Project progress - Dam operation manual -

Transcription

1 Project progress - Dam operation manual - 6 July, 2015 Phạm Xuân Tiến SHIRAKAWA Nobuyuki

2 Expected output on the project Output 4:Structural measures for flood resilience are strengthened in target 4 provinces Activity 4-2:Develop operation manuals for effective use of existing four five (4) (5) major reservoirs in Quang Binh Province. After the basement Kick-off survey point (Dec. (Sep. 2013) 2

3 Background of activity PPC gave the instruction to develop operation manuals for dam reservoirs with gates which have a total volume larger than 1 million m 3. Some earth-fill dams in Quang Binh Province collapsed due to heavy rainfall in There are quite a lot of dams without good maintenance. Sometimes their gates and other facilities can not work well by electrical or mechanical system s problems. Sometimes downstream area was struck by discharge from dam. So citizens request more proper and safety dam operation. 3

4 Location of target dams Not target 4

5 Introduction In Quang Binh Province, there are 6 target dam reservoirs, including Sông Thai that has already developed manual. Côngty Thủy Nông (hereinafter referred to as Provincial Irrigation Company ) manages all of them. At first, we checked the name of target dam reservoirs. And we confirmed Rào Đá was not target dam reservoir, because it has already developed manual that was approved by PPC in Nov Provincial Irrigation Company agreed to cooperate to develop manuals. So we took charge of part of development manuals. Provincial Irrigation Company took charge of Vực Tròn and Phú Vinh, and DIFSC took charge of Phú Hoà and Minh Cầm. 5

6 Location of target dams (Reviewed) Not target Provincial Irrigation Company Provincial Irrigation Company Not target 6

7 General of target dams Name:Minh Cầm Height:13.4m Crest length:190.0m Catchment area:14.00km 2 Total volume:6,850,000m 3 Normal water level:el.19.50m Name:Phú Hòa Height:22.0m Crest length:573.0m Catchment area:12.50km 2 Total volume:9,300,000m 3 Normal water level:el.30.33m 7

8 Minh Cầm There are five slide gates. But they does not have any motors, so we can not operate them easily. (Photo : All gates open) 8

9 Phú Hòa There is wildness in downstream area. (Photo : Downstream area) 9

10 Input 10

11 Study meeting We conducted capacity development assistance for verification of DIFSC, we held study meeting 4 times about the enhancement of dam safety, and we introduced Japanese dam. 11

12 Field study To develop more practical manuals, we went to the target dam sites and other, such as major dam sites or disaster areas in (Photo : Repair work at Vực Tròn) 12

13 Run-off analysis It turn up that there was no hydrological data itself in river basin of Phú Hoà, so Japanese side supported extrapolation method by using adjoining areas data, such as Kien Giang and Cao Khe stations. (Photo : Phú Hoà Reservoir) 13

14 Output 14

15 Achievement Japanese side think we did all necessary support and reached needful outcome. DIFSC has already formulated the manual of Minh Cầm with the technical support of Japanese side and it will be used as a reference. For Phú Hoà, Japanese side supported run-off analysis. The other two manuals of Vực Tròn and Phú Vinh have already formulated by Provincial Irrigation Company and consultant. 15

16 Change of capacity Kick-off point (Sep. 2013) Only few middle-level staff of DIFSC can verify manuals. Present (Jul. 2015) Some junior staff of DIFSC can verify manuals. 16

17 Issues 17

18 Minh Cầm DIFSC thinks the manual is efficient to as a reference. And DIFSC will be able to analyze runoff and reservoir operation by themselves on the basis of past activities such as study meetings or other. 18

19 Example of analysis result of reservoir operation 19

20 Phú Hòa DIFSC has completed the run-off analysis, but DIFSC will analyze reservoir operation and etc. continually. DIFSC will need a support of prescribed certified consultant to complete as a manual that is approved by PPC. 20

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