Friday, February 22, 2019

FLOOD PROTECTION

Non structural measures to keep people away from flood waters. It contemplated the use of flood plains judiciously, simultaneously permitting vacating of the same for use by the river whenever the situation demands. This technique allows the use of flood plains by reducing the disaster dimension, while retaining its beneficial effects. Flood hazard and vulnerability to floods tend to increase over many areas. due to adverse changes of climatic, terrestrial, hydrological, and socio-economic systems. Therefore increasing attention is being paid to upgrading flood protection systems. As sufficient flood protection cannot be reached in many vulnerable areas with the help of structural means only, further flood risk reduction via non-structural measures is often indispensable. 

FLOOD PLAIN ZONING


It is natural for a river to overflow its banks in the event of heavy rainfall in its upper catchments and spill into the flood plains, which are it domain,. Extensive and often unplanned use of flood plains by man disregarding the basic fact that it is part of the river leads to damage this is one of the main factors responsible for the flood damage reported from different parts of the country in spite of substantial investment in the flood sector in the past. The basic concept of flood plain zoning is to regulate land use in the flood plains in order to restrict the damage due to floods, while deriving maximum benefits form the same.

FLOOD PROOFING

Flood proofing measures help greatly in the mitigation of distress and provide immediate relief to the population in flood prone areas. It is essentially a combination of structural change and emergency action, not involving any evacuation.   The techniques adopted consists of providing raised platform for flood shelter for men and cattle raising the public utility installation especially the platforms for drinking water hand pumps and bore wells above flood level, promoting construction of double storey building wherein the first floor can be used for taking shelter during floods.

FLOOD WARNING

These are issued for different area mostly by the Central  water Commission/Meteorological  department and by the State Irrigation/Flood Department. However, an effective Warning System is one that can release warning in advance, i.e. 72  hours, 48 hours and 24 hours. It can change the existing scenario substantially and render informed decision making in adopting proper measures towards disaster preparedness, mitigation, control, planning and management. This kind of advance warning can help the authorities for better flood preparedness and also effective flood mitigation. Therefore, initiatives have to be taken to modernize the operation of Flood Forecasting & Warning by adopting the state of art technology and integrating it into the forecast and warning dissemination process.

REMOTE SENSING MONITORING

One of the most effective methods of monitoring flood plains is through remote sensing. Of the various techniques available Indian Remote Sensing Satellite (IRS) is perhaps the most versatile. IRS and Land sat satellites are  used to map, inventory and monitor earth features. The major sensing instrument in IRS is a multi-spectral scanning system that produces images of the earth in blue, green, red, and infrared wavelengths of spectrum. The products are black-and-white images, false color composites and images in digital form that can be processed by computers.


PUBLIC AWARENESS PROGRAMME

To make floodplain occupants and or owner aware of identified flood hazards. To encourage individuals to take actions such as flood proofing and developing escape plans, to mitigate their flood potential. To make individuals aware of the existence and operation of flood warning plains. To encourage individuals to keep drainage ways clean and to report potential maintenance problems.


RESPONSE SYSTEM

Management and control of the adverse consequences of floods will require coordinated and effective response systems at all level national,. state, district, local and community, Many of the components of response initiatives will remain the same for different types of disasters. These systems need to be developed considering the multi-hazard scenario of the region to optimally utilize available resources.


EVACUATION PLAN

Evacuation of human population and livestock is the only prescribed means to save them from the fury of floods. Evacuation of flood affected communities can be one of the most difficult response operations, especially, when it involves large population, Evacuation needs to be carried   out as a precautionary measures based on warning indicators, prior to impact, on order to protect flood threatened persons from the full effects of the disasters. Evacuation may also be  necessary after the area has been flooded in order to move persons from a flood affected area to safer and better surroundings,. For carrying out successful evacuation, the threat perception on the part of DM officials is essential. Continuous dialogue with stakeholders such as, early warning providers, transportation authorities, health care authorities/ personnel, food and essential commodity suppliers, civil societies, NGOs and last but not the least, the carrying out successful evacuation.


EMERGENCY RELIEF


Trained community level teams will assist in planning and setting up emergency shelters, distributing relief among the affected people, identifying missing people, and addressing the needs of education, health care, water supply and sanitation, food etc. of the affected community. Members of these teams will be made aware of the specific requirement of the disaster affected communities. It will be ensured by the concerned authorities that the stockpiling of the essential commodities has been carried out.


RELIEF CAMPS


The setting up of relief camps for the people whose houses have been damaged by floods and the provision of basic amnesties in such camp involves. complex logistics of mobilizing relief supplies, tents, water supply and sanitation systems, transport and communication systems, and medical supplies.  The panchayat  building in the villages in flood prone areas will be made flood proof as by raising their plinth level at least 0.6 m above the drainage/flood submergence line and making them at least double storey or constructing ring  bunds around them.

MEDICAL PREPAREDNESS

Floods as a natural disaster have a high potential of precipitation the incidence of mass casualties. There is the risk of drowning and physical trauma along with the threat of diseases associated with contamination of water and the creation of mosquito breeding sites. Direct health effects of a flood may include drowning injuries like cuts sprains fractures electric shocks diarrhea vector and rodent borne disease like malaria leptospirosis skin and eye infections and psychological stress, The indirect health consequences of floods are usually due to  damage caused to health care infrastructure damage to crops and disruption of food supplies destruction of property causing lack of shelter that may lead to increased exposure disease vectors.


Non-Structural measures are more flexible than the structural measures. Hence, they are  particularly useful in global adaptation strategies. Since uncertainty in assessment of impact of climate change is high, a high degree of flexibility of adaptation strategies is important and advantageous.

Friday, February 15, 2019

TECHNOLOGY IN DISASTER MANAGEMENT

A disaster is an event or series of events that leads to sudden disruption of normal life, causing severe damage to life and property to an extent, that available social and economic protection mechanism are inadequate to cope. Disasters could be, natural (geological, hydro-meteorological and biological) or induced by human processes (environmental degradation an technological hazards).

While we cannot prevent an earthquake or a hurricane from occurring, or volcano from erupting, we  can apply the scientific knowledge and technical know-how to issue early warnings  on volcanoes and organize proper community response to such warnings. Science and technology help us to understand the mechanism of natural hazards of atmospherical, geological, hydrological, and biological origins which are made up of an orderly systems of facts that have been learned from study, experiments, and observations of floods, severe storms, earthquakes, landslides, volcanic eruptions and tsunamis, and their impacts on humankind and his works.

Information Technology in Disaster Management

Information Technology is changing every aspect of human life. it enhances the quality and effectiveness of trade, manufacturing, services, other aspects of human life such a education, research, culture, entertainment, communication, national security, etc. Disaster management needs drastic  improvements n its sources to decrease damage and see the life of people, To achieve this main object, disaster management has to face challenges for data collection, data management, translation integration and communication. IT pays crucial role in this respect. The advanced techniques of information technology such as remote sensing satellite communication, GIS, etc. can help in planning and implementation of disaster management.

The changing trends have opened up a large number of scientific and technological resources and skills to reduce disaster risk. The information and communication Technology tools are discussed below:

1. Internet 
In the present era of electronic communication, the internet provides a useful platform for disaster mitigation communications. The role of Internet is becoming increasingly important because of the following reasons:
  • It facilitates, the opportunities to enhance the capabilities of addressing hazard awareness and risk management practices before, during, and following emergency events.
  • It provides a new and potentially revolutionary option for the rapid, automatic, and global dissemination of disaster information.
  • Network equally provides the means of access to more reference and resource material to more people, in more ways.
2. GIS and Remote Sensing
Geographic information technology tools like Geographic Information Systems (GIS) and Remote sensing (RS) support all aspects of disaster management. GIS and RS are essential as effective preparedness, communication and training tool for disaster management. Most potential disasters can be modeled. Modeling allows disaster managers to view the scope of a disaster , where the damage may be the greatest, what lives and property at highest risk, and what rspose resources are required and where GIS can play a very important role in this exercise. The specific GIS applications in the field of Risk the assessment are:
  • Hazard Mapping
  • Threat Maps
  • Disaster Management
  • Records Management 
Some application of GIS and Remote Sensing in various disasters is as follows:-
a. Drought
GIS and Remote Sensing can be used in drought relief management such as early warnings of drought conditions will help to plan out the strategies to organize relief work. Satellite data may be used for to target potential groundwater sites for taking up well-digging programmes.

b. Earthquake
GIS and Remote Sensing can be used fro preparing seismic hazards maps in order to assess the exact nature of risks.

c. Floods
Satellite data can be effectively used for mapping and monitoring the flood inundated areas, flood damage assessment, flood hazard zoning and post-flood survey of rivers configuration and protection works.

d. Cyclone
A cyclone is a storm accompanied by high speed whistling an howling winds. It brings torrential rains. A cyclone causes heavy floods. It uproots electricity supply and telecommunication lines. Road and rail movements come to halt. There can be outbreak of diseases like Cholera, Jaundice or Viral fever. Advanced techniques like, GIS, remote sensing tools can be used to  identify the vulnerable population with the single hazard component. These tools can be used to calculate state level population affected by different type of storms. But, calculating vulnerability by GIS with multiple hazards and coping capacity is not easy job for decision makers.

3. Warning and Forecasting System
An advance system of forecasting, monitoring and issuing early warning plays the most significant part in determining whether a natural hazard will assume disastrous proportions or not. Our country has the following forecasting systems: 


A. Indian Meteorological Department (IMD)
Indian meteorological Department provides cyclone warnings from the Area Cyclone Warning Centres (ACWCs. It has developed the necessary infrastructure to originate and disseminate the cyclone warning at appropriate levels. It has made operational a satellite based communication system called Cyclone Warning Dissemination System for direct dissemination of cyclone warnings to the cyclone prone coastal areas.

B. National Remote Sensing Agency (NRSA)

Long -term drought proofing programmes on the natural resources of the district have been greatly helped by the use of satellite data obtained b NRSA. Satellite data can be used very effectively for mapping and monitoring the flood-inundated areas, flood damage assessment, flood hazard zoning and past flood survey of river configuration and protection works.


C. Seismological Observations
Seismological observations in the county are made through national network of 36 seismic stations operated by the IMD, which is the nodal  agency. These stations have collected data over long periods of time.

D. Flood Forecasting
The Central Water Commission (CWC), Ministry of Water Resources, issues floods forecasts and warnings. These are used for alerting the public and for taking appropriate measures by concerned administrative and state engineering agencies in the flood hazard mitigation. Information is gathered from the CWCs vast network of Forecasting Stations on various rivers in the country.

E. Cyclone Tracking
Information on cyclone warnings is furnished on a real-time basis to the control room set up in the Ministry of Agriculture, Government of India. High power Cyclone Detection Radars (CDRs) that are installed along the coastal belt of India have proved to be very useful tool to the cyclone locate warning work. These radars can locate and track approaching Tropical Cyclones within a range of 400 km. The existing mode of dissemination of cyclone warnings to various government officials is through high priority telegrams, telephones, telex and fax.


Disaster management activities depend on large volumes of accurate, relevant, on time geo-information that various organizations systematically create and maintain. The advancement in Information and Communication Technology in the form of Internet, GIS, Remote Sensing, Satellite communication, etc. can help a great dealing planning an implementation of hazards reduction schemes. For maximum benefit, new technologies for public communication should be made use and natural disaster mitigation messages should be conveyed through these measures. GIS can improve the quality and power of analysis of natural hazards assessments, guide development activities and assist planners in the selection of mitigation measures and in the implementation of emergency preparedness and response action. Remote Sensing, on the other hand, as a tool can very effectively contribute towards identification of hazardous areas, monitor the planet for its change on a real time basis and give early warning to many impending disasters. Communication satellites have become vital for providing emergency communication and timely relief measures. Integration of space technology inputs into natural disaster monitoring an mitigation mechanisms is critical for hazard reduction. Awareness and training in information technology in a much grater measures is required to develop human resources. 

Sunday, February 10, 2019


DISASTER PREPAREDNESS

DISASTER: - A disaster is a sudden, calamitous event that seriously disrupts the functioning of a community or society and causes human, material, and economic or environmental losses that exceed the community’s or society’s ability to cope using its own resources. Though often caused by nature, disasters can have human origins.

TYPES OF DISASTERS: - Disasters can take many different forms, and the duration can range from an hourly disruption to days or weeks of ongoing destruction. Below is a list of the various types of disasters – both natural and man-made or technological in nature – that can impact a community.

Natural Types of Disasters:-

Man-Made and Technological Types of Disasters:-
DISASTER PREPAREDNESS:- Disaster preparedness refers to measures taken to prepare for and reduce the effects of disasters. That is, to predict and - where possible - prevent disasters, mitigate their impact on vulnerable populations, and respond to and effectively cope with their consequences, at local, national and international levels.

This work, key to development, essentially involves reducing the vulnerability of households and communities in disaster-prone areas and improving their ability to cope with the effects of disasters; strengthening the capacities of National & State level disaster response groups in disaster preparedness and post-disaster response; determining a National & State level disaster response groups role and mandate in national disaster plans; and establishing regional networks of National & State level disaster response groups that will strengthen the Federation’s collective impact in disaster preparedness and response at the international level.

Disaster Preparedness provides an opportunity to design effective, realistic and coordinated planning reduces duplication of efforts and increases the overall effectiveness of disaster preparedness activities by National & State level disaster response groups, households and community members. Disaster Preparedness efforts can help minimize the impact of disasters on communities and also result in saving more lives and safeguarding livelihoods during any disaster situation and enable the affected population to return to a normal lifestyle within a short time period. 

Preparedness for a Disaster:-
  • Find out what could happen. Stay informed.
  • Make a household disaster and emergency plan, considering everyone in your household.
  • Reduce structural, non-structural and environmental risks in and around your home.
  • Learn response skills and practice your plan.
  • Prepared response provisions to survive for about a week. Prepare evacuation bags.
  • Work together with your workplace, schools, neighbours and local community to assess your risks, plan to reduce them, and prepare to respond
Awareness for Disaster Preparedness:- Disaster preparedness is a continuous and integrated process resulting from a wide range of risk reduction activities and resources rather than from a distinct sectoral activity by itself. It requires the contributions of many different areas - ranging from training and logistics, to health care, recovery, livelihood to institutional development.

Increasing the efficiency, effectiveness and impact of disaster response mechanisms at the community, national and international level. This includes:

· Raising awareness of disaster hazards through public education, encouraging vulnerable people to take preventative and mitigating actions where possible before disaster strikes. Ensure that the Knowledge from prediction and early warning systems can be accessed, understood and acted upon by local communities.
·  The development and regular testing of warning systems (linked to forecasting systems) and plans for evacuation or other measures to be taken during a disaster alert period to minimise potential loss of life, livelihoods and physical damage.
·   The education and training of volunteers, staff and the population at risk
·   The training of first-aid and disaster response teams
·   The establishment of disaster response policies, standards, organizational arrangements and operational plans to be followed after a disaster.
·  Strengthening community-based disaster preparedness through National Society programmes for the community or through direct support of the community's own activity. This could include educating, preparing and supporting local populations and communities in their everyday efforts to reduce risks and prepare their own local response mechanisms to address disaster emergency situations.

A comprehensive disaster preparedness strategy would therefore include the following elements:
  1. Hazard, risk and vulnerability assessments
  2. Response mechanisms and strategies
  3. Preparedness plans
  4. Coordination
  5. Information management
  6. Early warning systems
  7. Resource mobilization
  8. Public education, training,& Drills and simulations
  9. Community-Based disaster preparedness

Community-based disaster preparedness incorporates the concept of building on and using local knowledge and resources in order to improve a population’s capacity to withstand the impact of disasters. As first responders to a disaster (i.e., search and rescue teams and the provision of emergency treatment and relief), communities need to be equipped to manage with the consequences of small-, medium- and large-scale natural hazards when they strike.

Community preparedness activities should include an analysis of risks, vulnerability and capacities (VCA). Early warning systems should be accessible and understood by local communities, who can then act on warnings. Public awareness and public education campaigns, organization and training of community disaster response teams, and the development and testing of community response plans through simulations are all actions that empower communities in the face of disasters.