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SPATIAL AND TEMPORAL VARIABILITY OF SOIL ACIDITY IN TYPICAL AREAS OF TAIHU LAKE REGION IN THE LAST 20 YEARS

Fucheng Liu

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Abstract

A geo-statistic method in combination with GIS was applied to characterize and map the spatial-temporal variability of soil pH in the typical area of Taihu Lake Region.The soil of the studied area appeared to be acid with about 85% of the total area showing a trend of decline in soil pH and its average decline extent being about 0.56 pH units.Since the Second Soil Survey,the soil pH spatial auto-correlation has become stronger and its auto-correlated distance has turned shorter,indicating that the soil pH distribution pattern has become complex.Based on the background information,it could be deduced that these changes had resulted from continual application of chemical fertilizers and large amount of acidic waste materials discharged from factories over last 20 years.

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What this paper is about

A geo-statistic method in combination with GIS was applied to characterize and map the spatial-temporal variability of soil pH in the typical area of Taihu Lake Region.The soil of the studied area appeared to be acid with about 85% of the total area showing a trend of decline in soil pH and its average decline extent being about 0.56 pH units.Since the Second Soil Survey,the soil pH spatial auto-correlation has become stronger and its auto-correlated distance has turned shorter,indicating that the soil pH distribution pattern has become complex.Based on the background information,it could be deduced that these changes had resulted from continual application of chemical fertilizers and large amount of acidic waste materials discharged from factories over last 20 years.

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Available abstract

A geo-statistic method in combination with GIS was applied to characterize and map the spatial-temporal variability of soil pH in the typical area of Taihu Lake Region.The soil of the studied area appeared to be acid with about 85% of the total area showing a trend of decline in soil pH and its average decline extent being about 0.56 pH units.Since the Second Soil Survey,the soil pH spatial auto-correlation has become stronger and its auto-correlated distance has turned shorter,indicating that the soil pH distribution pattern has become complex.Based on the background information,it could be deduced that these changes had resulted from continual application of chemical fertilizers and large amount of acidic waste materials discharged from factories over last 20 years.

Key concepts: Environmental science, Soil pH, Spatial distribution, Hydrology (agriculture), Soil survey, Spatial variability, Soil test, Soil science

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SPATIAL AND TEMPORAL VARIABILITY OF SOIL ACIDITY IN TYPICAL AREAS OF TAIHU LAKE REGION IN THE LAST 20 YEARS — Research Paper | ScholarLens