FLOOD CONTROL IN BANGLORE CITY FOR SUSTAINABLE DEVELOPMENT: A CASE STUDY

ABSTRACT Bengaluru, the state capital of Karnataka undergoes flooding every year during monsoon. The reason for floods is due to depletion in storage capacity of water bodies (lakes). The depletion is due to the deposition of enormous amount of sediment at the bottom of the lakes. One of the solutions for this problem would be De-Siltation of lakes (Removal of sediments). Desiltation of a lake can be carried out by a process called Dredging. However, huge quantity of dredged material (sediments) is resulted from this process which is generally considered as waste and requires special handling. Further, dredged sediment (DS) cannot be used for construction because it exhibits high water content, high compressibility and low strength. This paper aims to reuse such DS as a sustainable material for construction activities in an economical way. To justify this, Hebbal Lake has been selected as a case study, which is one of the biggest lake in Bengaluru city. However, in the present study, attempts were made to stabilize the DS for uses such as embankment construction, subgrade construction and filling material. DS is stabilized using Granite Dust (GD) and Air-cooled Blast Furnace Slag (ABS) respectively, to improve its geophysical properties. Also, the stabilized sediments are characterized for its properties and it is concluded that these sediments after stabilization satisfy the required properties of construction material.