Rejuvenation and Beautification of River and Nala

Abstract

Nowadays almost all water bodies in India are getting more and more polluted and facing with three major problems which are likely to be Untreated Sewage, Solid waste and abetting encroachment or slums areas along the bank of River, nala or any water body. Due to population development, outdated storm water drainage systems, climate change, and poor management of utility infrastructures, significant damage has recently been done to urban areas, including Hyderabad City, the capital of Telangana. One of the most practical methods to manage these complex urban systems is using process of Rejuvenation of the Nala and pollution abetment works by diverting the incoming Sewage leading to Nala in the Designed Sewerage Systems. In this research work, the framework is prepared for Rejuvenation of Polluted Nala channel and Designing Sewerage System for sewage outfall from the abetting slums including effective management of the nala system. This study is divided into three main parts which consists of 1. Contribution of Upstream Catchment area-Determination of the contribution of Catchment flow from Upstream to Confluence point of Nala and delineation of the Catchment area. 2. Nala Channelization- The Inlet flow has been intercepted and diverted to STP and total carrying capacity of Nala is found and check has been determined. 3. Design of Sewerage System- Determining the Sewage flow generation beside the Nala and four Inlets joining the Nala. For the first stage various Design Software like Civil 3D, Power Civil, Infraworks were used to simulate the existing catchment flow leading at the Confluence point then by using capabilities of QGIS 3.16.11 software application the Drainage networks, stream orders and elevation details has been achieved. In the Second stage the carrying capacity of storm water Nala is been determined by making calculation check for total of upstream flow, storm water flow and Inlet flows. Finally the third stage determines the generation of Sewage flow tapping and diverting it to the Sewer System by Designing and optimizing it in SewerGEMs select-series 4 Software which will get carried to the Sewage Treatment Plants, thereby treating the water as per CPCB-NGT norms. The proposed strategic approach is able to abate the pollution in Nala, maintain the ecological flow and conserve the public realm along the river.