Civil Insight: A Technical Magazine Volume 3 | Page 67

Tandon S.S. et al.
Civil Insight (2019) 64-70
2.3) Socio-economic survey
A socio-economic survey was performed by interviewing the local residents with generalized questionnaire
about the use of water mill, funding from the VDC, their potential expectation with the rehabilitation project
and their willingness to support upgraded watermill. The outcome was very positive with the villagers
showing their support to the rehabilitation project with manual labor work, financial assistance, and
commitment to optimally using the watermill and preserving it.
3) Data Summary from the Methodology
The data summary from the topographic, hydrologic and socio-economic surveys conducted of the given
site using are listed below:
x
x
x
x
x
x
x
River stretch = 400m (from intake)
Canal length = 350m
High Flood Level = 1.7m (Roshi River)
Mean river depth = 0.4m (Roshi River)
River slope = 1:50
Mean width of canal = 0.8m
x
x
x
x
x
Discharge in river = 0.210m 3 /s (Roshi
River; measured between May-August)
Gross head = 6.5m
Canal type: Earthen irrigation canal
Discharge in canal = 0.147m 3 /s
Current status of watermill: Functional
Number of grinders in watermill = 2
4) Power, Energy and Revenue Calculations
Considering 85% overall efficiency, 40% exceedance of discharge, 5% of head loss, and 20 operating hours,
the following results are obtained. To compute discharges of various months, MIP method was used.
8.33
16.67
25.00
33.33
41.67
50.00
58.33
66.67
75.00
83.33
91.67
100.00 2.95
2.45
1.59
1.22
0.58
0.43
0.36
0.31
0.21
0.21
0.16
0.11 0.31
0.21
0.16
0.11
0.21
0.36
0.75
0.75
0.75
0.75
0.58
0.43 15.92
10.87
8.04
9551.23
6088.70
4824.43
5.49
10.87
18.49
38.62
38.62
38.62
38.62
29.87
22.25
3401.82
6523.61
11465.80
23170.61
23170.61
23942.96
23170.61
18521.00
13351.21
33815.57
67
Wet
0.31
0.21
0.16
0.11
0.21
0.36
1.59
2.95
2.45
1.22
0.58
0.43 0.321
0.223
0.168
0.118
0.223
0.371
1.603
2.96
2.46
1.23
0.592
0.444
Jan
Feb
Mar
Apr
May
Jun
July
Aug
Sep
Oct
Nov
Dec
Total
(kWh)
Table 2. Energy table of Roshi River
133367.01