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:: 6 Hydrology: Surface water, oceanography, coastal zone, ice and snow. Chairman: K. A. Ulbricht, Co-chairman: Mikio Takagi, Liaison: R. Spanhoff

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

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Satellite remote sensing of the coastal environment of Bombay. V. Subramanyan

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Structure type:: Chapter

Symposium on Remote Sensing tor Resources Development and Environmental Management / Enschede / August 1986 779 Satellite remote sensing of the coastal environment of Bombay V.Subramanyan Indian Institute of Technology, Bombay ABSTRACT: Remote sensing of the coastal environment of Bombay using the Landsat imagery (black and white and false-colour paper prints) makes it possible to trace the development and evolution of the coast. The coast is indented by many bays, promontories, creeks, tidal mudflats, stacks and beaches. It is thus one of rétrogradation. All the creeks follow lineaments and there is a triple junction of such lineaments to the east of Bombay. These clearly indicate the erosional development of the region by fluvio-marine processes. A reconstruction of the initial configuration of the Bombay region is attempted. Marshes, raised beaches and littoral concrete point to the emergence of the region in the past. The bays and headlands will be eliminated towards the end of the current marine cycle and the coast, straightened. Three rows of cuestas of volcanic rocks trending NNE-SSW with westerly dipslopes traverse the island lengthwise; there are three aligned lakes. 1 INTRODUCTION The Bombay coast, including that of the Salsette island to the north, forms a part of the Konkan Coast of the West Coast phy siographic division (National Atlas 1964)** The geomorphic environment of this coastal tract and the neighbouring Nhava-Sheva-Uran shoreline to the east was studied using the following data products of the Landsat: black and white paper print on MSS band 6 on the scale of 1:250,000 and false-colour composite paper print on MSS bands 4 (yel low) , 5 (pink) and 7 (blue) on the scale of 1:500,000. The images were further mag nified during the visual interpretation. Geological and geomorphological field traverses were undertaken in selected loca lities for the collection of ground truth. The topographical maps on the scale of 1: 63360 and the Town Guide Map of Bombay on the scale of 1:25,000 were also consulted for supplementary data. 2 SATELLITE DATA The black and white image brings out clear ly the configuration of the Bombay-Salsette coast and the Nhava-Sheva-Uran coast to the east. Three well-developed bays, namely, the Manori bay, the Mahim bay and the Back- bay and the broad embayment between Versova and Juhu show up along with their corres ponding promontories (Fig.1). Sandy beaches can be readily recognised by the white tone around Manori, Versova, Juhu, Bandra and Girgaon. Rocky beaches with boulders, cobb les and gravels as well as wave-cut plat forms can be identified at other places along the coast by the pale grey tone. The cuestas bordering the three lakes and con tinuing farther north display a light and shade effect on their escarpments and dip- slopes. The morphological signature of the cuestas south of the Powai lake is a faint grey line whereas in the Kanheri Hills in the northern part of the island, the cues tas occupy a considerable area - about 25 sq. km. The big c uesta at the centre of the Figure 1. A Landsat view of the Bombay-Salsette island and the neighbouring country to the east and southeast on MSS hand 6. The coastal and inland features show up very well. Trombay island in the east also shows up as a thick grey line. The mudflats that have formed in the tidal zone between the low and the high tides are readily recognised by their dark grey tone and their locations around the creeks. The lakes and the creeks appear black whereas the marshes in the Mahim and Chembur areas appear as medium grey patches. The basalts are seen as pale grey areas in the Bombay island while the trachytes, rhyolites and tuffs in the Salsette island appear much paler. The salt fields have registered themselves as white streaks, ex pectedly. The urban, suburban and vegetated areas show a light grey tone. The false-colour composite facilitates the

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