2021-04-16 Water Situation Weekly Report

On 16 Apr 2021 16/04/64

1

Overview of water situation in Rayong-Chonburi area on 16 Apr 2021 1 P2

ชลบุร ี

Reservoir capacity (MCM)

Current storage volume (MCM) Percentage of reservoir capacity Useable storage volume Samnakbok (excluding Dead Storage) Reserve Pond (MCM) 15.53

P3 P4

Private Pond

ระยอง

P1

บางพระ

หนองค้อ

ดอกกราย

หนองปลา ไหล

คลอง ใหญ่

ประแสร์

117.00

21.40

79.41

163.75

40.10

295.00

51.58

11.46

42.73

121.67

9.77

171.01

44%

54%

60%

74%

24%

58%

39.53

10.46

39.73

108.17

6.77

151.01

-

-

0.967

0.884

0.078

-0.35

+0.17

P5

Inflow into reservoir (MCM) (On 15 Apr 21)

51.58

Bang Phra res.

P6

11.46

Nong Kho res.

P7

71.61

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

34.84

42.73

+0.16

+4.74

63.04 MCM (45.5%)

174.17 MCM (63.28%)

Dok Krai res.

P8

P12

P9

P

P15

P10

XX XX

P13

Ref: Royal Irrigation Department

-3.45

171.01

XX 195.81

-0.49

Prasae res.

Khlong Yai res.

Nong Pla Lai res.

P11

+5.07

-0.18

9.77

121.67

-

1.928

Raw Water Pipe Line (EW) P14

Existing Pipe Network Constructing Pipe Network

Demand 2564 (MCM.) Supply (MCM.) Pump Station 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 Maximum 2006-2020

2004

2005

2015

2016

2017

2018

2019

2020

Capacity

Dead storage

URC - RID

LRC - RID

Average 2006-2020

2021

170 160 Maximum 2006-2020 Average 2006-2020 150 140 2 Reservoirs total capacity 138.4 MCM. 130 120 110 100 90 80 70 60 50 40 30 20 Minimum reservoir volume 13.05 MCM. 10 0 16/04/64 160

URC - RID

16 Apr 2021 63.04 MCM. 45.55 %

140

120

100

80

60

40

20

0

Jan

Feb

Mar

Apr

LRC - RID

May

Jun

Jul

Aug

Sep

Oct

Nov

3 Dec

Water situation of Bangphra Reservoir (by Year)

Water volume in Bangphra Reservoir (MCM.)

Water Situation of Bangphra Reservoir

150

140

2004

2005

2006

2011

2015

2016

2018

2019

2020

Capacity

Dead storage

URC - RID

LRC - RID

Average 2006-2020

2021

URC - RID

16 Apr 2021 51.58 MCM. 44.09 %

140

Average 2006-2020

130 120

120

Reservoir Capacity

MCM.

110 100

100

90 80

80

70 60

60

50 40

40

30 20

20

10 0

Minimum reservoir volume

.05 MCM.

LRC - RID

0

16/04/64

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

4 Dec

Water situation of Nongkho Reservoir (by Year)

Water volume in Nongkho Reservoir (MCM.)

Water Situation of Nongkho Reservoir

26

2004

2005

2011

2015

2016

2018

2019

2020

Capacity

Dead storage

Normal useable volume

URC - RID

LRC - RID

Average 2006-2020

2021

25

24

Average 2006-2020

22 20

Reservoir Capacity

URC - RID

16 Apr 2021 11.46 MCM. 53.55 %

.4 MCM.

20

18

16 15

14

12 10

10

8 6 5

4 Normal useable volume MCM. Minimum reservoir volume MCM.

2 0

0

16/04/64

Jan

Feb

Mar

LRC - RID

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

5 Dec

Water situation of Nongplalai, Dokkrai and Klongyai Reservoirs Water volume in Dokkrai Nongplalai and Klongyai Reservoirs (MCM.)

Water Situation of Dokkrai Nongplalai and Klongyai Reservoirs

380 360 340 320 300 280 260 240 220 200 180 160 140 120 100 80 60 40 20 0

Maximum 2006-2020 2015 2019 Dead storage Average 2006-2020

2004 2016 2020 Increased Capacity 2021

2014 2018 Minimum volume LRC - RID

URC - RID

16 Apr 2021 174.17 MCM. 63.28 %

Maximum 2006-2020 Average 2006-2020

350

2005 2017 Capacity URC - RID

Increased reservoir capacity (temporary) 318.13 MCM. 300

3 reservoirs total capacity

.25 MCM.

250

200

150

100

50

Minimum reservoir volume Dead storage 0

1

31

Jan

.5 MCM. 1

Feb

MCM. LRC - RID

31

Mar

30

Apr

30

May

29

Jun

29

Jul

28

Aug

27

Sep

27

Oct

26

Nov

26

Dec

Water situation of Dokkrai Reservoir (by Year) Water Situation of Dokkrai Reservoir 2004 2014 2018 Dead storage Average 2006-2020

100

Water volume in Dokkrai Reservoir (MCM.)

100

90

90

80

80

2005 2015 2019 Increased Capacity 2021

Average 2006-2020

2006 2016 2020 URC - RID

2011 2017 Capacity LRC - RID

URC - RID

16 Apr 2021 42.729 MCM. 59.84 %

Increased reservoir capacity (temporary) 79.41 MCM.

Reservoir Capacity 71.4 MCM.

70

70

60

60

50

50

40

40

30

30

20

20

10

10

Minimum reservoir volume

0

0

16/04/64

Jan

Feb

Mar

MCM.

Apr

LRC- RID

May

Jun

Jul

Aug

Sep

Oct

Nov

7 Dec

Water situation of Nongplalai Reservoir (by Year)

Water volume in Nongplalai Reservoir (MCM.)

Water Situation of Nongplalai Reservoir 2004 2014 2018 Dead storage Average 2006-2020

220

200

2005 2015 2019 Increased Capacity 2021

2011 2017 Capacity LRC - RID

URC - RID

16 Apr 2021 121.669 MCM. 74.3 %

Average 2006-2020

200

2006 2016 2020 URC - RID

Increased reservoir capacity (temporary) 187.62 MCM.

180

Reservoir Capacity

.75 MCM.

160 150

140 120 100

100

80

60 50

40 20

0

Minimum reservoir volume

.5 MCM. LRC - RID

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Water situation of Klongyai Reservoir (by Year)

Water volume in Klongyai Reservoir (MCM.)

Water Situation of Klongyai Reservoir 2006 2016 2020 Lowest of tunnel 2021

55

50

Increased reservoir capacity (temporary) Reservoir Capacity

2014 2018 Dead storage LRC - RID

2015 2019 Increased Capacity Average 2006-2020

URC - RID

16 Apr 2021 9.772 MCM. 24.37 %

Average 2006-2020

50

45 40

2011 2017 Capacity URC - RID

.465 MCM.

.1 MCM.

40

35 30

30

25 20

20

Lowest water level that can be transferred through tunnel to Nongplalai Reservoir

15 10

.2 MCM.

Minimum reservoir volume .5 MCM.

10

5

0

LRC - RID 0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Water situation of Prasae Reservoir

Water volume in Prasae Reservoir (MCM.)

Water Situation of Prasae Reservoir

360 340 320 300 280 260 240 220 200 180 160 140 120 100 80 60 40 20 0

Maximum 2006-2020

2005

2006

2015

2016

2017

2019

2020

Capacity

Dead storage

URC - RID

LRC - RID

Average 2006-2020

2021

350

Maximum 2006-2020 Average 2006-2020

300

Reservoir Capacity

URC - RID

16 Apr 2021 171.01 MCM. 57.97 %

MCM.

250

200

150

100

50

Minimum reservoir volume

MCM. LRC - RID

0

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Summary of water shortage prevention and mitigation measures in Rayong and Chonburi Provinces 2021 Planned Water Volume (MCM) 2021

Measure JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

8.0

8.0

8.0

8.0

8.0

4.00

4.00

4.00

4.00

SEP

OCT

NOV

DEC

Total

1. Primary measures

1.1Water diversion via pumping from Prasae Reservoir PS: 1. Plans for pumping water from the Prasae reservoir will adjust according to the water situation 2. Prasae – Nong Pla Lai start divert from 5 Jan 2021. Supply water to the community along the pipe.

1.2 Divert Water from Bangpakong River + Private Pond

Planned PS - KY Planned PS- NPL Actual PS-KY Actual PS-NPL

Planned Private Pond

-

3.00

3.00

4.00

-

-

-

1.86

1.68

1.86

Actual 1.3 Divert Water from Klong Pra Ong Chaiyanuchit

Planned Actual

0.00 12.81

0.35

Planned

Bangpakong

30.00

4.00

15 Apr 0.45 3.05 6.20 3.11

5.75

6.80

Bangpakong

Actual Private Pond

40.00

15 Apr 1.53 1.24 1.14 0.52

7.80

7.40

22.00

4.43

Target Line and Reservoir Simulation in Chonburi

Storage Volume 138.40 MCM

Normal Status (All Clear) 155 130

155

Prepare water reserve • •

Surveillance of water scarcity

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)

•

Water shortage warning Minimum storage volume15.05 MCM.

On 16 Apr 2021 Water Volume 97.38 MCM

• •

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

Target Line and Reservoir Simulation in Rayong

On 16 Apr 2021 Water Volume 174.17 MCM or 63.28%

Storage Volume 138.40 MCM

Normal Status (All Clear)

220 170

• •

230

220

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)

Surveillance of water scarcity •

Water shortage warning

• •

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. 16/04/64

13

Target Line and Reservoir Simulation in Prasae

On 16 Apr 2021 Water Volume 171.01 MCM or 57.97%

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

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

THANK YOU