21 September 2011 At the 3 rd WEPA workshop on water quality management. Katsunori Takagi

Transcription

1 21 September 2011 At the 3 rd WEPA workshop on water quality management Katsunori Takagi NARBO (Network of Asian River Basin Organization) Water Resources Engineering Department Japan Water Agency 1 1.Water Resources Development Promotion Law Water Resources Development Basic Plan ( Full Plan ) for each river system 2.Japan Water Agency Law JWA s activities New construction and reconstruction of Water Resources Development Facilities and operation of those completed structures Water utilization Domestic Water Industrial Water Irrigation Water Flood control Ministers s supervising JWA s activities 2 1

2 Tone & Ara River system - Total basin area:19,780km2 - Completed project: 21 - Under construction:3 - Population supplied: 15 million people - Irrigated area:94,000ha - Contribution for industrial shipment:3.2 trillion yen/yr Yagisawa Dam Toyo & Kiso River system - Total basin area:9,824km2 - Completed project: 14 - Under construction:2 - Population supplied: 8.5 million people - Irrigated area:52,000ha - Contribution for industrial shipment:5.2 trillion yen/yr Nagaragawa Estuary Barrage Yodo River system - Total basin area:8,240km2 - Completed project: 11 - Under construction:2 - Population supplied: 12 million people - Irrigated area:1,000ha - Contribution for industrial shipment:2.1 trillion yen/yr Lake Biwa Development Yoshino River system - Total basin area:3,750km2 - Completed project: 8 - Population supplied: 1.5 million people - Irrigated area:40,000ha - Contribution for industrial shipment:2.0 trillion yen/yr Sameura Dam On-going projects:11 Completed project:58 Location of JWA Project Chikugo River system - Total basin area:2,860km2 - Completed project: 4 - Under Construction:4 - Population supplied: 1.3 million people - Irrigated area:40,000ha - Contribution for industrial shipment:0.02 trillion yen/yr Terauchi Dam 4 3 2

3 JWA have constructed and operated dams and canals for supplying domestic (drinking), agricultural, industrial water and also doing flood control. KISO River system Area Total population Sum of industrial shipments 16.7 % 50.9 % 46.6 % 83.3% 49.1% 53.4% YODO River system YOSHINO River system TOYO River system The Pacific Belt, where concentrated population and industrial area in Japan. TONE and ARA River system Full plan areas Other areas The total area of the districts under the Water Resources Development Basic Plan (districts receiving water supply from the seven river systems) account for only 17% of the national land area, but about 50% of the population and industrial output are concentrated there. CHIKUGO River system 5 Planning, examination, designing, estimate, construction work control, maintenance, operation, management of water resources and flood control facilities etc Civil Engineer ; 800 Mechanical Engineer ; 100 Electrical Engineer ; 150 Treasurer, Lawyer and Staffs in charge of site acquisition ; 400 Around 70 staff from the national governments is working in JWA. Around 100 JWA staff are working in both National and Local Governments. 1,450 staffs are working for JWA. 6 3

4 Water quality conservation efforts at Agigawa Dam 岩屋ダム 牧尾ダム 味噌川ダム 中央アルプスThe length of the river : 227 km Agigawa gg Dam 徳山ダム 長良川揖斐川Kiso River 兼山取水口 濃尾平野 愛知用水長良川河口堰 知多半島 110 km away from the river mouth of the Kiso River 伊勢湾 渥美半島 7 The Kiso River 大井ダム Population in catchment area :7,800 Number of cattle:800 cows and 2,300 pigs Area of cultivated land:900ha Ena City Agigawa Dam Rock-fill dam Storage capacity:48 million m3 Height :101.5m Area of reservoir:1.58km2 Drain by human activities Nutrient salts like nitrogen, phosphorous 中津川 flows into the reservoir Catchment area :81.8km2 The reservoir became eutrophic lake Phytoplankton increase more 8 4

5 Various types of facilities to maintain water quality (Prepared at dam construction stage) Surface aeration 水質保全対策の取り組み ( 建設時代 ) Selective water withdrawal equipment equipment Check dam Check dam Deep aeration equipment Check dam 8 9 The situation water bloom outbreak in 2002 (The reservoir totally covered with water bloom) Cause of phytoplankton : Microcystis Period : July to October 10 5

6 Special committee for water quality improvement After massive outbreak of water bloom in 2002 JWA called for setting up the special committee for water quality improvement in Agigawa dam reservoir. The members are: Academic professionals MLIT (River administrator) Local governments and municipalities concerned JWA (RBO and operates and maintains Agigawa dam) The 9 th (last) meeting on March 11, 2011 was set up It held meetings nine times and it was dissolved after the last meeting on March 11, Professor Matsuo Professor Ishida 12 Mechanism of water quality conservation by aeration Photic layer Aphotic layer 1.Water bloom floating on the reservoir surface is taken into the deep aphotic layer where the sunlight doesn t reach by aeration. 2. Water bloom is difficult to grow in the aphotic layer due to insufficient sunlight. 3. Then massive outbreak of water bloom is curbed. 13 6

7 Two types of aeration equipment Type 1 Type 2 Type 1 : Water level adaptable type (Mobile type) 20m Type 2 : Not water level adaptable type (Fixed type) 14 Nine aeration equipment newly installed to improve water quality in the reservoir Water level adaptable type (mobile type) Not water level adaptable type (fixed type) Aeration equipment arrangement plan 15 7

8 The effect by aeration equipment in summer, 2010 Before installation In summer, 2002 Aeration equipment working After installation In summer, 2010 After aeration Water bloom outbreak was evaded by curbing phytoplankton increase after installation of aeration equipment 16 Efforts to reduce pollutant load in the reservoir area Agigawa Dam Operation and Office set up the cconference to try to reduce pollutant load, nutrient salt etc., which is flowing into the reservoir, by implementing enlightenment programs with collaboration of other organizations concerned on July 29, The conference had the meetings three times so far on July 1, 2010 and July 15, 2011 including set-up meeting. Reduction 生活排水対策の of drain of waste water, 啓発活動の推進 detergent use etc. Reduction 耕地系 of use of chemicals 対策の and fertilizers 推進 目標削減負荷量の達成 Accomplishment of targeted reduction of pollutant load 山林の Proper forests maintenance 適正管理 下水道等の処理施設 Further development of swage の一層の拡充 system The special conference set-up (July 29, 2009) 17 8

9 Enhancing awareness of water improvement and revitalizing local community by kushinsai (spinach or kang kong) cultivation on the reservoir What s kushinsai? It s home is Southeast Asia It s another name is Morning glory It s rich in vitamin and mineral Flower of kushinsai It contains four times more of calcium, five times more of vitamin A and twice more of vitamin C than spinach does. Kushinsai Cross section of the stem 18 Roles of each organization Started from 2004 Agigawa Dam Operation and Maintenance Office Offering boats for activities on the reservoir Providing necessary materials Ena Agricultural High school Monitoring i growth of kushinsai Giving advice on how to grow kushinsai Award for the activities the past December 20, 2007 May 21, 2010 July 1, 2010 January 26,2011 Improvement of water quality in the reservoir Revitalizing local community Taking care of kushinsai Selling kushinsai Ena City Local resident Giving financial and personnel support 19 9

10 Activities last year (2010) Kushinsai planting (June 30) Harvest of kushinsai July 30,August 8 &18, September 17&24, October 1&22 Kushinsai cleared off on November17 Only leaves of kushinsai harvested 20 Record of activities ~ Agigawa Dam Operation and Maintenance Office started kushinsai project with Ena Agricultural High School Agigawa Dam Operation and Maintenance Office called for local residents participation Developed kushinsai project as the joint activity with local community Started selling kushinsai Promoted kushinsai at local events etc. Agigawa Dam Operation and Maintenance Office started growing kushinsai with local residents Continued to sell kushinsai Continued to promote kushinsai at local events etc

11 Network of Asian River Basin Organization was initiated by Asian Development Bank (ADB), ADB Institute (ADBI) and Japan Water Agency (JWA). Formally announced by signing i the LOI on March 21, 2003, during the 3rd World Water Forum at Kyoto-Shiga, Japan. Established on February 24-26, 2004 in Malang, Indonesia Letter of Intent for NARBO The 1 st NARBO General Meeting in 2004 Ownership is the basis of network activity 22 Our Goal To help to achieve IWRM in river basins throughout Asia. Objective To strengthen th the capacity and effectiveness of RBOs in promoting IWRM and improving water governance, through training & exchange of information and experiences among RBOs and their water sector agencies & knowledge partner organizations. Ownership is the basis of network activity 23 11

12 Members from 76 organizations in 16 countries countries organizations 24 Five major activities of NARBO Information Sharing Activity NARBO Web-site & NARBO Newsletter & Annual Report Thematic workshop Thematic Workshop on Water Allocation & Water Rights in Philippines Twining Program IWRM Training Program RBO Performance Benchmarking Twining Program between JWA & Indonesia NARBO 1 st IWRM Training Program in Thailand Benchmarking Workshop in Indonesia 25 12

13 Information Sharing Activity Newsletter Issued 21times Annual Report Issued every year 26 Thematic workshop Total 200 peoples participated. Water Allocation and Water Rights ; 5 times Sustainable Management for Water Resources Infrastructures; 4 times Water-Related Disaster and Its Management ; 2 times IWRM training Six times Training & Around 100 peoples participated 27 13

14 JWA, K-Water, Indonesia NARBO, MASL and Viet Nam NARBO Twining program 30 staff members have been exchanged th General Meeting Date: 8-12 November, 2010 Venue: Makassar, Indonesia Participants: Approx. 100 water professionals from 18 countries 29 14

15 Thank you very much for listening and giving me the opportunity 1 15