4.0 CHENNAI FLOOD MITIGATION MEASURES
The mitigation measures have to address flood avoidance, flood tolerance, and flood resistance in an integrated way. The measures that are implemented and the new measures to be developed are meant to control causative factors like uncontrolled urban sprawl, loss of natural drainage, the inadequacy of the storm water drainage system, lack of maintenance of existing systems, increase in impervious surfaces and lack of coordination between stakeholders involved in implementing the measures. The measures could be broadly classified into structural and nonstructural measures. These measures include institutional, physical, socio- economic and environmental measures.
4.1 STRUCTURAL MEASURES
The structural measures …show more content…
The nonstructural measures fall within categories of institutional measures, socioeconomic measures, and environmental measures.
4.2.1 Institutional Measures
• Pre-monsoon meeting - Conducted annually by Corporation of Chennai, the meeting discuss at (i) how to clean drains (ii) how to evacuate the population before flooding (iii) how to supply food, shelter, and medical supply during the flood and (iv) how to deal with water stagnation after flooding.
• Early Warning System and Real Time Monitoring - This system involves real-time monitoring of rainfall. The entire Chennai Metropolitan Area (CMA) is mapped using Airborne Laser Terrain Mapping. The sensors installed in the catchment areas of rivers and canals in Chennai will record the amount of precipitation and send the information to automatic weather stations. The common server then processes the data and computes the magnitude and probability of flood. In the event of predicted floods, Relief commissioner will be notified for evacuation and relief …show more content…
Established by Ministry of Environment and Forests of India in 1991, these are meant to protect the environment Coastal Regulation Zone includes land up to 500m from the high tide line (highest point the spring tide reaches) and a segment up to 100m from creeks, backwaters and rivers Coastal areas in Chennai is classified into three different categories: (i) Coastal Regulation Zone 1 - Areas which have to be protected as they are ecologically sensitive and important for biodiversity. New constructions are not permitted in these areas, (ii) Coastal Regulation Zone 2 - Areas that are already developed with buildings and infrastructure. Special regulations concerning the new and already existing development of these areas are made, (iii) Coastal Regulation Zone 3 - Areas without a special function and which are not part of both other zones. Repairs or reconstruction within this area is only permitted when local bodies authorize the
The mitigation measures have to address flood avoidance, flood tolerance, and flood resistance in an integrated way. The measures that are implemented and the new measures to be developed are meant to control causative factors like uncontrolled urban sprawl, loss of natural drainage, the inadequacy of the storm water drainage system, lack of maintenance of existing systems, increase in impervious surfaces and lack of coordination between stakeholders involved in implementing the measures. The measures could be broadly classified into structural and nonstructural measures. These measures include institutional, physical, socio- economic and environmental measures.
4.1 STRUCTURAL MEASURES
The structural measures …show more content…
The nonstructural measures fall within categories of institutional measures, socioeconomic measures, and environmental measures.
4.2.1 Institutional Measures
• Pre-monsoon meeting - Conducted annually by Corporation of Chennai, the meeting discuss at (i) how to clean drains (ii) how to evacuate the population before flooding (iii) how to supply food, shelter, and medical supply during the flood and (iv) how to deal with water stagnation after flooding.
• Early Warning System and Real Time Monitoring - This system involves real-time monitoring of rainfall. The entire Chennai Metropolitan Area (CMA) is mapped using Airborne Laser Terrain Mapping. The sensors installed in the catchment areas of rivers and canals in Chennai will record the amount of precipitation and send the information to automatic weather stations. The common server then processes the data and computes the magnitude and probability of flood. In the event of predicted floods, Relief commissioner will be notified for evacuation and relief …show more content…
Established by Ministry of Environment and Forests of India in 1991, these are meant to protect the environment Coastal Regulation Zone includes land up to 500m from the high tide line (highest point the spring tide reaches) and a segment up to 100m from creeks, backwaters and rivers Coastal areas in Chennai is classified into three different categories: (i) Coastal Regulation Zone 1 - Areas which have to be protected as they are ecologically sensitive and important for biodiversity. New constructions are not permitted in these areas, (ii) Coastal Regulation Zone 2 - Areas that are already developed with buildings and infrastructure. Special regulations concerning the new and already existing development of these areas are made, (iii) Coastal Regulation Zone 3 - Areas without a special function and which are not part of both other zones. Repairs or reconstruction within this area is only permitted when local bodies authorize the