water situation

Summary of the water volume and mitigation measures in Rayong and Chonburi Provinces for 2023 On 15th December 2023 18/12/66

1

Overview of water situation in Rayong-Chonburi area on 15th Dec 2023 P2

P3 P4

Private Pond

Chonburi

Detail

P1

Reservoir capacity (MCM) (Temporary increase) Current storage volume 17.00 (MCM) on 15 Dec 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)

87.74

9.39

59.03

160.90

29.64

259.90

75%

44%

83%

98%

74%

88.1%

75.69

8.39

56.03

147.40

26.64

239.90

0.240

0.028

0.328

Inflow into reservoir (MCM) (On 14 Dec 2023)

87.74

Bang Phra res.

P6

9.39

Nong Kho res.

P7

48.00

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

38.00

+0.29

29.64

Dok Krai res. P12

P8

P11

P9

Prasae

0.00

0.596 -0.50

-0.50

-0.88

-1.55 -4.78

-0.21

-2.93

97.13 MCM (70.20%)

249.57 MCM (90.67%)

Ref: water situation from RID on 15 Dec 2023

259.90 Prasae res.

Khlong Yai res.

Nong Pla160.90 Lai res.

59.03

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

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 Water volume in Bangphra and Nongkho Reservoirs (MCM.)

Water Situation of Bangphra and Nongkho Reservoirs

170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0

Maximum 2006-2022 2016 2020 URC - RID 2022

2004 2017 2021 LRC - RID

2015 2019 Dead storage 2023

15 Dec 2023 97.13 MCM. 70.18 %

Maximum 2006-2022

160

2005 2018 Capacity Average 2006-2022

140

2 Reservoirs total capacity 138.4 MCM.

120

2022

URC - RID

Average 2006-2022

2023

100

1

80

60

40

20

LRC - RID

Minimum reservoir volume 13.05 MCM. 0

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Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec 3

Water situation of Bangphra Reservoir (by Year)

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4

Water situation of Nongkho Reservoir (by Year)

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5

Water situation of Nongplalai, Dokkrai and Klongyai Reservoirs

Water situation of Dokkrai Reservoir (by Year)

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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

8.06

54.00

0.25

0.25

0.25

0.25

5.00

7.50

6.88

29.68

7.06 2.92 8.82 6.62 3.95 8.48 9.03 8.92 8.09 8.91

8.37

1. Primary measures

1.1Water diversion via pumping from Prasae Reservoir

Planned PS - KY Planned PS- NPL

PS. Divert water to irrigation area during Feb until May 2023

PS-KY*

1.2 Divert Water from Bangpakong River + Private Pond Ps. Stop divert water from Bang Prakong River to Bang Phra reservoir because the salinity over then 1 g/l

1.55

1.40

3.10

3.00

0.25

14 Dec

0.39 0.39 1.40 1.42 0.33 0.35 0.38 0.33 0.39 5.60

Planned Private Pond

1.83

1.60

1.92

0.74

1.74

1.19

Planned

6.87

Bangpakong

0.84

6.99

7.49

2.69

19.10

0.89

10.95

3.81

25.16

2 Aug

1.17 1.88 1.17 2.62 2.62 1.60 0.03

11.93 28 Nov 5.79

28.46

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 13.73 7.48

6.51

Bangpakong

Planned 1.3 Klong Saphan reverse KlongSaphan

Actual KlongSaphan

1.4 Divert Water from Klong Pra Ong Chaiyanuchit

5.43

1.04

Actual

pumping station

85.80

14 Dec

Actual PS-NPL

Actual Private Pond

4.63

0.51

0.48

1.61

0.00

7.80

2.47

8.36

14 Dec

65.75

Target Line and Reservoir Simulation in Chonburi

On 15 Dec 2023 Water Volume 121.56 MCM

155

Normal Status (All Clear) Prepare water reserve 130 Surveillance of water scarcity

155 •

•

•

Water shortage warning Minimum storage volume15.05 MCM.

• •

Normal Status (All Clear) Prepare water reserve 130

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.

On 15 Dec 2023 Water Volume 249.57 MCM or 90.68%

(Temporary capacity 78.45%)

Normal Status (All Clear)

Normal Status (All Clear)

230 Prepare water reserve

220 170

• •

Surveillance of water scarcity •

Water shortage warning

• •

220 170

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. 18/12/66

13

Target Line and Reservoir Simulation in Prasae

On 15 Dec 2023 Water Volume 259.90 MCM or 88.10%

Storage Volume 295.0 MCM

250

Normal Status (All Clear) 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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