Global area affected by soil salinity map
WebOct 20, 2024 · In total, there are more than 833 million hectares of salt-affected soils around the globe, or 8.7 per cent of the planet. Most of them can be found in naturally … WebDec 3, 2024 · More than 833 million hectares of soils are already salt-affected, representing around nine per cent of the world’s land surface, or roughly four times the size of India. Salt-affected soils occur in all continents, and under almost all climatic conditions, but more than two-thirds are in arid and semi-arid zones.
Global area affected by soil salinity map
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WebDec 22, 2024 · Variations in the total area of salt-affected soils between 1980 and 2024 at the continental level. (A–F) Variations in the total area of soils with salinity of EC e ≥4 dS⋅m −1. (G–L) Variations in the total area of soils with sodicity of ESP ≥6%. Red lines show the low-pass-filtered (5-y running window) variation of the annual salt ...
WebDec 14, 2024 · A global analysis of the Earth over 40 years by satellite data and machine learning showed that out of the 120.4 M km 2 of non-frigid land, 9.7% is affected by salinity. This area is not small as ... WebOct 6, 2024 · Around 6.74 million ha area in the country is salt-affected. Estimates suggest that every year nearly 10% additional area is getting salinized, and by 2050, around 50% of the arable land would be salt-affected. Saline soils occupy 44% area covering 12 states and one Union Territory, while sodic soils occupy 47% area in 11 states.
WebOct 1, 2024 · Soil salinity might have severely affected the growth of the vegetation, and from the NDVI map, the soil of the Barguna Sadar area is severely affected by the salinity. Through the Normalized Difference Vegetation Index (NDVI), which is used to express the health of the vegetation, the remote sensing data supplied quantitative information on ... WebNov 29, 2024 · Salt contamination, which leads to stunted and uneven plant growth, is already estimated to affect 20 percent of cultivated land worldwide. Climate change drives soil salinization in several ways ...
WebSep 15, 2024 · The only database that currently provides soil salinity data with global coverage is the Harmonized World Soil Database, but it has several limitations when it comes to soil salinity assessment. ... The validation accuracy of the resulting maps was in the range of 67–70%. The total area of salt affected lands by our assessment is around …
WebApr 13, 2024 · Total unvegetated area was estimated for all NAIP images and the 2016 WorldView-3, and 2024 PlanetScope satellite images. We visually inspected the coordinates of vegetated and unvegetated points (median observations per year: 218) using high-resolution images at a scale of 1:500 to 1:1000 in QGIS 3.16.5 (QGIS.org, 2024).Raster … geotech lab testingWebSoil salinity is a major agricultural problem in global crop production [], and it has accounted for approximately 20% of the world’s cultivated area [].Furthermore, soil … geotech launcestonWebApr 29, 2024 · The global coverage area of salt-affected soils is around 1060.1 million ha [10]. Salinity was reported on 1518722 ha of the land in Turkey, and saline soils constitute 5.48% of the total ... christian targetWebTwo major data sources are available to delineate areas at risk of salt accumulation in Europe: The European Soil Database (ESDB, 2004) and the map of salt affected soils in Europe compiled by Szabolcs (1974). … geotech land surveyingWeb2 days ago · Most of the study area was lightly affected by salinity. Around 30% of the study area was moderately affected, and the heavily affected areas were sporadically scattered across the study area ... geotech landscaping fabricWebJan 31, 2024 · In past 25 years, rise in sea levels has resulted in 33% increase in salinity level in coastal areas (Rahman et al., 2024). Recent data have revealed that 1125 million hectares of land area in the ... christian tarotWebSep 28, 2024 · The extent of salt-affected soil (SAS) covers a significant land area of global earth ~932.2 Mha (Rengasamy 2006). This problem is further aggravated with the … christian tarot book