1

2

3

4

5

6

7

8

sq km (approx)

Number of fish species

Fish species richness for area

Number of fish families

Fish family richness for area

Wilderness value

Water Resources Vulnerability Index - I

Overall vulnerability

Amazon

6063681

Amazon

2500

Amazon

2.85

Amazon

49

Maroni

25.11

Mamberamo

2989

Tana

640

Cauvery

0.61

Congo/Zaire

3692062

Congo/Zaire

690

Zaire

1.68

Orinoco

45

Essequibo

24.49

Kuskokwim

2965

Narmada

639

Mahanadi

0.59

Mississippi

3225218

Mekong

450

Mekong

1.62

Tocantins

45

Amazon

22.97

Atrato

2905

Penner

639

Godavari

0.58

Nile

3071306

Yangtze

320

Cauvery

1.62

Parana

44

Tocantins

22.68

Stikine

2888

Krishna

639

Krishna

0.57

Ob

3070962

Orinoco

318

Sittang

1.59

Essequibo

44

Orinoco

22.35

Amazon

2880

Godavari

639

Penner

0.57

Parana

2571187

Cauvery

265

Kapuas

1.53

Maroni

43

Perak

19.86

Essequibo

2830

Mahanadi

639

Narmada

0.54

Lena

2404487

Kapuas

250

Sinu

1.50

Parnaiba

40

Parana

19.52

Mackenzie

2816

Cauvery

639

Tapti

0.53

Amur

2207981

Mississippi

225

Chao Phraya

1.32

Magdalena

38

Parnaiba

19.24

Maroni

2783

Tapti

638

Helmand

0.44

Niger

2112774

Chao Phraya

222

Orinoco

1.24

S. Francisco

38

Magdalena

17.87

Yukon

2779

Helmand

637

Weser

0.41

Yenisey

1916400

Sittang

200

Mahakam

1.23

Mekong

37

Pahang

17.64

Indigirka

2740

Dra

611

Tigris-Euphrates

0.40

Yangtze

1711156

Krishna

187

Yangtze

1.10

Chao Phraya

36

Chao Phraya

16.64

Lena

2690

Indus

604

Ganges-Brahmaputra

0.39

Ganges-Brahmaputra

1684918

Ogooue

184

Song Hong

1.08

Niger

35

S. Francisco

16.09

Tocantins

2663

Nile

596

Loire

0.39

Mackenzie

1529031

Song Hong

180

Ogooue

1.04

Perak

35

Sinu

16.07

Rajang

2634

Tigris-Euphrates

581

Seine

0.38

Volga

1387306

Mahakam

174

Pearl

1.04

Salween

34

Rajang

14.81

Yenisey

2622

Ganges-Brahmaputra

574

Oder

0.38

Zambezi

1384999

Parana

170

Krishna

1.02

Uruguay

34

Mahakam

14.79

Orinoco

2567

Jubba-Shebelle

566

Kura-Araks

0.36

Saskatchewan-Nelson

1134018

Hwang Ho

160

Sanaga

0.85

Irrawaddy

34

Mekong

14.63

Sinu

2558

Murghab

551

Indus

0.36

St. Lawrence

1052181

Niger

149

Susquehanna

0.82

Pahang

34

Sittang

14.52

Kolyma

2540

Senegal

549

Vistula

0.36

Murray-Darling

1049806

Sinu

148

Savannah

0.80

Congo/Zaire

33

Atrato

14.28

Fly

2309

Hari Rud

526

Garonne

0.36

Indus

1031425

Indus

147

Alabama

0.79

Mahakam

33

Tembesi-Hari

14.01

Cunene

2286

Amu Darya

517

Sevan Lake

0.35

Orinoco

938481

Salween

143

Salween

0.76

Kapuas

32

Salween

13.75

Dra

2276

Kura-Araks

509

Tana

0.34

Hwang Ho

880881

Magdalena

135

Magdalena

0.72

Volta

32

Kapuas

13.35

Rufiji

2275

Sevan Lake

487

Panuco

0.34

Yukon

829506

Sanaga

135

Hudson

0.62

Rajang

32

Uruguay

13.17

Kapuas

2264

Rufiji

480

Kizil

0.33

Danube

807881

Volta

132

Mississippi

0.59

Ganges-Brahmaputra

32

Irrawaddy

12.95

Okavango

2258

Omo Wenz

480

Liao

0.33

Mekong

804381

Chari

130

Hwang Ho

0.56

Sittang

31

Comoe

12.83

Ogooue

2246

Olifants

480

Song Hong

0.33

Jubba-Shebelle

803212

Alabama

122

Fly

0.56

Sinu

31

Sanaga

11.86

Omo Wenz

2151

Groot

480

Rhine

0.32

Tocantins

779874

Zambezi

122

Volta

0.55

Sanaga

31

Sassandra

11.06

Skeena

2145

Yangtze

480

Po

0.32

Kolyma

746043

Amur

120

Yalu Jiang

0.50

Chari

31

Niger

10.88

Lurio

2137

Save

480

Rhone

0.32

Okavango

694456

Nile

115

Gambia

0.47

Tembesi-Hari

31

Volta

10.83

Baikal

2098

Syr Darya

480

Ting

0.31

Chari

669706

Uruguay

115

Uruguay

0.46

Comoe

31

Ca

10.06

Mahakam

2057

Tsiribihina

480

Yalu Jiang

0.31

Colorado

669056

Susquehanna

111

Indus

0.44

Atrato

31

Ogooue

9.96

Jubba-Shebelle

2021

Mangoky

480

Min

0.31

Columbia

668587

Pearl

106

Chari

0.42

Ogooue

30

Chari

8.96

Nile

2020

Betsiboka

480

Hari Rud

0.30

Rio Grande

642343

Fly

101

Narmada

0.37

Nile

30

Krishna

8.72

Zambezi

1996

Santiago-Lerma-Chapala

480

Balsas

0.30

S. Francisco

623856

St. Lawrence

93

Parana

0.37

Mississippi

29

Penner

8.71

Fraser

1988

Seine

480

Elbe

0.29

Orange

621224

Parnaiba

90

Usumacinta

0.34

Krishna

29

Cauvery

8.56

Ob

1973

Loire

480

Santiago-Lerma-Chapala

0.29

Amu Darya

611525

Savannah

88

Panuco

0.33

Sassandra

29

Ganges-Brahmaputra

8.29

Tana

1964

Lurio

479

Murghab

0.29

Tigris-Euphrates

600356

Senegal

86

Elbe

0.33

Zambezi

28

Ma

8.22

Amur

1956

Hwang Ho

479

Betsiboka

0.28

Baikal

586799

Hudson

80

Niger

0.28

Senegal

28

Susquehanna

8.10

Niger

1949

Papaloapan

479

Si

0.28

Dnieper

532756

Usumacinta

80

Rajang

0.28

Godavari

28

Gambia

8.05

Magdalena

1948

Si

479

Mangoky

0.27

Don

485837

Gambia

79

Sassandra

0.28

Cauvery

27

Tapti

7.95

Sepik

1930

Balsas

479

Tsiribihina

0.27

Si

460243

Irrawaddy

79

Papaloapan

0.26

Susquehanna

26

Zaire

7.87

Congo/Zaire

1869

Min

479

Nile

0.26

Senegal

435981

Okavango

79

Parnaiba

0.23

Gambia

26

Narmada

7.47

Senegal

1835

Yalu Jiang

479

Senegal

0.24

Syr Darya

429118

Narmada

77

Zambezi

0.18

Narmada

26

Godavari

7.29

Rio Colorado

1828

Ting

479

Ma

0.24

Rio Colorado

419081

Elbe

77

Senegal

0.11

Penner

26

Senegal

6.74

Olifants

1811

Liao

479

Thames

0.23

Limpopo

414524

Panuco

75

Rhone

0.09

Mahanadi

26

Mahanadi

6.67

Usumacinta

1808

Kizil

479

Papaloapan

0.23

Volta

414243

Yalu Jiang

74

Irrawaddy

0.06

Tapti

26

Titicaca

6.62

Pahang

1806

Panuco

479

Ca

0.23

Irrawaddy

387631

Tigris-Euphrates

71

Amur

0.06

Ca

26

Hudson

6.09

Chobut

1783

Weser

479

Danube

0.22

N. Dvina

359412

Rio Grande

71

Dniester

0.04

St. Lawrence

25

Savannah

5.69

Amu Darya

1780

Chao Phraya

478

Chao Phraya

0.22

Uruguay

343618

Sassandra

65

Sepik

-0.02

Ma

25

Nile

5.20

Chari

1776

Song Hong

478

Syr Darya

0.22

Parnaiba

330750

Volga

61

St. Lawrence

-0.02

Titicaca

25

Pearl

5.10

Negro

1770

Garonne

477

Amu Darya

0.21

Indigirka

328118

Rajang

59

Brazos

-0.03

Song Hong

24

Kwanza

4.77

Limpopo

1752

Oder

469

Save

0.21

Godavari

320937

Rhone

58

Dalalven

-0.06

Indus

24

Zambezi

4.64

Parnaiba

1744

Vistula

464

Jubba-Shebelle

0.21

Helmand

317481

Papaloapan

58

Nile

-0.07

Kwanza

24

Song Hong

4.41

Kwanza

1744

Yaqui

463

Gambia

0.21

Liao

274124

Dnieper

58

Okavango

-0.08

Yangtze

23

Mississippi

4.11

Indus

1739

Rhone

460

Hwang Ho

0.21

Ural

261718

Brazos

55

Weser

-0.10

Hudson

23

Omo Wenz

4.07

Groot

1731

Niger

457

Dniester

0.20

Krishna

252443

Sepik

53

Tigris-Euphrates

-0.16

Alabama

22

Alabama

3.17

Murghab

1713

Po

452

Yangtze

0.20

Salween

249481

Mackenzie

53

W. Dvina

-0.16

Savannah

22

Save

2.15

S. Francisco

1700

Gambia

449

Dra

0.19

Fraser

239943

Dniester

52

Rio Grande

-0.17

Saskatchewan-Nelson

22

St. Lawrence

2.14

Kemijoki

1673

Limpopo

448

Yaqui

0.19

Magdalena

233343

Danube

52

Terek

-0.21

Si

22

Indus

1.18

N. Dvina

1665

Zambezi

446

Tagus

0.18

Ogooue

221968

Ural

48

Kura-Araks

-0.24

Omo Wenz

22

Rufiji

1.11

Helmand

1660

Orange

440

Mekong

0.18

Rufiji

204050

Syr Darya

48

Vistula

-0.30

Pearl

21

Si

0.64

Titicaca

1657

Chari

436

Groot

0.17

Rhine

192887

Kura-Araks

47

Skeena

-0.32

Okavango

21

Yalu Jiang

-0.27

Yangtze

1653

Mekong

436

Ural

0.17

Vistula

183249

Limpopo

47

Sacramento

-0.33

Jubba-Shebelle

21

Ting

-0.32

Perak

1652

Ca

425

Douro-Duero

0.15

Song Hong

172462

Don

47

Dnieper

-0.33

Save

21

Yangtze

-0.74

Comoe

1651

Ma

424

Olifants

0.14

Essequibo

165712

Vistula

46

Ural

-0.35

Rufiji

21

Saskatchewan-Nelson

-0.99

Orange

1651

Usumacinta

418

Orange

0.14

Oder

165156

Columbia

45

Glama

-0.35

Limpopo

19

Lurio

-1.09

Parana

1635

Rhine

417

Hudson

0.13

Negro

160287

Rhine

44

Rhine

-0.36

Amur

17

Okavango

-1.11