Key Environmental Issues in the Dongnai River Basin, Vietnam

1
Welcome to
Key Environmental Issues in the Dongnai River
Basin, Vietnam
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Part 1
Introduction to the Dongnai River Basin
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General Information
The Map of Vietnam
(Site of the Dongnai River Basin)
Ha Noi
Area of the basin 44,612 km2 Concerning with 11
Provinces/city Population about 15 million The
biggest urbanization and industrialization in
Vietnam Rate of urbanization 51 Number of
Industrial Zones 2005 47 2010 75
(Planning) There are about 57,000 enterprises
Ho Chi Minh City
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Map of Dongnai River Basin
The Dongnai river basin can be divided into
several catchment-areas
DAK LAK
Be River Catchment
Danhim Dadung River Catchment
NINH THUAN
LAM DONG
BINH PHUOC
Saigon River Catchment
TAY NINH
BINH DUONG
Langa River Catchment
Vamco River Catchment
BINH THUAN
DONG NAI
Dongnai River Basin
HCMC
LONG AN
BA RIA VUNG TAU
Total area of the basin 44,612 km2
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Water Resources in the Basin

• Annual average rainfall of 2,100 mm
• The rainy season is often from May to November,
  with 83 92 total yearly rainfall
• The dry season is often from December to April,
  with 8 13 total yearly rainfall

• Yearly average stream flow is about 36.6 km3
• On an average, the per ha stream flow is 8,000 m3
• On an average, the per capita stream flow is
  2,400 m3
• Average stream flow module is about 25 lit/s.km2

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The importance of Water Resources in the Basin

• To the water supply for
• Human and animal activities (with population of
  about 15 million)
• Industrial and service activities (with 47 of
  industrial zone and 57,000 enterprises)
• Irrigating (1.8 million ha)

• To generate electricity (with 7 of
  hydro-electricity plants)
• To waterway transport
• To aquaculture
• To aquatic ecosystem conservation

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Part 2
Some Environmental Problems in the Dongnai River
Basin
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Issue 1 Pollution of Water Sources
Th? D?u M?t
Tình tr?ng ch?t lu?ng nu?c
Biên Hòa
TPHCM
Khá t?t Tuong d?i t?t Trung bình Ô nhi?m Ô
nhi?m n?ng
Vung Tàu
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Issue 1 Pollution of Water Sources
1. Hi?n tu?ng suy gi?m m?nh DO trên sông Sài Gòn
và tuong quan gi?a DO và BOD5 khá b?t thu?ng
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Issue 1 Pollution of Water Sources
2. Organic pollution in Thi vai river
3. Presence of Pb in SG-DN river
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Issue 2 Water Competition in the Basin
Domestic Water Supply
Industrial Water Supply
Discharging wastewater
River transportation
Aquatic food growing
Flooding prevention
Aquatic entertainment
Irrigation
Fish exploiting
Sand exploiting
Hydro-electricity
No competition Low competition
Middle competition High competition
Clash of interests
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Issue 3 Economic-Social Development

• Rapid population growth
• Urbanization
• Industrialization

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Issue 4 S? c? tràn d?u
Th?ng kê so b?
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Issue 5 Qui ho?ch s? d?ng d?t chua h?p lý
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Thank you very much for your attention