Reprint - Central Arid Zone Research Institute

and parabolic have been discussed. The morphologicalcharacteristics of the longitudinal and parabolic dunes of Jodhpurdistrict such as the height, length, width and slopes vary from 10 to65 m; 500 to 600 m; 200 to 450 m and 4° to 22° , respectively. Thesedunes constitute more than 80% fine sand and their water holdingcapacity varies from 20.0 to 26.3%, while organic carbon varies from0.03 to 0.13%. These dunes are well supplied with Fe, Zn and Cu butare deficient in Mn.136 Singh, S. and Shankarnarayan, K.A. (1982)Application of LANDSAT digital analysis in geomorphologicalinvestigations of the middle Luni basin, Rajasthan. Annals of AridZone. 21: 279-287Digital analysis of LANDSAT imagery in the form of computercompatible tapes has been found useful in geomorphologicalinvestigations of the middle Luni basin in western Rajasthan. Fivesubscenes selected from two LANDSAT scenes have been digitallyclassified into different themes (landforms) quickly and accurately.The spectral variations within each theme has been detected whichcould not be identified from visual interpretations of LANDSATimagery. Quantitative data on the number of pixels, area andpercentage has been computed for each theme. It has beenconcluded that the multispectral digital analysis of the LANDSATdata by using interactive mutispectral image 100 system is usefulfor geomorphological investigations because the error in theidentification and classification of the themes could be checked andcorrected simultaneously.137 Singh, S. and Shankarnarayan, K.A. (1982)Role of remote sensing in the appraisal of natural resources for thedevelopment planning of the Indian desert. Transactions of theIndian Society of Desert Technology. 7: 84-90Role of remote sensing in the appraisal of the natural resources forthe development of different regions in the Rajasthan desert hasbeen discussed in the present paper. Visual analysis of the aerialphotographs and LANDSAT imageries in conjunction with groundtruth has enabled to evaluate various natural resources viz.,landforms, soils, vegetation and water resources. Digital analysis ofthe resources will ultimately form a sound basis for the rationalregional development planning.138 Singh, S. and Shankarnarayan, K.A. (1986)Dynamics, morphology and management of sand dunes in the greatIndian desert. Current Practices in Geotechnical Engineering. 3:23-47