The 1998 floods in Bangladesh covered over two thirds of the country under water, leaving 30 million people homeless and killing over 1,000 people. The floods severely damaged crops on 668,529 hectares of land and destroyed livelihoods, increasing poverty in a country where many were already living in extreme poverty. The environmental impacts were also significant, with human waste polluting drinking water and much of the habitat in the delta region being destroyed.
All abouts floods, Such as definition of floods, floods types, Causes of flood, Some Terrible Floods in Bangladesh, effects of floods, Steps to reduce flood, Preparation to Management of flood.
he management of water resources has become a critical need in Bangladesh because of growing demand for water and increasing conflict over its alternative uses. As populations expand and make various uses of water, its growing scarcity becomes a serious issue in developing countries such as Bangladesh.
All abouts floods, Such as definition of floods, floods types, Causes of flood, Some Terrible Floods in Bangladesh, effects of floods, Steps to reduce flood, Preparation to Management of flood.
he management of water resources has become a critical need in Bangladesh because of growing demand for water and increasing conflict over its alternative uses. As populations expand and make various uses of water, its growing scarcity becomes a serious issue in developing countries such as Bangladesh.
Disaster Management in Bangladesh: Risk Reduction and ChallengesSajid Karim
Presentation will address the following
Disaster Vulnerability of Bangladesh
Disaster Management Mechanism in Bangladesh
Disaster Risk Reduction Strategies of Bangladesh
Challenges and Recommendations
Here I've shown statistics of some major disasters in Bangladesh. Also discussed how those disasters were managed. And last show some possible steps which can reduce the impact of the disaster.
Development Planning and Management Ecosystem in Bangladesh
Business as Usual VS BDP 2100
Delta Opportunities
Delta Challenges
BDP 2100: Vision, Goals and Adaptive Approach
BDP 2100 Strategies
Financing Strategy & Investment Plan
BDP 2100 Governance: Implementation Coordination, Monitoring and Evaluation and Delta Knowledge Hub
Delta Decision Support Tool and Knowledge Management
A cloudburst is an extreme amount of precipitation, sometimes with hail and thunder, which normally lasts no longer than a few minutes but is capable of creating flood conditions.
Presentation by Dr A Qayyum, Comprehensive Disaster Management Programme, Bangladesh at the CCAFS Workshop on Institutions and Policies to Scale out Climate Smart Agriculture held between 2-5 December 2013 in Colombo, Sri Lanka.
This presentation will cover:
General information about Bangladesh
Seasons of Bangladesh
River of Bangladesh
Amount monthly precipitation over the year
Average humidity over the year
Water quality standards
Hazards Bangladesh faces
Flood and drought event in Bangladesh
Water pollution in Bangladesh
Government’s law and policy
Chennai flood 2015, The Disaster, The Challenges and The SolutionsBharathi
Why Pollute Our City with Plastics & PET Bottles?
We can help avoid WATER BORNE DISEASES Gastro enteritis, Cholera,Typhoid,Leptospirosis,
Hepatitis A & E
Save our city from another disaster from Water Borne Diseases,avoid plastics and PET bottles,
while you provide relief work with a safe disinfected potable water using NOBLE CHLOR -
ONSITE POTABLE CHLORINATED WATER TREATMENT SYSTEMS.
Contents:
- Definition
- Chittagong City
- Water logging in Chittagong City
- Causes of Water logging in Chittagong City
- Effects of waterlogging
- Probable Solutions to waterlogging
By Md. Rezaul Hasan, Md. Shamsuddin, Md. Sohel Masud, Dr. AFM Afzal Hossain (Institute of Water Modelling)
Revitalizing the Ganges Coastal Zone Conference
21-23 October 2014, Dhaka, Bangladesh
http://waterandfood.org/ganges-conference/
Disaster Management in Bangladesh: Risk Reduction and ChallengesSajid Karim
Presentation will address the following
Disaster Vulnerability of Bangladesh
Disaster Management Mechanism in Bangladesh
Disaster Risk Reduction Strategies of Bangladesh
Challenges and Recommendations
Here I've shown statistics of some major disasters in Bangladesh. Also discussed how those disasters were managed. And last show some possible steps which can reduce the impact of the disaster.
Development Planning and Management Ecosystem in Bangladesh
Business as Usual VS BDP 2100
Delta Opportunities
Delta Challenges
BDP 2100: Vision, Goals and Adaptive Approach
BDP 2100 Strategies
Financing Strategy & Investment Plan
BDP 2100 Governance: Implementation Coordination, Monitoring and Evaluation and Delta Knowledge Hub
Delta Decision Support Tool and Knowledge Management
A cloudburst is an extreme amount of precipitation, sometimes with hail and thunder, which normally lasts no longer than a few minutes but is capable of creating flood conditions.
Presentation by Dr A Qayyum, Comprehensive Disaster Management Programme, Bangladesh at the CCAFS Workshop on Institutions and Policies to Scale out Climate Smart Agriculture held between 2-5 December 2013 in Colombo, Sri Lanka.
This presentation will cover:
General information about Bangladesh
Seasons of Bangladesh
River of Bangladesh
Amount monthly precipitation over the year
Average humidity over the year
Water quality standards
Hazards Bangladesh faces
Flood and drought event in Bangladesh
Water pollution in Bangladesh
Government’s law and policy
Chennai flood 2015, The Disaster, The Challenges and The SolutionsBharathi
Why Pollute Our City with Plastics & PET Bottles?
We can help avoid WATER BORNE DISEASES Gastro enteritis, Cholera,Typhoid,Leptospirosis,
Hepatitis A & E
Save our city from another disaster from Water Borne Diseases,avoid plastics and PET bottles,
while you provide relief work with a safe disinfected potable water using NOBLE CHLOR -
ONSITE POTABLE CHLORINATED WATER TREATMENT SYSTEMS.
Contents:
- Definition
- Chittagong City
- Water logging in Chittagong City
- Causes of Water logging in Chittagong City
- Effects of waterlogging
- Probable Solutions to waterlogging
By Md. Rezaul Hasan, Md. Shamsuddin, Md. Sohel Masud, Dr. AFM Afzal Hossain (Institute of Water Modelling)
Revitalizing the Ganges Coastal Zone Conference
21-23 October 2014, Dhaka, Bangladesh
http://waterandfood.org/ganges-conference/
The main components of an earth dam are as follows :
1. Impervious core
2. Pervious shell
3. Filter
4. Rock toe
5. U/S slope protection
6. D/S slope protection
7. Cutoff
core shouldnot be less than 3 m and its height should be 1 m more than the maximum water levelin the reservoir.
The upstream pervious zone provides free drainage during sudden drawdown. ,
Usually following types of filters are provided :
(1) Toe filter
(2) Horizontal drainage filter (blanket)
(3) Chimney drains
Such a filter is sometimes known as inverted filter or reverse filter.
Rock toe keeps the phreatic line well within the section and also facilitates drainage.
The following measures are taken to protect the slope.
(1) Rock riprap
(2) Concrete pavement
(3) Steel facing
(4) Bituminous pavement
(5) Precast concrete blocks
Cut off is required to
(1) reduce loss of stored water through foundation and abutments
(2) Prevent sub surface erosion by piping.
Cutoff may be provided in the following ways :
• by providing concrete cutoff wall
• by providing cutoff trench filled with impervious material
• by driving sheet pile
• by curtain grouting
Hydraulic failures .... 40%
Seepage failures…….. 30%
Structural failures .... 30%
(1) Overtopping
(2) Erosion of u/s slope by waves
(3) Erosion of d/s slope by wind and rain
(4) Erosion of d/s toe
(5) Frost action
(1) Overtopping = the design flood is under estimated.
spillway capacity is not adequet
spillway gates are not properly operated
free board is not sufficient
excessive settlement of the foundation and dam
(2) Erosion of u/s slope by waves = The waves developed near the top water surface due to the winds, try to notch out the soil from the upstream face and may even, sometimes, cause the slip of the upstream slope.
Upstream stone pitching or riprap should, therefore, be provided to avoid such failures.
(3) Erosion of d/s slope by wind and rain = The rainwater flowing down the slope; may result in the formation of 'gullies' on the downstream slope thus damaging the dam which may generally lead to partial failure of the dam or in some cases it may cause complete failure of the dam.
Erosion of d/s toe : = Toe erosion may occur due to two reasons :
erosion due to tail water
erosion due to cross currents that may come from spillway buckets.
Frost action : = If the earth dam is located at a place where the temperature falls below the freezing point, frost may form in the pores of the soil in the earth dam.
When there is heaving, the cracks may form in the soil. This may lead to dangerous seepage and consequent failure.
Seepage failures : = Seepage failures may occur due to the following causes :
(1) Piping through the foundation
(2) Piping through the dam
(3) Sloughing of d/s toe
Structural failures :=
Structural failures in earth dams are generally shear failures leading to sliding of the tents or the foundations.
(1) u/s and d/s slope failures due to construction pore pressures
(2) u/s slope failure due to sudden drawdown
(3) D/s slope failure due to steady seepage
(4) Foundation slide due to spontaneous liquefaction
(5) Failure due to earthquake
(6) Failure by spreading
(7) Slope protection failures
(8) Failure due to damage caused by borrowing animals
(9) Failure due to holes caused by leaching of water soluable salts
Criteria for safe Design of Earth Dam :
Section of an Earth Dam :
The design of an earth dam essentially consists of determining such a cross section
the dam which when constructed with the available materials will fulfill its required
tion with adequate safety. Thus there are two aspects of the design of an earth dam.
Geography notes Hydrology, Atmosphere, Weathering, Population and Migration
Casestudies aren't included - sorry. Hope these are helpful. Good luck everyone with your exams.
To briefly describe the various impacts of a hurricane and to give the social and economic consequences of each. The degree by which any of these can affect the human and physical environment can vary. From little to no damage, to the extremes.
Bangladesh , the largest delta on earth, is situated
in South Asia. It is located between 20°
34′ and
26°
38′ north latitude and 88°
01′ and 92°
41′ east
longitude. It is bordered by India on the west,
north, and east, by Myanmar on the southeast, and
by the Bay of Bengal on the south. The area of the
country is 147,570 km2
. Most of the country is
low-lying comprising mainly the delta of the
Ganges and Brahmaputra rivers. A total of 80% of
the country is floodplain . The environment of the
country is under severe pressure due to changing
climate and destructive anthropogenic activities.
Environmental degradation is directly and
indirectly affecting human health, ecosystems
, and economic growth of the country. Demographic pressure, poverty,lack of proper
awareness on environmental issues, and lack of implementation and monitoring of
environmental rules are the main causes for existing environmental condition of
Bangladesh. The climatic condition of Bangladesh is tropical monsoon. The country
currently faces several environmental issues which threaten these resources, including
groundwater metal contamination, increased groundwater salinity, cyclones and flooding, and
sedimentation and changing patterns of stream flow due to watershed mismanagement. Some
of these, such as the changing patterns of stream flow and presence of lead in groundwater,
can be directly correlated with human activity and industrial processes, while others, such as
cyclones and flooding are naturally occurring issues.
Climate change vulnerability and adaptation in Egygpt and NAP processNAP Events
Presented by: Mohamed Ismail Ibrahim Elsehamy
7.2 Approaches / adaptation solutions (1/2)
The section will provide best practices regarding various adaptation approaches or solutions at various scales based on latest science. Examples to be featured include ecosystem-based approaches, community based adaptation, responses to heat waves and ways to deal with shifting growing seasons in agriculture. The session will also feature practical experiences from countries in addressing issues at multiple scales. This is the first of two sessions on this topic. The second is under session 8.1.
2. Information about Bangladesh
• Bangladesh is a country in south-east Asia that suffers
annual flooding
• It is probably country affected by the most of floods
• The floodwaters bring deposited sediment which makes
the delta and floodplains very fertile but frequently is
severe causing loss of life and population suffer
• Extreme poverty and geographic pressure increase the
suffering
• Much of the country´s budget must be used for recovery
3. Effects of the 1998 Floods
• Over two thirds of land was covered by water an the
capital Dhaka, was 2m under water.
• 30 million people made homeless
• Death toll of 1,070 people
• Food supplies severely affected because of crops
being flooded an area of 668,529ha.
4. Economic Impacts
• The economy had a decrease of 20% exports in
industries.
• 400 clothing companies closed increased
unemployment.
• The crops were destroyed by flood which
mean farmers being affected too.
5. Environmental Impact
• An embankment protecting Sandwip, a large
coastal island, was breached by a high tide.
• It destroyed most of the habited in delta.
• Also it causes the great damage to forest around
the area.
• Human waste being realised in to the
environment witch cause great damage to
drinking water.