development of a computerised flood warning model and ... 15 technical... · rufiji environment...

47
Rufiji Environment Management Project 1 Environmental Management and Biodiversity Conservation of Forests, Woodlands, and Wetlands of the Rufiji Delta and Floodplain Development of a Computerised Flood Warning Model and Study of Hydrological Characteristics of the Lower Rufiji Floodplain and Delta Technical Report No. 14 Vol. 2: Appendices March 2003 For more information please contact: Project Manager, Rufiji Environment Management Project P O Box 13513 Dar es Salaam, Tanzania. Tel: 44 Utete Rufiji or 2666088 / 0741 322366 Dar es Salaam Email: [email protected] or [email protected] 1 The Rufiji District Council implements Rufiji Environment Management Project with technical assistance from IUCN – The World Conservation Union, and funding from the Royal Netherlands Embassy.

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Page 1: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

Rufiji Environment Management Project1

Environmental Management and Biodiversity Conservation of Forests,

Woodlands, and Wetlands of the Rufiji Delta and Floodplain

Development of a Computerised Flood Warning

Model and Study of Hydrological Characteristics

of the Lower Rufiji Floodplain and Delta

Technical Report No. 14 Vol. 2: Appendices

University of Dar es Salaam

Water Resources

Engineering Department

Water Resources

Engineering Programme

March 2003

For more information please contact:

Project Manager,

Rufiji Environment Management Project

P O Box 13513

Dar es Salaam, Tanzania.

Tel: 44 Utete Rufiji or 2666088 / 0741 322366 Dar es Salaam

Email: [email protected] or [email protected]

1 The Rufiji District Council implements Rufiji Environment Management Project with technical assistance from IUCN – The World

Conservation Union, and funding from the Royal Netherlands Embassy.

Page 2: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

Project Goal: To promote the long-term conservation through ‘wise use’ of the lower Rufiji

forests, woodlands and wetlands, such that biodiversity is conserved, critical ecological

functions are maintained, renewable natural resources are used sustainably and the livelihoods

of the area’s inhabitants are secured and enhanced.

Objectives

To promote the integration of environmental conservation and sustainable development

through environmental planning within the Rufiji Delta and Floodplain.

To promote the sustainable use of natural resources and enhance the livelihoods of

local communities by implementing sustainable pilot development activities based on

wise use principles.

To promote awareness of the values of forests, woodlands and wetlands and the

importance of wise use at village, district, regional and central government levels, and

to influence national policies on natural resource management.

Project Area

The project area is within Rufiji District in the ecosystems affected by the flooding of the river

(floodplain and delta), downstream of the Selous Game Reserve and also including several

upland forests of special importance.

Project Implementation

The project is run from the district Headquarters in Utete by the Rufiji District Administration

through a district Environmental Management Team coordinated by the District Executive

Director. The Project Manager is employed by the project and two Technical Advisers are

employed by IUCN.

Project partners, particularly NEMC, the Coast Region, RUBADA, The Royal Netherlands

Embassy and the Ministry of Natural Resources and Tourism, collaborate formally through

their participation in the Project Steering Committee and also informally.

Project Outputs

At the end of the first five –year phase (1998-2003) of the project the expected outputs are:

An Environmental Management Plan: an integrated plan for the management of the

ecosystems (forests, woodlands and wetlands) and natural resources of the project area that

has been tested and revised so that it can be assured of success - especially through

development hand-in-hand with the District council and the people of Rufiji.

Village (or community) Natural Resource Management Plans: These will be produced in pilot

villages to facilitate village planning for natural resource management. The project will

support the implementation of these plans by researching the legislation, providing training

and some support for zoning, mapping and gazettement of reserves.

Established Wise Use Activities: These will consist of the successful sustainable development

activities that are being tried and tested with pilot village and communities and are shown to

be sustainable

Key forests will be conserved: Forests in Rufiji District that have shown high levels of plant

biodiversity, endemism or other valuable biodiversity characteristics will be conserved by

gazettement, forest management for conservation, and /or awareness-raising with their

traditional owners.

Rufiji Environment Management Project – REMP

Page 3: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

REMP Technical Report 14 Vol. 2: Appendices

List of Appendices Appendix A2.1: List of Available Rainfall Stations for the Rufiji River Basin in WREP database ............. 1

Appendix A2.2: List of Rainfall Stations that Contribute to Catchments within the Kilombero Sub-Basin

in Estimating Average Rainfall using Thiessen Polygon Method................................................................. 7

Appendix A2.3: Monthly Correlation Results Among Rainfall Stations ...................................................... 9

Appendix A2.4: Listing of the time of the Onset and Cessation; Average Duration and Magnitude of

rainfall at each rain gauge station................................................................................................................ 11

Appendix A4.1: Flow gauging stations in the Rufiji River Basin in WREP database ................................ 15

Appendix A4.2: Graphs of Rating Curves for all the flow gauging Stations used in this Study................. 17

Appendix A4.3: Rating Curves at Mloka (1k4) and their Respective Error Diagrams ............................... 36

Appendix A4.4: Rating Curves at Mloka (1k4) in comparison with Recent Spot Measurements .............. 42

Appendix A6.1: List of 2 m Interval Contours Maps of Rufiji Floodplain from RUBADA ...................... 44

Appendix A7.1: Scatter Plots for Observed against Estimated Flows ........................................................ 45

Appendix A7.4: Seasonal Hydrological Diagrams for Sub-Catchments in the Kilombero Sub-Basin....... 80

Appendix A7.5: Optimal Parameters attained using HEC-HMS to model the Kilombero Sub-Basin........ 86

i

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2.5

5

15

50

99

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4.8

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22

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60

99

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30

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51

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3

15

70

99

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33

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98

15

5.0

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15

80

99

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00

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35

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00

1/1

94

01

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98

24

31

4.9

2

15

90

99

35

00

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IFA

NY

AM

ISS

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35

.13

3-9

.51

70

1/1

94

01

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85

92

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1

16

00

99

35

00

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3-9

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30

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11

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99

75

71

5.3

8

16

10

99

35

00

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35

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0-9

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00

1/1

94

11

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99

05

01

8.8

4

16

20

99

35

00

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35

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70

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41

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12

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30

99

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50

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33

01

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60

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2

6

Page 10: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

REMP Technical Report 14 Vol. 2: Appendices

Appendix A2.2: List of Rainfall Stations that Contribute to Catchments within the

Kilombero Sub-Basin in Estimating Average Rainfall using Thiessen Polygon Method

Catchment with its delineated

area

Rainfall Stations Contributing

to Catchment

Thiessen Polygon Weight to

the Catchment

09835005 0.027003

09835009 0.019023

09835019 0.126953

09835021 0.005444

09835022 0.011033

09835023 0.363688

09835026 0.029402

09835030 0.017883

09835034 0.061763

09835041 0.027003

09835043 0.027003

09835044 0.045092

09835047 0.103657

1kb8

(2,733 km2)

14 Rainfall Stations

09935007 0.131253

09836004 0.035455

09836006 0.110876

09934001 0.018630

09934013 0.004395

09934015 0.004395

09934018 0.022245

09934019 0.009436

09934020 0.007779

09934022 0.003235

09934023 0.004395

09934024 0.004395

09934025 0.004395

09934027 0.004395

09934032 0.004395

09934038 0.011112

09934039 0.001016

09935002 0.183944

09935003 0.038488

09935004 0.046207

09935005 0.031972

09935006 0.183944

09935007 0.042343

09935012 0.038488

1kb10

(11,094 km2)

24 Rainfall Stations

09935014 0.183944

09834001 0.044862

09834005 0.073526

09835007 0.044288

09835021 0.006664

09835022 0.007797

09835024 0.022696

09835025 0.147636

09835034 0.006536

Intervening Catchment of 1kb4

excluding 1kb8 and 1kb10

(6,153 km2)

18 Rainfall Stations

09835036 0.000795

7

Page 11: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

REMP Technical Report 14 Vol. 2: Appendices

Catchment with its delineated

area

Rainfall Stations Contributing

to Catchment

Thiessen Polygon Weight to

the Catchment

09836006 0.080956

09934021 0.021462

09934034 0.037649

09934038 0.007376

09934039 0.000957

09935004 0.047132

09935005 0.015173

09935007 0.280441

Intervening Catchment of 1kb4

continues

09935009 0.151520

1kb15 (330 km2) 09835050 1.000000

09736004 0.220623

09736016 0.2206231kb14a (597 km2)

09836000 0.555424

09835005 0.001341

09835023 0.029989

09835041 0.001341

09835043 0.001341

09835047 0.100027

09835050 0.122651

09836000 0.186408

09836001 0.004271

09836002 0.104251

09836003 0.014036

09836004 0.122953

09836006 0.133446

09836011 0.174417

Intervening Catchment of 1kb17

excluding 1kb4, 1kb14a and

1kb15

(11,289 km2)

14 Rainfall Stations

09935007 0.002656

8

Page 12: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

RE

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Tec

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0.6

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0.6

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0.6

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0.8

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0.8

71

0.9

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0.8

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09

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15

0.7

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.73

0.9

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0.9

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0.9

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0.7

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.84

0.8

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0.7

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0.8

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.67

0.8

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09

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0.9

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0.9

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0.9

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0.8

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09

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0.8

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0.9

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0.9

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0.8

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0.6

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0.9

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0.8

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0.7

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0.9

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0.8

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0.6

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0.7

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09

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0.8

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0.6

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0.4

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39

0.8

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0.8

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0.8

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0.5

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09

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0.8

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0.8

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0.8

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0.6

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0.7

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0.7

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0.8

9

09

93

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0.6

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0.6

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0.7

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0.6

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0.7

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0.5

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0.5

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0.6

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0.7

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09

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50

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0.8

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0.8

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0.8

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0.8

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0.7

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0.8

6-9

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0.7

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0.8

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0.8

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0.9

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09

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0.8

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0.8

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0.7

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0.7

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-9.9

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0.7

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0.7

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0.8

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0.8

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0.8

51

No

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-9.9

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9

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Inte

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09

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10

Page 14: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

REMP Technical Report 14 Vol. 2: Appendices

Appendix A2.4: Listing of the time of the Onset and Cessation; Average Duration and

Magnitude of rainfall at each rain gauge station

No. Station Onset Cessation Duration

Long

Rains

(mm)

Mean Annual

Rainfall

(mm)

1 09536004 32 12 17 546.97 580.39

2 09536017 32 12 17 529.21 573.63

3 09635001 33 11 15 526.14 566.35

4 09635010 33 12 16 518.32 559.06

5 09635011 33 11 15 573.97 630.01

6 09635012 33 11 15 506.99 545.02

7 09635014 33 11 15 502.66 537.33

8 09635026 31 11 17 611.63 632.80

9 09636000 34 13 16 619.74 691.10

10 09636006 33 14 18 694.25 763.33

11 09636008 33 12 16 632.93 705.14

12 09636013 33 12 16 564.51 593.75

13 09636018 30 15 22 1364.73 1634.72

14 09636020 33 11 15 482.54 529.96

15 09636026 33 15 19 526.40 581.42

16 09636027 32 15 20 1178.65 1357.06

17 09636029 34 12 15 418.73 477.39

18 09733000 33 12 16 875.15 957.34

19 09733002 32 11 16 883.09 950.00

20 09734000 33 12 16 602.50 665.60

21 09734001 33 11 15 528.52 583.92

22 09735002 33 12 16 589.11 648.21

23 09735003 33 12 16 594.13 656.50

24 09735004 32 12 17 377.49 397.48

25 09735007 33 12 16 672.12 737.71

26 09735008 33 12 16 572.93 620.34

27 09735013 33 12 16 576.01 621.09

28 09735014 33 12 16 666.15 732.16

29 09735015 32 12 17 704.58 745.25

30 09736003 33 12 16 558.91 628.05

31 09736004 36 15 16 1357.87 1768.15

32 09736006 33 12 16 347.78 402.05

33 09736007 30 13 20 909.49 1021.35

34 09736008 32 13 18 909.76 1062.71

35 09736012 34 11 14 540.93 656.44

36 09736016 32 14 19 1244.97 1405.52

37 09736017 33 11 15 747.03 795.49

38 09737000 31 14 20 974.41 1125.40

39 09737005 33 15 19 1340.36 1608.87

11

Page 15: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

REMP Technical Report 14 Vol. 2: Appendices

No. Station Onset Cessation Duration

Long

Rains

(mm)

Mean Annual

Rainfall

(mm)

40 09737006 31 15 21 1545.41 1937.16

41 09737008 34 14 17 799.42 968.90

42 09737011 32 14 19 1157.52 1309.49

43 09737013 31 15 21 2223.65 2480.36

44 09737014 32 13 18 951.06 1230.99

45 09738000 26 8 19 737.02 830.25

46 09738004 32 13 18 884.85 1051.64

47 09738018 30 15 22 735.16 820.83

48 09833000 32 12 17 537.33 584.49

49 09833001 32 12 17 871.76 938.72

50 09833002 33 10 14 781.45 866.68

51 09833003 34 12 15 965.74 1103.07

52 09833010 33 13 17 1864.46 2073.70

53 09833015 33 12 16 1152.13 1271.58

54 09833020 33 12 16 862.03 964.22

55 09833025 33 13 17 942.42 1046.10

56 09834000 33 12 16 648.79 724.81

57 09834001 32 10 15 733.98 805.31

58 09834002 34 11 14 722.24 825.86

59 09834003 33 11 15 579.27 622.87

60 09834004 34 10 13 616.73 695.34

61 09834005 34 12 15 759.79 832.23

62 09834006 33 11 15 675.93 730.98

63 09834008 33 11 15 585.29 634.10

64 09834010 33 11 15 719.63 793.17

65 09834011 33 11 15 668.37 720.63

66 09834012 33 10 14 584.44 658.52

67 09834013 33 12 16 887.70 1036.06

68 09834016 32 10 15 459.81 489.94

69 09834018 33 13 17 463.36 502.13

70 09835002 32 12 17 785.93 842.70

71 09835005 33 13 17 984.36 1082.15

72 09835007 34 14 17 1655.16 1892.03

73 09835009 33 14 18 1254.68 1421.49

74 09835010 32 10 15 710.58 787.49

75 09835011 32 11 16 891.20 987.10

76 09835013 33 12 16 981.84 1134.61

77 09835015 33 13 17 622.95 687.33

78 09835016 33 10 14 614.72 711.85

79 09835017 33 12 16 881.24 965.54

80 09835019 33 13 17 1151.64 1293.78

12

Page 16: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

REMP Technical Report 14 Vol. 2: Appendices

No. Station Onset Cessation Duration

Long

Rains

(mm)

Mean Annual

Rainfall

(mm)

81 09835021 17 1240.04

82 09835022 18 2238.13

83 09835023 17 1484.62

84 09835024 19 1537.64

85 09835025

34 14 1461.17

34 15 2634.58

34 14 1730.71

32 14 1711.64

32 14 19 2669.03 2942.55

86 09835026 33 13 17 1088.29 1223.43

87 09835027 35 13 15 641.23 706.88

88 34 13 16 912.17 1045.48

89 09835033 32 11 16 876.75 954.09

90 09835034 33 15 19 1190.70 1331.88

91 09835036 32 17 846.46 905.33

92 09835039 32 12 17 806.57 852.46

93 09835040 33 11 15 733.39 828.70

94 09835042 32 13 18 826.52

95 09835043 34 13 16 816.70 933.56

96 09835044 32 11 16 1236.42 1339.25

97 09835047 31 15 21 1135.71 1240.09

98 09835050 32 14 19 1216.26 1350.81

99 09835053 32 11 16 703.58 779.89

100 09836000 34 14 17 1173.50 1333.09

101 33 13 17 1695.33 1960.22

102 09836002 33 13 17 1556.76 1828.05

103 09836003 33 13 17 1113.82 1258.66

104 09836004 34 16 1061.98 1212.05

105 09836006 30 12 19 784.25 1048.25

106 09836011 32 13 18 1145.77 1254.73

107 09838002 31 14 20 875.93

108 09839004 32 14 19 889.43 1007.17

109 09933000 32 15 20 1996.28 2395.46

110 09933002 32 15 20 2025.98 2432.94

111 09933004 32 14 19 1727.29 2071.94

112 09933005 32 15 20 1927.05 2290.15

113 09933007 32 15 20 1969.24 2394.25

114 33 15 19 2317.94 2721.91

115 09933011 32 15 20 2117.75 2419.79

116 09933013 32 15 20 1661.13 1916.54

117 09933020 35 17 1686.80 2144.10

118 09933022 33 13 17 604.03 753.64

119 09933023 34 13 16 2031.10 2546.19

120 09933024 32 14 19 1885.57

121 09933025 32 15 20 1352.38 1556.35

09835030

12

744.24

09836001

13

779.14

09933010

15

1588.27

13

Page 17: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

REMP Technical Report 14 Vol. 2: Appendices

No. Onset Cessation

Mean Annual

Rainfall

(mm)

Long

Rains

(mm)Station Duration

122 09933028 31 15 21 989.33 1145.87

123 09933029 32 15 20 1898.48 2166.18

124 09933031 33 12 16 912.30 1017.43

125 09933033 30 12 19 2017.47 2254.95

126 09934000 32 13 18 2457.91 2662.70

127 09934001 33 12 16 980.84 1078.92

128 09934008 33 12 16 1544.86 1766.58

129 09934009 33 13 17 725.89 815.69

130 09934010 33 13 17 1055.27 1159.06

131 09934011 31 13 19 1471.86 1586.87

132 09934013 33 12 16 1121.94 1275.30

133 09934015 32 12 17 1079.93 1170.14

134 09934018 32 13 18 1050.91 1132.30

135 09934019 32 12 17 943.25 1027.20

136 09934020 32 12 17 911.45 988.43

137 09934021 32 12 17 1004.33 1078.66

138 09934022 11 15 912.98 1026.54

139 09934023 32 13 18 2080.96 2281.33

140 09934024 32 12 17 1239.09 1355.49

141 09934025 33 12 16 1965.20 2160.26

142 09934026 33 13 17 1255.29 1399.32

143 09934027 32 13 18 1248.28 1360.11

144 09934029 34 13 16 2053.69 2294.47

145 09934032 32 11 16 938.29 1051.36

146 09934034 34 13 16 772.66 911.75

147 09934038 33 12 16 914.17 1013.36

148 09934039 32 12 17 920.82 992.37

149 09934049 30 13 20 1545.19 1659.70

150 09935002 32 13 18 1013.82 1115.12

151 09935003 32 13 18 1932.06 2078.25

152 09935004 31 13 19 1638.85 1825.74

153 09935005 32 13 18 1454.80 1580.66

154 09935006 32 13 18 1220.54 1294.30

155 09935007 32 13 18 1213.15 1366.83

156 09935009 32 13 18 1987.69 2292.79

157 09935012 32 13 18 3269.62 3478.81

158 09935014 32 13 18 3101.96 3355.17

159 09933007 32 15 20 1969.24 2394.25

33

14

Page 18: Development of a Computerised Flood Warning Model and ... 15 Technical... · Rufiji Environment Management Project 1 ... and Wetlands of the Rufiji Delta and Floodplain Development

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REMP Technical Report 14 Vol. 2: Appendices

Appendix A6.1: List of 2 m Interval Contours Maps of Rufiji Floodplain from RUBADA

No.

Lower Rufiji

Floodplain 2m

Interval Map

from RUBADA

2m

Contour

Map

Digitized?

Digitized

River

Present for

this Map?

No.

Lower Rufiji

Floodplain 2m

Interval Map

from RUBADA

2m

Contour

Map

Digitized?

Digitized

River

Present for

this Map?

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

B061

B062

B064

B071

B072

B073

B074

B081

B082

B083

B084

B093

B094

C071

C072

C073

C074

C081

C082

C083

C084

C091

C092

C093

C094

D061

D062

D071

D072

D073

D081

D082

D084

D091

D092

D093

D094

D101

D103

D104

D113

D114

E091

E092

E101

E102

E103

E104

E111

E112

E113

E114

E121

No

No

No

No

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

E122

E123

E124

E131

E132

E133

E134

E143

E144

E153

E154

E163

E164

E173

E174

E183

F112

F121

F122

F131

F132

F141

F142

F143

F144

F151

F152

F153

F154

F161

F162

F163

F164

F171

F172

F173

F174

F181

F183

G161

G162

G164

G171

G172

G173

G174

G181

G183

H172

H181

H183

J181

J183

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

No

No

44