Volume No. 4 Issue No.: 4 Page No.: 970-982 April-June 2010

 

SPATIAL ANALYSIS OF SOIL ALKALINITY AND STRUCTURAL STABILITY IN THE IRRIGATION COMMAND AREAS OF JALGAON, MAHARASHTRA (INDIA)

 

Harshika A. Kaul*1, Sopan T. Ingle and Sanjay B. Attarde2

1. Department of Environmental Sciences, Moolji Jaitha College, Jalgaon, Maharashtra, (INDIA)
2. School of Environmental and Earth sciences, North Maharashtra University, Jalgaon, Maharashtra, (INDIA)

 

Received on : November 11, 2009

 

ABSTRACT

 

In the past years, India’S agricultural development is as a result of rapid expansion of the irrigation and drainage infrastructure. But the low water use efficiency, in addition with soil characteristics, geology of the area, topography and bed rock types leads to soil salinity and alkalinity problems. Therefore in the present study timely and accurate detection and spatial distribution of alkaline areas and soil structural stability with their characterization and severity classification has been done to determine the suitability of irrigated production systems in three major and twelve medium irrigation command areas of Jalgaon district Maharashtra, (India). The current levels of soil alkalinity are measured as exchangeable sodium percentage (ESP). The sodic soils should have an ESP more than 5%. The soil structural stability (soil dispersion) is assessed by electrochemical stability index. The potentially dispersive soil should have an ESI value less than 0.05. Geographical information system and geostatistical technique (ordinary krigging) is used to spatially predict the soil sodicity and soil structural stability. The highest Exchangeable Sodium Percentage (37.41) is found in Girna Command Area at Vavada Village. According to the severity classification, out of three Major Irrigation Projects, Girna command area is found very high sodic whereas Hatnur command area is medium sodic. The study shows 50 % of the irrigation command areas of Jalgaon district are sodic affecting approximately 1219 Km2 area, approximately 2527 Km2 area is under degraded soil and the area under high risk zones of soil structural breakdown is approximately 5596 Km2, so utmost care have to be taken to ameliorate these areas and to avoid further development of sodicity and soil mechanical dispersion.

 

Keywords : Alkalinity, Exchangeable Sodium Percentage, Electrochemical Stability Index, Geographic Information System, Ordinary Krigging

 

 

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