Hydrology, Meteorology and Sediment Study of Upper Modi “A” and Upper Modi Hydropower Project

Hydrology, Meteorology and Sediment Study of Upper Modi “A” and Upper Modi Hydropower Project

Hydrology, Meteorology and Sediment Study of Upper Modi “A” and Upper Modi Hydropower Project

Project:  Upper Modi “A” and Upper Modi Hydropower Project

Assignment: Hydrology, Meteorology and Sediment Study of Upper Modi “A” and Upper Modi Hydropower Project

Location:  Kaski District, Nepal

Client: AF Consult Switzerland Ltd. in association with ITECO & TMS

Duration:  May 2018 to April 2019

Project Description: Upper Modi A HEP is RoR hydroelectric project located in Modi River of Kaski District. The installed capacity of the project is 42 MW with design discharge of 17.4 m3/s and gross head of 287.69 m.
Upper Modi HEP is proposed to be developed as a cascade of Upper Modi A HEP. The flow from tailrace of UMAHEP is diverted to UMHEP through interconnection arrangement/ The installed capacity of the project is 18.2 MW with design discharge of 17.4 m3/s and gross head of 133m.

Scope of Services:

1. Hydrological, Meteorological and Sediment Investigations
    a. Install manual rainfall station and operate for four monsoon months in the catchment area of the project;
    b. Water Level observation at three different locations (UMAHEP H/W & P/H and UMHEP P/H) in the project              area for 13 months in standard frequency;
    c. Monthly Discharge Measurement in UMAHEP H/W & P/H and UMHEP P/H for 13 months starting from May          2018-May 2019, maximum measured discharge 136.15 m3/s in August;
    d. Discharge Measurement of major tributaries (Chhane Khola and Ghatte Khola) during the dry months;
    e. Sediment sample collection by point sampler in H/W of UMAHEP from June to September;
    f. Laboratory Analysis (Sediment Concentration Analysis-123 samples, PSD Analysis -4 samples and Mineral            Content Analysis- 4 samples) of the collected sediment samples;
    g. Water Quality (Hardness) Test-13 samples; and
    h. Monthly and Final Reporting of the field works, analysis and laboratory test results.
2. Equipment Used:
    a. Current meter, sounding reel, fish weight and crane arrangement for discharge measurement;
    b. Rainfall Station for Rainfall observation;
    c. Membrane Filtration System for Sediment Concentration Analysis
    d. Trinocular Stereo Zoom Microscope for Mineral Content Analysis; and
    e. PSD Analyzer (0.4 to 2000 micron) for PSD Analysis.