International

High Resolution Mapping of abandoned/un-utilised mines Ranchi

The Earth and Water Centre of the University of Columbia had undertaken a demonstrator project for planning the utilization of abandoned/un-utilised mines in Jharkhand near Ranchi. The project envisaged developing water storage capacity in the area by
  • Developing the abandoned mines for storage.
  • Plan structures for water storage to prevent water run off, during the monsoon season.
  • To see how a water distribution system can be designed for the local area.The total area to be covered was around 60 sq kms. NECTAR partnered with the University to provide very high resolution Digital Elevation Models for the project area. Five centimeter imagery was acquired from UAVs. Using a combination of ground control points and 5 cm imagery, the team obtained horizontal accuracy of 10 cm and vertical accuracy of 12 cm on digital elevation models. Thereafter based on the high resolution Digital Elevation Models and the photographs, a three dimensional terrain model was developed for the area. Two major conclusions were drawn with these 3-D models terrain models:

    i. An assessment of the water holding capacity of the mines was drawn up.

    ii. Based on reports that the water stored in these mines would be potable, a complete distribution network was planned and designed.


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