Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

damen, m. c. j.

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Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856641294

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: IX Seiten, Seiten 551-956

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A,. A. Balkema

Identifier (digital):: 856641294

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(26,7,2)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Damen, M. C. J.

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: 5 Non-renewable resources: Geology, geomorphology and engineering projects. Chairman: J. V. Taranik, Liaison: B. N. Koopmans

Write comment:: Wegen zu enger Bindung kommt es teilweise im Original zu Textverlust.

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Application of stereo-terrestrial photogrammetric technique to varied geoscientific investigations. N. K. Agarwal

Document type:: Multivolume work

Structure type:: Chapter

553 Figure 2. Terrestrial stereo-pair of left abutment of Supa Dam, a - excavated weathered basic dyke, x-x' fold axis, b - shear zone. 200m deep gorge section of Kali river at Supa, Karnataka. The left abutment of the Dam formed an escarpment in the upper portion (Fig.2). Being inaccessible it could not be mapped by conventional methods. Utilizing terrestrial photogrammetric technique maps of the area could easily be prepared on 1:500 scale with a contour interval of 5 m. Various significant geological details that could be mapped out included weathered basic dykes, promi nent shear zones and joint planes, traces of bedd ing, faults and joints, and attitude of planar surfaces. Folding pattern of the rocks was well deciphered by correlating precise levels of the fold axes on the left and the right abutment areas (Agarwal 1985). Thus terrestrial photogrammetry not only made it possible to accurately map an inaccessible zone but also helped in the expeditious completion of the geological exploration. 3.2 Geo-environmental study of Coconut island Coconut Island off the west coast of India in the Arabian sea, has been declared as a 'National Geolo gical Monument' for preservation of its natural exposures of columnar lava. The Island exhibits highly irregular topographic features marked by conspicuous scarps. This coupled with the remoteness and accessibility constraints rendered accurate mapping of the island through conventional methods a tedious preposition. In this case also, terres trial photogrammetric technique was applied to map an important portion of the island on 1:500 scale with a contour interval of one metre. The area was mapped with the help of three stereo-pairs taken from three sides of the island. Apart from topographic map, a geo-environmental map of the area was also prepares simultaneously. Various geo-environmental features recognised include wave cut platform, dissected marine terraces, scarps, sea side cliffs, gently sloping surface, stacks, master joints, sandy and shingle beaches, bushes and tree covered areas (Agarwal & Srivastava 1982) The island exhibits a conspicuous erosional regi me. A comprehensive geo-environmental evaluation of the area could easily be brought out with the help of the stereo-pairs. 3.3 Glacier mapping Under International Hydrological Programme, a long term » detailed glaciological study was initiated on a glacier in NW Himalayas. The existing large scale map of the glacier was on 1:50,000 scale only. An accurate, large scale topographic base map of the glacier was required for the project. It was rather impossible to prepare the same through the conventional plane table or theodolite survey, mainly on account of following : i) inaccessibility of many portions of the glacier, especially the upper reaches, ii) large survey time required, during which period the glacier surface would have modified due to ablation and glacier movements, and iii) rugged and dissected nature of lower portion of the glacier requiring considerable interpolation and consequent generalisation. Taking recourse to terrestrial photogrammetric technique an accurate large scale topograpnic map of the glacier could easily be prepared on 1:5000 scale with a contour interval of 10m. Five stereo- -pairs taken from vantage points selected around the lower portion of the glacier were used for the purpose. A photo-interpreted glaciological map was also prepared simultaneously showing mora ine ridges, bergschrund, transient snowline, supra- glacial channels, ice faces, crerasses and ice falls. Results have clearly brought out that terrestrial photogrammetry is the most appropriate technique for glacier mapping. 3.4 Nilgiris landslide investigation Nilgiris district of Tamil Nadu was ravaged by numerous landslides on an unprecedented scale, causing considerable damage to life and property, following heavy rains during the winter monsoon of 1978-79. This necessitated a quick appraisal of the affected areas. As the conventional survey technique is a time consuming process, terrestrial photogrammetry was resorted, initially to map four important landslides in the area. The maps were prepared on 1:500 or 1:2000 scale with contour

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