Applications of Low Impact Development for Managing the Storm Water Surface Runoff in Urban Areas

Urbanization is one of the main important factors leading to urban flooding, which has caused major damage to the environment and society. Controlling urban flooding has become a new challenge for urban planners. There are many reasons of urban flooding in Delhi. It may occur due to increased urbanization, low rate of infiltration and poor infrastructure for storm water drainage network, improper drainage system. For controlling urban flooding, there is one of the control source solutions that help in reducing the urban flooding that is low impact development techniques. Low impact development (LID) is a new innovative technique for managing storm water at the source and helps to improve the water quality as well. It is most popular method which helps to reduce the hydrologic as well as water quality which effects by urbanization. The storm water management model (PCSWMM) is a widely used rainfall-runoff simulation model which has ability to model LID techniques. The LID used in this study is infiltration trench, green roof and rain water harvesting. The result obtained from the model (with LID) found to be satisfactory with the ground reality. In this present study, PCSWMM has been used for the first time for modelling storm water drains of the urban area (Delhi city, India), and the results obtained from simulation are in good consent with the observed data. Thus, the present study will help the flood managers to manage excess surface runoff during storm more efficiently in urban cities.