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Delineation and characterization of waterlogging and salt affected areas in a canal irrigated semiarid region of north west India

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Title Delineation and characterization of waterlogging and salt affected areas in a canal irrigated semiarid region of north west India
Not Available
 
Creator A. K. Mandal a; R. C. Sharma
 
Subject Salt affected soils; Remote sensing; Waterlogging; Water quality
 
Description Not Available
Indian Remote Sensing (IRS) Linear Imaging Self Scanning (LISS II) data are
interpreted, followed by ground verification facilitated identification of
waterlogged areas (ponded water), salt affected soils (salt efflorescence) and
high water table zones (potential waterlogging zones) in the Indira Gandhi
Nahar Pariyojona (IGNP) command area (India). The false colour composites
(bands 4, 3, 2) for February 1996, November 1996 and June 1998 on 1:50 000
scale revealed occurrence and seasonal dynamics of permanent waterlogging in
low-lying flats and depressions. The extent of waterlogging was higher in
February 1996 due to less evaporation and more agricultural operation during
the period. Salt accumulation was higher in November 1996 due to freshly
precipitated seasonal salts. Seepage and accumulation of excess irrigation water
through coarse sandy mass was primarily responsible for the development of
waterlogging in the irrigated zone. The capillary rise of soluble salts with a
rising water table and high evaporative demand caused secondary soil
salinization. A ground truth study found areas with a high water table
(51.5 m) with patchy crop stands and a potentially sensitive zone with a
fluctuating (1.5–6.0 m) water table with poor vegetative growth. The soil
characteristics showed moderate to high soil salinity in the control section of
soil profiles. These were characterized by medium to coarse texture, weak to
moderately strong structure, weak consistency, low organic matter content and
the presence of abundant CaCO3 nodules. The composition of saturated soil
paste showed a preponderance of chlorides and sulphates of sodium, calcium
and magnesium. The presence of fine texture and calcium carbonate layers at a
depth below the surface caused the development of a perched water table
indicating unsuitability for traditional irrigated agriculture. The quality of
pond water was extremely poor and unfit for reuse. The ground water was
saline in some areas but normally lies within the prescribed limit. The quality
of drainage water was poor in saline depressions and unsuitable for reuse but
moderate in other areas suggesting its safe reuse when mixed with good quality
water. Suitable soil and water management practices were necessary for
sustainable crop production in the command area.
Not Available
 
Date 2019-12-06T11:26:41Z
2019-12-06T11:26:41Z
2008-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/28509
 
Language English
 
Relation Not Available;
 
Publisher Taylor and Francis