Damage to Drinking Water Systems and Restoration Measures after the Great East Japan Earthquake and Tsunami. July 2011

Transcription

1 JWRC Damage to Drinking Water Systems and Restoration Measures after the Great East Japan Earthquake and Tsunami July 2011 The Japan Water Research Center 1

2 Summary of the Great East Japan Earthquake Date and Time: Magnitude: Hypocenter: Mechanism: Earthquake Early Warning: JMA Seismic Intensity: 11 March :46 JST (05:46 UTC) 9.0 (interim value; the largest earthquake recorded in Japan) N38.1, E142.9 (130km ESE off Oshika Peninsula) Depth 24km (interim value) Reverse fault type with WNW-ESE compressional axis (by CMT analysis) Issued 8.6 seconds after the detection of the first P-wave at the nearest seismic station 7 (Max) Kurihara City of Miyagi Prefecture cities and towns (including Wakuya Town, Tome City, Osaki City, Natori City) in Miyagi, Fukushima, Ibaraki, and Tochigi Prefectures 6- or weaker Observed nationwide from Hokkaido to Kyushu (Source) 2

3 JMA Seismic Intensity of the Great East Japan Earthquake Hypocenter (Note) JMA : Japan Meteorological Agency JMA Seismic Intensity Upper Lower Upper Lower Hypocenter (Source) 3

4 Major Pattern of Damage to Drinking Water Systems by the Great East Japan Earthquake Earthquake damage only (Inland area) Damage due to both earthquake and tsunami (Northeastern coast area) Damage due to liquefaction (Reclaimed land) Adverse effect by the Fukushima No 1 nuclear power plant accident 4

5 Water Outage by the Earthquake & Tsunami and Restoration of Water Supply 5

6 Water Outage by the Great East Japan Earthquake and Restoration of Water Supply (Source) 6

7 Number of houseconnections without water 17,000 16,000 15,000 14,000 13,000 12,000 11,000 10,000 9,000 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 March 13, 2011 March 20, 2011 March 27, 2011 April 3, 2011 April 10, 2011 April 17, 2011 April 24, 2011 May 1, 2011 May 8, 2011 May 15, 2011 May 22, 2011 May 29, 2011 Water outage due to the Great East Japan Earthquake with Tsunami in Iwate Prefecture Ofunato City Rikuzentakada City Kamaishi City Otsuchi Town Miyako City Yamada Town June 5, 2011 June 12, 2011 June 19, 2011 Note : The water supply recovered early during a month after the Earthquake in the areas not affected by tsunami while it has still been suspended in the most tsunami-affected areas. 7

8 Number of houseconnecitons without water 45,000 40,000 35,000 30,000 Morioka City Oshu City Ichinoseki City Kuji City 25,000 Aftershock of April 7 20,000 15,000 10,000 5,000 0 March 17, 2011 March 13, 2011 March 15, 2011 March 19, 2011 March 21, 2011 March 23, 2011 March 25, 2011 March 27, 2011 March 29, 2011 March 31, 2011 April 2, 2011 April 4, 2011 April 6, 2011 April 8, 2011 April 10, 2011 April 12, 2011 Water outage due to the Great East Japan Earthquake without Tsunami in Iwate Prefecture April 14, 2011 April 16, 2011 April 18, 2011 April 20, 2011 April 22, 2011 April 24, 2011 April 26, 2011 Note : Depending on the areas, the water supply was recovered about ten days after the Earthquake. An aftershock on April 7 left some areas without water supplies. 8

9 Typical Cases of Damage to Drinking Water Systems 9

10 Damage due to Tsunami to Takekoma Treatment Plant of Rikuzentakada City Note : The water source of Takekoma TP is shallow wells which were possibly salinized and contaminated by various substances. 10

11 Damage to No.2 Sukedukuri Intake Facility in Minamisanriku Town Note : The water source of No.2 Sukedukuri Intake facility is shallow wells which were possibly salinized. 11

12 Damage due to Liquefaction at the Wanigawa WPP in Ibaraki Prefecture 12

13 Setup of the Special Headquarters on Emergency Supply and Restoration in the Affected areas in March 2011 Member organizations Japan Water Research Center Ministry of Health, Labour and Welfare Japan Water Works Association Japan Pumping Heating and Airconditioning Constructor s Association Special HQ All Japan Water Supply Works Union Federation of Japan Water Industries, Inc. Japan Small Scale Water Works Association All-Japan Prefectural and Municipal Workers Union 13

14 JWRC s Activities for Restoration & Reconstruction of Drinking Water Systems Fact Findings Emergency Response Proposal for Recovery and Reconstruction Scientific Research for the Future 14

15 Fact Findings & Response Activities by the JWRC * Formation of JWRC s Supporting Team for Drinking Water Purification Technology * Gathering & Providing Information on the Great East Japan Earthquake * Site Survey by the Supporting Team Members to Damaged Areas * Research Activities on Earthquake Vulnerability Assessment * Proposal on Future Plan of Drinking Water Systems 15

16 JWRC 16