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Hydro power assessment for small ungauged catchments in Himalayan region using GIS techniques
Data to
be Used for the StudyTo develop the modified regional flow duration
model for ungauged catchments and to update the database of Small Hydro
Potential Sites in Himachal Pradesh, following data are being collected by this
centre for the gauged sites
- Physiographic characteristics of Catchment Name, Geographic location,
Catchment area, Altitude of gauging station, Mean & maximum altitude of
catchment, Influence of ice/snow/glaciers, Catchment map/drawing., Stream
network in catchment area, portion of catchment which is forest or under
glacier, area of catchment covered by snow (mean of maximum snow cover)
- Meteorological Data Time-series of river flow data (daily or l0-daily),
monthly precipitation, temperature, solarity, relative humidity and wind speed
for all meteorological station with altitude of station
- Areal climatology Digital or paper maps of monthly/seasonal/annual
precipitation, evaporation, temperature, snow cover, relative humidity,
solarity, wind direction etc.
- Digital Terrain Model data (DTM) Digital Terrain Data for Himachal Pradesh
(Longitude 75O-79 O 10' and Latitude 30 O - 34 O) is being procured from SPOT
Image Corporation U.S.A. which shall have 305 m elevation posting in a grid data
structure. Digital Terrain Models shall be used for computation of slope,
channel length, area of catchment, head available for power generation and
location of suitable sites for civil structures of small hydro power projects
such as Diversion Weir, Feeder and Head Race Channel, Desilting Tank, Forebay
Tank, Power House Building etc.
Repetitive satellite data for these
catchments may be effectively used to locate the region of deforestation and
impact of small hydro projects development on forest in the catchments. The
sites in deforestation regions may be considered as potential sites for hydro
power station to control the deforestation to a larger extent.
- Transmission Line Network Data It is proposed to integrate the existing 11
kV transmission line network with small Hydro Potential Sites. This information
will have a bearing on priority of sites selected for development as for those
sites which are close to existing transmission line network, expenditure on
laying and maintenance of transmission line from small hydro project upto the
existing network will be reduced considerably
- Other Data Geology, Hydro-Geology, Soil Cover and Land Use and other
parameters are to be related with modified flow duration curves
The
Gee-Graphic locations of gauged sites have been shown in Fig.l. Some of the sites forming a
cluster have been shown in fig. 2.
 Fig.l.
 Fig.2.
ConclusionDevelopment of small hydro projects in remote places of
hilly area will enhance the quality of life in these areas. Development of
regional flow duration model and Small Hydro Potential Sites Database will
enable to plan for Hydro-Power Development on a sound scientific basis. This
will help in bringing the prosperity to the area in particular and region in
general. Development of Small Hydro Schemes will also help in reducing the
migration from these areas and reduce the dependency on forest and fossil fuel
products which are being used to meet the energy needs. The efficient Small
Hydro Potential Sites in GIS environment will hasten the process of planning and
implementation of small hydro projects for which private sector has shown a
considerable interest. References
- "Pre-Investment Study of New and Innovative Small Hydero Options", prepared
by Alternate Hydro Energy Center for Indian Renewable Energy Development Agency
Ltd., Ministry of Non- conventional energy Sources, Govt. of [ndia-1999
- "Development of Regional Flow Duration Models", developed by Alternate Hydro
Energy Center in Collaboration with Department of Earth Sciences, Centre of
Remote Sensing, University of Roorkee, under UNDP-GEF Hilly Hydro Project,
Ministry of Non-Conventional Energy Sources, Govt. of India-1998
- Brochure for Entrepreneures, issued by Himurja and HPSEB, Himachal
Pradesh-1998
- India's Electricity Sector - Widening Scope for Private Participation, 4th
Edition, issued by-Ministry of Power Govt. of India - Sept. 1998
- "GIS" in Small Hydro Planning Resource Management", By Arun K. Saraf,
Department of Earth Sciences and Arun Kumar, Alternate Hydro Energy Centre,
University of Roorkee, journal on GIS Development, Sept.-Oct., 1997
Table-1: Small Hydro Schemes
for Private Sector Investment
| State |
Total Identified |
Alloted |
Under Allotment |
| |
Projects |
Capacity (MW) |
Projects |
Capacity (MW) |
Projects |
Cpacity (MW) |
| Andhra Pradesh |
17 |
91.5 |
17 |
91.15 |
- |
- |
| Tamil Nadu |
70 |
156.95 |
3 |
10.90 |
- |
- |
| Karnataka |
166 |
444.40 |
39 |
272.90 |
- |
- |
| Orissa |
14 |
195.70 |
- |
- |
- |
- |
| Kerala |
65 |
203.08 |
8 |
76.50 |
48 |
105
50 |
| Uttar Pradesh |
11 |
104.28 |
3 |
25.78 |
8 |
78.5
0 |
| Madhya Pradesh |
93 |
158.80 |
13 |
22.95 |
80 |
135
85 |
| Punjab |
22 |
19.40 |
- |
- |
22 |
19.40 |
| Himachal Pradesh |
137 |
200.00 |
54 |
69.89 |
83 |
130.11 |
| Total |
595 |
1,573.70 |
137 |
570.07 |
241 |
468.86 |
Table 2: Category of Potential Sites in Himachal Pradesh
|
Capacity |
No. of Sites
Identified |
Head Range (m) |
|
<30 |
31-50 |
51-100 |
101-300 |
>300 |
|
No. of Sites |
|
0-50 |
|
|
|
|
|
|
|
51-100 |
5 |
5 |
|
|
|
|
|
101-500 |
43 |
43 |
|
|
|
|
|
501-1000 |
41 |
41 |
|
|
|
|
|
1001-3000 |
77 |
52 |
2 |
9 |
14 |
|
|
Above 3000 |
150 |
|
|
23 |
111 |
16 |
|
Total |
316 |
141 |
2 |
32 |
125 |
16 |
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