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Lineament control on channel behaviour during the 1990 flood in the southeastern Thar Desert

1994; Taylor & Francis; Volume: 15; Issue: 13 Linguagem: Inglês

10.1080/01431169408954263

1366-5901

A. Kar,

Groundwater and Watershed Analysis

Abstract A number of lineaments cross the Luni – Jawai plains of the Thar Desert in India. Many of these had been suspected to control the present day channel processes, but this remained to be tested as the streams in the region are ephemeral. Stream flow takes place in response to good monsoon rainfall, but is short-lived. An analysis of the IRS false colour composite prints of the area, taken after the floods of July and August, 1990, provided supportiveevidence for the neotectonically-controlled current channel processes. The streams behaved as they were expected to on the tectonically-controlled fault blocks. A few hitherto uncharted palaeo-channels became revived during the flood and provided more insight on the subject.