Exploring the ambient environment for charland formation in Rajmahal downstream Ganga river of Eastern India in post Farakka barrage Period

Autor: Swades Pal, Shahana Khatun, Somen Das
Rok vydání: 2018
Předmět:
Zdroj: Spatial Information Research. 26:337-346
ISSN: 2366-3294
2366-3286
DOI: 10.1007/s41324-018-0179-x
Popis: Up to 2005, more than 700,000 people and 53 villages of Malda and Murshidabad districts have been displaced and wiped out due to bank erosion of river Ganga. Population displacement due to massive river bank erosion and rehabilitation for them with livelihood options are the emerging challenge in both up and downstream of Farakka barrage. This paper also wants to find out potential areas of charland formation along with exploring existing charland over the selected phases. Normalized differences water index (NDWI) from 55 Landsat images is used for flow and charland mapping. Water presence frequency (WPF) and NDWI map are taken as parameters for mapping new habitat for chaland. Total existing charland area in phase 3 is 463.58 km2 and potential habitat for charland is 117.59 km2. Out of this potential area, in post monsoon season, 35.26% comes under highly potential zone where both depth of flow is very low and frequency of flow is irregular. Highly suitable area has been increased over the recent phases. Potential charland maps in 1st and 2nd phases are validated in reference to the appeared charland area in the successive phases. New charlands expectedly would be the resource hunting ground of the displaced people.
Databáze: OpenAIRE
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