Topographical Survey Works of the Reservoir and HRT alignment for Lower Seti (Tanahun) Hydropower Project

Topographical Survey Works of the Reservoir and HRT alignment for Lower Seti (Tanahun) Hydropower Project

Topographical Survey Works of the Reservoir and HRT alignment for Lower Seti (Tanahun) Hydropower Project

Project: Lower Seti (Tanahun) Hydropower Project

Assignment: Topographical Survey
Works of the Reservoir and HRT alignment for Lower Seti (Tanahun) Hydropower Project

Location: Tanahun District, Nepal

Client: WAPCOS Limited & Nippon Koei Co. Ltd.

Duration:  December 2019 to January 2020

Project Description: Lower Seti (Tanahu) Hydropower Project is the storage type hydropower project with the capacity of 140MW with an estimated average annual energy generation of 587.7 GWh (Years 1-10) and 489.9 GWh (Year 11 onwards). The Project is situated on Seti river of Vyas municipality near Damauli, the district headquarters of Tanahun District. The waterway consists of 7.4 m diameter and 1,203m long headrace tunnel on the right bank for the river. An underground powerhouse measuring 27m wide x 46m high x 97m long will be built approximately 6 km (along the river course) downstream of the dam site.

Scope of Services:

1. Preparation of survey map by digital mapping of the ortho-rectified image and DTM of allocated project area;
2. Major feature extraction from the Ortho-rectified image;
3. Development of overall plan covering whole boundary of the project in 1:1000 scale with 5-meter contour interval;
4. Establishments of check control points for ground verification; and
5. Mapping and report preparation.
6. Equipment Used:
   • DGPS (3 Sets); and
   • Total Station (2 Sets)