water situation

Summary of the water volume and mitigation measures in Rayong and Chonburi Provinces for 2023 On 3rd November 2023 06/11/66

1

Overview of water situation in Rayong-Chonburi area on 3rd Nov 2023 P2

P3 P4

Private Pond

Chonburi

Detail

P1

Reservoir capacity (MCM) (Temporary increase) Current storage volume 17.00 (MCM) on 3 Nov 2023 Percentage of reservoir capacity Samnakbok Useable storage volume Reserve Pond (excluding Dead Storage) (MCM) P5

BangPhra

Nong Kho

Dokkrai

Nong Pla Lai

Klong Yai

117.00

21.40

71.40 (79.41)

163.75 (187.62)

40.10 295.00 (51.10)

77.30

10.70

52.75

151.70

28.92

282.87

66%

50%

74%

93%

72%

95.9%

65.25

9.70

49.75

138.20

25.92

262.87

0.297

0.438

0.044

Inflow into reservoir (MCM) (On 2 Nov 2023)

77.30

Bang Phra res.

P6

10.70

Nong Kho res.

P7

48.00

+3.95

28.92

Dok Krai res. P12

+3.92

P8

P11

P9

+7.88

-

-1.63 -2.99

+3.43

+10.17

84.56 MCM (61.1%)

223.2 MCM (81.09%)

Ref: water situation from RID on 3 Nov 2023

282.87 Prasae res.

P

P15

P10

Normal 50.01-80.00% Emergency 30.01-50.00%

Critical <30.00% XX Demand 2023 (MCM.)

XX XX

P13

156.60

-0.52

Khlong Yai res.

Nong Pla151.70 Lai res.

52.75

Prasae

0.867

Water volume compared to previous week (-decrease, +increase) (MCM) Total water volume in each area

38.00

Rayong

Supply (MCM.) Pump Station

Raw Water Pipe Line (EW) P14

Existing Pipe Network Constructing Pipe Network

Raw Water Pipe Line (RID) Existing Pipe Network Constructing Pipe Network

Water situation of Bangphra, Nongkho Reservoir

06/11/66

3

Water situation of Bangphra Reservoir (by Year)

06/11/66

4

Water situation of Nongkho Reservoir (by Year)

06/11/66

5

Water situation of Nongplalai, Dokkrai and Klongyai Reservoirs

Water situation of Dokkrai Reservoir (by Year)

06/11/66

7

Water situation of Nongplalai Reservoir (by Year)

Water situation of Klongyai Reservoir (by Year)

Water situation of Prasae Reservoir

Summary of water shortage prevention and mitigation measures in Rayong and Chonburi Provinces 2023 Planned Water Volume (MCM) 2023

Measure JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

Total

7.50

7.80

7.80

7.80

7.80

7.80

7.50

54.00

0.25

0.25

0.25

0.25

0.25

0.25

0.25

27.95

7.06 2.92 8.82 6.62 3.95 8.48 9.03 8.92 8.09 8.91

3 Nov 0.91

73.71

3 Nov 5.60 0.63

11.61

1. Primary measures

1.1Water diversion via pumping from Prasae Reservoir * Divert water to irrigation

area during Feb until May 2023

1.2 Divert Water from Bangpakong River + Private Pond

Planned PS - KY Planned PS- NPL PS-KY*

1.55

1.40

3.10

3.00

0.25

Actual PS-NPL

0.39 0.39 1.40 1.42 0.33 0.35 0.38 0.33 0.39

Planned Private Pond

1.83

1.60

1.92

0.74

1.74

1.19

1.04

Planned

6.87

Bangpakong

Actual Private Pond

0.84

7.49

3.81

2 Aug

10.95 25.16

11.93 3 Nov 1.64

24.31

5.00 10.00 10.00 14.00 11.00

50.00

10 Oct 2.87 0.00

7.94

Planned

14.00 14.00 14.00 14.00

56.00

Actual

5.17 15.37 11.57 12.43 1.64

6.51

Bangpakong

Planned 1.3 Klong Saphan reverse KlongSaphan

Actual KlongSaphan

1.4 Divert Water from Klong Pra Ong Chaiyanuchit

6.99

1.17 1.88 1.17 2.62 2.62 1.60 0.03

Actual

pumping station

0.89

0.51

0.48

1.61

0.00

7.80

2.47

8.36

3 Nov

46.18

Target Line and Reservoir Simulation in Chonburi

On 3 Nov 2023 Water Volume 109.38 MCM

155

Normal Status (All Clear) Prepare water reserve 130

155

•

•

Water shortage warning Minimum storage volume15.05 MCM.

Prepare water reserve 130

•

Surveillance of water scarcity

Normal Status (All Clear)

• •

Divert water from Bang Pa Kong River and Pra Ong Chaiyanuchit (diversion will according to the water situation) Increase water diversion from Rayong (diversion will according to the water situation)

Divert Water from Khlong Luang Ratchalothorn reservoir (diversion will according to the water situation) Consideration for another private pond Reduce water usage for various activities

155

Target Line and Reservoir Simulation in Rayong

Increase reservoir capacity for temporary 318.13 MCM.

Normal Status (All Clear)

On 3 Nov 2023 Water Volume 231.38 MCM or 84.06%

230 Prepare water reserve

220 170

Normal Status (All Clear) 220 170

• •

Surveillance of water scarcity •

Water shortage warning

(Temporary capacity 72.73%)

• •

Divert water from Prasae reservoir via Prasae-Klong Yai pipeline and PrasaeNong Pla Lai pipeline (diversion will according to the water situation) Divert water from Wat La Harn Rai to Nong Pla Lai reservoir (diversion will according to the water situation) Divert water from Prasae reservoir via Prasae-Klong Yai pipeline and Prasae-Nong Pla Lai pipeline (Full efficiency) Divert water from Wat La Harn Rai to Nong Pla Lai reservoir (Full efficiency) Reduce water consumption for all activities

Minimum storage volume 31.70 MCM. 06/11/66

13

Target Line and Reservoir Simulation in Prasae

On 3 Nov 2023 Water Volume 282.37 MCM or 95.72%

Storage Volume 295.0 MCM

Normal Status (All Clear) 250 Prepare water reserve

• •

Surveillance of water scarcity

Water shortage warning Minimum storage volume 20.0 MCM.

•

250

Normal Status (All Clear) Prepare water reserve

Divert water from Khlong Saphan canal to Prasae reservoir (diversion will according to the water situation) Divert water from Wang Ta Nod canal to Prasae reservoir (diversion will according to the water situation) decrease divert water from Prasae reservoir (diversion will according to the water situation)

• Reduce water consumption for all activities

250

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