DESIGN OF GRAVITY WATER SUPPLY SYSTEM, PHEDI, TARAKESHWOR

Abstract

The final year project of a four-year bachelor’s degree aims to give students a smooth transition between the academic and professional worlds. It allows students to demonstrate a wide range of skills learned during the period of four years of study and put them into practice in real world applications. It encourages them to get involved in team work and learn to interact in a professional setting. We, a group of five students, undertook a water supply project entitled “Design of Gravity Water Supply System, Phedi Tarakeshwor” and completed the work by the end of the final semester.

The project area lies in Phedi of Tarakeshwor Municipality, Kathmandu of central region of Nepal. The area is surrounded by hills on three sides and by Kathmandu Metropolitan City on the remaining side. Currently, there are around 150 houses with a total population of 735. This project's primary goal is to design a water supply system that will suffice the water demand in the area. Design period of 20 years is taken with an annual growth rate of 1.846% (based on the census of 2038 to 2078). Daily demand of 110 lpcd is assumed considering institutions, farms, and health posts. AutoCAD software is used for drawing of the designed structures and EPANET software is used for analysis of pipe networks.

Surveying of the site, laboratory water tests, and design of spring intake sedimentation tank, filtration tank, reservoir tank and pipe networks with their estimation was done. The reservoir tank is designed based on the capacity calculated, considering an intermittent water supply system.