Flood Modeling

FLOOD MODELING

Indira Gandhi International Airport is the primary international airport of the National Capital Region of Delhi, India. It is the busiest airport in India, with the commencement of operations at the new Terminal 3.Spread over an area of 5,220 acres (2,112 ha) of land, Delhi airport serves as the primary civilian aviation hub for the National Capital Region of India.

A  recent heavy rain  led to water logging at  IGI  airport  due to the poor drainage  systems causing   inconvenience  to  passengers  who waded  through knee deep water while the baggage handling system was left crippled. Geokno carried out the storm water modeling project to identify the problematic area and to propose a better mitigation plan.

The existing  drainage system on the IGI Airport  area consists of a series of open and closed drains. IGI Airport drainage system catchment area divided into two major categories namely  Northern Catchment and Southern Catchment.

Our storm water  experts  identified  the  locations in  the  existing  drainage system with high risk  of flooding  situation with  today’s  situation  in  a created  flood model  and  the  Land use/Land cover of existing drainage system catchment area along with catchment area statement was prepared.

The  hydraulic  analysis  was  done  to  calculate the accumulated inflow and outflow during the rain fall. The obtained results were accurate and replicating the on ground flood  situation.

FLOOD MODELING

THE MODEL WAS DONE FOR THREE RAINFALL EVENTS

 The mean value for 5 year return, one hour maximum rainfall = 55 mm.

 The mean value for 50 year return, one hour maximum rainfall = 88.4 mm.

 100 year return, 1 hour rainfall = 98.11 mm.

Geokno India Private Limited