Identification
Introduction
Watershed
management is scientific approach and now has become a medium of Central and State
Governments for planning of rural development schemes. It includes conservation,
development and optimum utilization natural resources like soil, water, vegetation,etc. to
reduce soil erosion, moderate floods, alleviate drought, improve water availability for
increasing food, fodder, fuel, timber and fibre production on sustainable basis. Besides,
it also helps in employment generation, development of human and other economic resources
of village to promote savings and income generating activities. In India, watershed
development project is taken up under various programmes launched by the Government of
India. The main aim is to manage the land and water resources for sustained production.
Identification
Identification
of watershed is started by project implementing agency (PIA) level by involving all
Government departments, people representatives, etc. The criteria of watershed selection
depend on overall protection and improvement of watershed resources. Areas suffering from
severe soil erosion, acute shortage of water for drinking/irrigation, sedimentation
problems and having large population of scheduled castes, scheduled tribes, predominance
of wasteland etc. are generally given priority.
Water Shed
Boundary
First and
foremost, the toposheet that gives the detailed of contour, drainage system, etc. of
selected area is obtained from respective departments. The boundary of watershed is
delineated on toposheet and then enlarged to appropriate scale, e.g. 1:5000 or 1:2500 for
more detail. In addition to this, cadastral/revenue map showing the land-holding of the
area is obtained from Panchayat/collectorate of respective area. The cadastral map is
reduced/enlarged as same scale as watershed map, and then superimposed on watershed map to
get field boundaries of individual farmer within watershed boundary. In absence of these
maps, sketch map of the watershed is developed. The sketch map should include all major
physical features including drainage lines, existing structure etc. |
Ag.
Technologies
(Agricultural
Engineering)
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