Digital soil mapping to enable classification of the salt-affected soils in desert agro-ecological zones

Sheng, Jiandong; Ma, Lichun; Ping-an, Jiang; Li, Baoguo; Huang, Feng; Wu, Hongqi

doi:10.1016/j.agwat.2009.04.011

Cited by 37 publications

(22 citation statements)

References 20 publications

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“…Digital soil mapping can be used for the prediction of individual soil properties in large areas over space, generating maps in digital format in a rapid, effective, efficient and lowcost manner (Sheng, 2010). Severity of land degradation was shown in quantitative terms within the GIS environment using statistical analysis in ArcGIS.…”

Section: Digital Soil Mapping Using the Idw Interpolation Methodsmentioning

confidence: 99%

“…Severity of land degradation was shown in quantitative terms within the GIS environment using statistical analysis in ArcGIS. There are several interpolation methods such as Kriging (Sheng, 2010) and IDW that estimate cell values by averaging the values of sample data points in the neighbourhood of each processing cell. For the preparation of soil maps in the present study, IDW was used to estimate the variables pH, EC and alkalinity over space.…”

Section: Digital Soil Mapping Using the Idw Interpolation Methodsmentioning

confidence: 99%

“…Digital soil mapping was used for the prediction of spatial variability in individual soil properties in the study area, where maps could be generated in digital format in a rapid, effective, efficient, and low-cost manner (Sheng, 2010). Land degradation severity was shown as spatial distribution of pH, EC and alkalinity in quantitative terms via IDW interpolation methods using the statistical analysis tool in the ArcGIS software.…”

Section: Generation Of Soil Mapsmentioning

confidence: 99%

“…Digital soil mapping is critical when quantifying the relationship between soil types and their associated surrounding environment. Mapping soil characteristics allows the spatial distribution evaluation of physico-chemical properties and presentation in a form that users can deal with efficiently and interpret in a better way (Sheng, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Salinization is one of the most serious problems and occurs naturally in irrigated water and soil, particularly in semi-arid and arid regions. (Sheng, 2010). The groundwater irrigation practiced predominantly in the Bathinda district is one of the main factors of soil salinization, which in turn leads to land degradation (El Baroudy, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Assessment and monitoring of land degradation using geospatial technology in Bathinda district, Punjab, India

Ahmad

Pandey

2018

Solid Earth

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Abstract. Land degradation leads to alteration of ecological and economic functions due to a decrease in productivity and quality of the land. The aim of the present study was to assess land degradation with the help of geospatial technology -remote sensing (RS) and geographical information system (GIS) -in Bathinda district, Punjab. The severity of land degradation was estimated quantitatively by analyzing the physico-chemical parameters in the laboratory to determine saline or salt-free soils and calcareous or sodic soils and further correlating them with satellite-based studies. The pH varied between 7.37 and 8.59, electrical conductivity (EC) between 1.97 and 8.78 dS m −1 and the methyl orange or total alkalinity between 0.070 and 0.223 (HCO

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Section: Digital Soil Mapping Using the Idw Interpolation Methodsmentioning

confidence: 99%

Section: Digital Soil Mapping Using the Idw Interpolation Methodsmentioning

confidence: 99%

Section: Generation Of Soil Mapsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment and monitoring of land degradation using geospatial technology in Bathinda district, Punjab, India

Ahmad

Pandey

2018

Solid Earth

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Electrokinetic Restoration of Sulfate‐Accumulated Saline Greenhouse Soil

Cho

Kim

Yang

et al. 2011

CLEAN Soil Air Water

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Electrokinetic (EK) process was performed to restore sulfate-originated saline soil and to evaluate the effect of treatment duration. Sulfate and potassium were the major ionic salts in the saline soil used in this study. A constant voltage gradient of 1 V/cm was applied for 8, 12, and 16 days. After EK treatment, anions and cations were transported toward anode and cathode, respectively, by electromigration. Chloride was completely removed, and 85.6% of nitrate was removed after 8 days of treatment. The increase of treatment period from 8 to 12 days had a negligible effect on the enhancement in the rate of sulfate removal; however, over 70% was removed after16 days. At the end of experiment, the electrical conductivity (EC) of the soil, an indicator of soil salinity, decreased to 1.93 dS/m from an initial value of 5.3 dS/m, and the distribution of sulfate was similar to that of EC. The operation time of 16 days was sufficient to restore the sulfate-originated saline soil using the EK process.

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Spatiotemporal variations of soil salinization in China's West Songnen Plain

Wang

Mao

et al. 2023

Land Degrad Dev

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Preventing soil salinization and improving soil productivity play vital roles in achieving the Sustainable Development Goals (SDGs), the premise of which is understanding the spatiotemporal patterns of soil salinity in various ecosystems. To improve regional ecosystem management decisions, we examined the spatial variations and temporal changes of soil salinity in China's West Songnen Plain by separately developing prediction models of soil salinity for vegetated and nonvegetated areas (VEA and NEVA) through the combination of field samples, LAND-SAT series images, and the partial least square regression (PLSR) method. Twelve variables, encompassing spectral bands, vegetation, and soil salinity indices, were extracted from LANDSAT satellite images. Among the investigated variables, the enhanced vegetation index (EVI), red band, and digital elevation model (DEM) yielded the best results for assessing the soil salinity in VEA. In contrast, the green band and SI2 exhibited the most significant correlation with soil salinity for NEVA.Based on 10-fold cross-validation, models predicted soil salinity with R 2 values of 0.812 and 0.803. Results reveal that the salt-affected areas in the West Songnen Plain were estimated at 1.23 Â 10 6 hm 2 in 2016 with evident heterogeneous distribution. Intensively salt-affected area (IA) and moderately salt-affected area (MA) are mainly distributed in the low-lying central and northern regions of the plain. From 1991 to 2016, the salt-affected area experienced a rapid increase followed by a slight decline with a peak in 2000. This suggests effective soil amelioration due to ecological projects and a wetter climate, however, the salt-affected area still had a net increase of 0.32 Â 10 6 hm 2 . The variation of different saltaffected levels was characterized by an increase in slightly salt-affected area (SA), MA, and IA. Cropland was the dominant land cover type affected by soil salinization, with the affected area expanding from 0.39 Â 10 6 hm 2 in 1991 to 0.57 Â 10 6 hm 2 in 2016. MA and SA were the dominant levels of soil salinization in grassland, with MA expanding by 1.3-times from 1991 to 2016. Although the area of soil salinization increased from 1991 to 2016, the salt-affected area was reduced, and the salt-affected level was downgraded in some parts of the study area after 2000. These results could provide support for monitoring soil salinization in other regions, with the findings expected to benefit ecosystem conservation and

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Digital soil mapping to enable classification of the salt-affected soils in desert agro-ecological zones

Cited by 37 publications

References 20 publications

Assessment and monitoring of land degradation using geospatial technology in Bathinda district, Punjab, India

Assessment and monitoring of land degradation using geospatial technology in Bathinda district, Punjab, India

Electrokinetic Restoration of Sulfate‐Accumulated Saline Greenhouse Soil

Spatiotemporal variations of soil salinization in China's West Songnen Plain

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