CS(AR)-222 : Hydrological land use mapping of Narmada basin

Abstract

Among environment sciences, remote sensing is a science in which electromagnetic radiation sensors record images of the earth. Images are digitally analysed to get information. The incident radiation interacts with objects. Radiation is absorbed, reflected or transmitted. Leaf, soil and water has characteristic spectral reflectances. e.g., little visible light is absorbed and reflected and almost all infra red energy is absorbed by water. Image signature forms a basis for digital analysis of satellite digital data.

Here, a land use map is prepared for upper Narmada basin up to Jabalpur town. The areal extent of the basin is 17060 sq. km. It lies in Madhya Pradesh, India. The climate is tropical humid wet and dry. The sequential clustering digital technique is used on ERDAS software on IRS LISS I digital data. Spectral classes are assigned ground classes based on ground truth and spectral signature of objects. Collateral data in form of reports, data collected from ground truth and laboratory analysis are used to assign soil for land use classes. CN for these classes are assigned from standard tables.