy 1986 before Rural area Flood Defense, 2003 Bio-Engineering, 2004 July 2 Flood, 2004 Basin Management, 2014 Toraji 2001 Nari 2001 Chichi Earthquake 1999 June 12 Flood, 2005 Morak,

2 Flood Defense Policy 1986 before Rural area Flood Defense, 2003 Bio-Engineering, 2004 July 2 Flood, 2004 Basin Management, 2014 Toraji 2001 Nari 2001 Chichi Earthquake 1999 June 12 Flood, 2005 Morak, 2009 Basin Management Kangrui, River Dike Defense Drainage Improvement Flood mitigation program 河川 River Environment Restoration Coastal Environment Restoration Draniage Environment Restoration Basin Management Infrastructure Modernization 2

Basin Management-From Line to Space Flood Management Rural Stage 1.Escape 2.Inundation Flood Control 1.Channel Regulation 2.Land Use Over Development Flood Defense 1.Flood Defense 2.

3 Basin Management-From Line to Space Flood Management Rural Stage 1.Escape 2.Inundation Flood Control 1.Channel Regulation 2.Land Use Over Development Flood Defense 1.Flood Defense 2.Piroity to Real Estate Development 3. Channelization 1.People-Land- Water Harmonization 2.Basin Integration 3.Basin Water Environment Restoration 4.Runoff Control Planning Engineering Management Flood Defense Dike Construction Channel Management Runoff Control Engineering & Non- Engineering Runoff Management 3

work YuanShanTze flood Diversion Work 石門水庫 Flood Defense

4 Policy of Flood Defense for Tanshui River Downstream Area YuanShanTze 翡翠水庫 for Keelung River flood defense work YuanShanTze flood Diversion Work 石門水庫 Flood Defense Work, years Flood Defense No over flow for 500 years flood 4

5 New Taipei City Keelung River Basin, 491 km 2, Main Stream 86.4 Km, one of Tributaries of Tanshui River 5

area Highly urban development on the middle and downstream river valley River

6 Flood characteristics of Keelung River Heavy rainfall on the upstream area Meandering at middle stream river valley area Estuary river on the downstream area Highly urban development on the middle and downstream river valley River channel was narrowed by human development Typhoon Nari, 2001 Typhoon Nari,

7 Flood Disaster of Keelung river Typhoon Event Inundation Area(Ha) Lynen(87) Ruibe(97) Barbis(98) Xangsane (00) Nari(01) 1, ,710 Depth(m) 0.2~ ~ ~ ~ ~8.5 Death (Person) Damage US$ 30 billions Typhoon Xangsane,

8 長安橋千祥橋五堵五堵水文站南湖大橋社後下社后橋樟樹灣江北橋街後汐止下寮南港 Flood Area of Typhoon Ruibo and Barbis,1998 8

9 水位 (m) 台灣海峽 Maximum Discharge of Typhoon Xangsane Q=2600 cms 河口 1.33 淡水河二重疏洪道關渡平原淡水河匯流口 2.94 基社子島隆河大龍 4.65 中山橋 5.80 百齡橋大直橋 7.30 Flood at middle stream area of Keelung River due to lower dike elevation 南湖大橋 * 缺五堵長安橋河口 1.33 大漢溪匯流口 2.94 新店溪社后橋麥帥橋 8.70 成功 9.33 大直橋中山橋南湖大橋五堵 9

10 Flood Area of Typhoon Xangsane,

水位 (m) 台灣海峽河口 1.74 河口淡水河 Maximum Discharge of Typhoon Nari Q=3300 cms 二重疏洪道大漢溪匯流口 2.63 匯流口 2.63 關渡平原基社子島淡隆河水河大龍 5.52 中山橋 6.3~7.25 新店溪百齡橋中山橋新生 7.63 大直橋 5.52 7 8.

11 水位 (m) 台灣海峽河口 1.74 河口淡水河 Maximum Discharge of Typhoon Nari Q=3300 cms 二重疏洪道大漢溪匯流口 2.63 匯流口 2.63 關渡平原基社子島淡隆河水河大龍 5.52 中山橋 6.3~7.25 新店溪百齡橋中山橋新生 7.63 大直橋大直橋 8.30 松山 Flood at middle stream area of Keelung River due to lower dike elevation 成美 9.66 南湖大橋社后橋南湖大橋長安橋 * 五堵五堵 11

12 Badu Railway bridge Wudu Railway station Jiangbei Bridge, Xizhi Xangsane Rd, Xizhi Flood of Typhoon Nari on Keelung River 12

13 Qidu 五堵交流道 Xiwan Rd Typhoon Nari 汐萬路 Jiangbei bridge 大同路 Nangang 環東大道 13

14 Flood Defense Work of Keelung River Project Area: Nankang, Xizi, Ruifang, Houdong, Pinxi Districts and Keelung, total length is 59.5 km. Project contents: YuanShanTze Diversion Work Dike Work Drainage and pump station on Tributaries Bridge modification work Yuanshan bottom neck improvement work Flood Warning system 14

15 Dike improvement Work Qidu, Dahua (Before) Baifu (Before) Qidu, Dahua (After) Baifu (After) 15

16 Dike Improvement Work Guogang (Before) Guogang, Qiaodong (Before) Guogang (After) Guogang, Qiaodong (After) 16

17 Dike Improvement Work Qiaodong (Before) Beishan (Before) Qiaodong (After) Beishan (After) 17

18 YuanShanTze Diversion Work Diversion Principle Divert Q=1310 cms to East Sea from Q=1620 cms for 200 years flood. Downstream q=310 cms for Base flow. Main Work Entrance and Dissipation work 2.48 Km long Concrete Tunnel with 12 m diameters 3 check dams with 3 m height and 75 m width Construction Period Begin June 5, 2002, complete Oct 28, Budget US$ 2 billions 18

19 19

20 瑞芳斷層魚桀魚坑斷層番子澳斷層圖例崩積層大寮層砂岩段石底層砂岩段南港層砂岩段煤碴堆積河階堆積層大寮層砂頁岩互層段石底層砂頁岩互層段南港層砂頁岩互層段回填土火山碎屑堆積大寮層頁岩段石底層頁岩段斷層線 20

21 YuanShanTze flood Diversionphotographs of progress Mar,2003-Before the tunnel excavation Nov,2003-Lining of tunnel May,2003-The tunnel excavation May,2003-Completion of tunnel 21

22 YuanShanTze flood Diversionphotographs of progress May,2005-Diversion Weir Jan,2005-Outlet Construction Jan,2005 Completion of downstream weir Jan,2005-Top of outlet 22

0M Flood way 8.0Mx2.5Mx2 Sluice Way 6.0Mx3.

23 Bird View of YuanShanTze Diversion Work Sluice Way Weir Overflow weir Maintance Center River Bed EL=60.0M Weir H= 8.0M L= 30.0M Flood way 8.0Mx2.5Mx2 Sluice Way 6.0Mx3.0Mx2 Overflow weir EL=62.5M Diversion Weir EL=63.0 Outlet EL=4.0M Highway 37 Tunnel Entrance 23

24 Bird View of Outlet Bird View of Entrance 24

25 基隆河進水口土資場深澳港九份溪九份溪過河段野溪野溪金石園出水口 25

Close Sluice way when water level to EL63.0 m, starting overflow 4.

26 Management One management Center with 3 personal Work Flood operation 1.Automatic Overflow 2.Open Sluiceway for river flushing 3.Close Sluice way when water level to EL63.0 m, starting overflow 4.Open Sluice way for water level down to EL62.5 m, for flushing sand Over flow, 2005 Over flow, Sep 01,

27 Typhoon Sula Aug 1,2012 PM 2:30 water level 62.5M

28 Typhoon Sula Aug 2,2012 AM6:30 water level 65.0M

29 Typhoon Sula Aug 2,2012 AM6:30 water level 65.0M

30 Typhoon Sula Aug 2,2012 AM6:30 water level 65.0M

31 Visiting Program Feb 19,2016 Defense University April 29,2016 Chungyuan University May 26,2016 APEC Group July 13,2016 Disaster Prevention Center 31

32 Social-Economic Benefit The land price of Xizhi area was lower down and people migrated out of Xizhi due to serious flood from 1999 to The flood is diminished after YuanShanTze diversion project. The population of Xizhi area was 176,130 from 2002 to The population was increased to 196,028 after The house price increase from 38,000/m 2 to 79,400/m 2 from 2005 to Reduce Dike Construction Cost around US$ 1.5 Billions 32

33 Social-Economic Benefit 44 diversion events until Total diversion volume is 200 millions m³. Reduce downstream flood hazard for 13 years. Up to 1500 people visit YuanShanTze Work per year. Provide education to the ordinary people and young engineers. The economic benefit: around US$ 1.6 Billions from reducing damage of downstream areas. 33

34 Thank you for your attention Presenter:Dr. Kung Chen Shan July 6, 2018 Water Resources Agency, MOEA,Taiwan 34

宏碩-觀光指南coverX.ai

宏碩-觀光指南coverX.ai Time for Taiwan Taiwan-The Heart of Asia Time for Taiwan www.taiwan.net.tw Part 1 01 CONTENTS 04 Part 1 06 Part 2 GO 06 14 22 30 38 Part 3 200+ 02 Part 1 03 1 2 3 4 5 6 04 Jan Feb Mar Apr May Jun Part