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<p>Sharda Sahayak Canal Command has about 2,60,000&#xa0;ha area under waterlogging resulting in salt accumulation in surface and sub-surface soils. Monitoring of waterlogged salt-affected soils in Canal Command is important and quite necessary for agro-ecological planning and development of such salt-affected areas in order to increase land productivity. Geo-referenced soil samples at two depths (0–15 &amp; 15–30&#xa0;cm) were collected from 15 sites in Pratapgarh and 12 sites in Amethi districts of Uttar Pradesh. Analysis of the soil samples revealed that about 70% samples have pH &gt; 10 at both the soil depths in surface soil indicating that soils to be highly sodic in these two districts. Also EC &lt; = 4 was found in more than 60% samples indicating the non-salinity of the soils in both the districts. Sodium content ranged from 7.304 to 716.52 meq/l in saturation extract and generally decreased with increase in soil depth at all the sites indicating flushing of salts with canal water seepage. Sentinel-2B remote sensing data was downloaded for May 2023 and pre-processed, analysed using an open source software QGIS. Remote sensing images were classified for mainly five land uses and land covers (LULC): Vegetation/plantation, fallow/ bare land, water/ water bodies, built-ups/ sandy areas and sodic soils. Unsupervised method (ISODATA) of classification was applied and the accuracy assessment of LULC image was done with the help of ground check points. According to ISODATA classification, area under sodic soils was 11298.54&#xa0;ha (3.05%) and 17563.67 (6.38%) in Pratapgarh and Amethi districts, respectively.</p>

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Agro-ecological planning of waterlogged sodic soils in Sharda Sahayak Canal Command of Uttar Pradesh through geospatial technologies

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • R. H. Rizvi,
  • Sanjay Arora,
  • C. L. Verma,
  • R. K. Yadav

摘要

Sharda Sahayak Canal Command has about 2,60,000 ha area under waterlogging resulting in salt accumulation in surface and sub-surface soils. Monitoring of waterlogged salt-affected soils in Canal Command is important and quite necessary for agro-ecological planning and development of such salt-affected areas in order to increase land productivity. Geo-referenced soil samples at two depths (0–15 & 15–30 cm) were collected from 15 sites in Pratapgarh and 12 sites in Amethi districts of Uttar Pradesh. Analysis of the soil samples revealed that about 70% samples have pH > 10 at both the soil depths in surface soil indicating that soils to be highly sodic in these two districts. Also EC < = 4 was found in more than 60% samples indicating the non-salinity of the soils in both the districts. Sodium content ranged from 7.304 to 716.52 meq/l in saturation extract and generally decreased with increase in soil depth at all the sites indicating flushing of salts with canal water seepage. Sentinel-2B remote sensing data was downloaded for May 2023 and pre-processed, analysed using an open source software QGIS. Remote sensing images were classified for mainly five land uses and land covers (LULC): Vegetation/plantation, fallow/ bare land, water/ water bodies, built-ups/ sandy areas and sodic soils. Unsupervised method (ISODATA) of classification was applied and the accuracy assessment of LULC image was done with the help of ground check points. According to ISODATA classification, area under sodic soils was 11298.54 ha (3.05%) and 17563.67 (6.38%) in Pratapgarh and Amethi districts, respectively.