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- W2364754026 abstract "Quantitative research on urban soil and water loss is limited because of the complexity of the process and the lack of data accumulation.Nuclear tracer technology is quantitative and has a high resolution,which provides a unique method for understanding the mechanism of urban soil and water loss.A combination of 137Cs and 210Pbex tracing was applied to determine the background inventory of 137Cs and 210Pbex value and characteristics,agricultural soil erosion rate,distribution,and main factors that influence soil erosion in Shenzhen City.The results indicated that: 1) Disturbances from urbanization has greatly altered the natural properties of the surface soil in Shenzhen City.The background inventory of 137Cs in Shenzhen City ranged from 99 to 653 Bqm2,being highest in Shenzhen City Fairy Lake Botanical Garden at(653±81) Bqm2 and lowest in XinDaat(99±47) Bqm2.2).The background inventory of 210Pbex cumulative sedimentation increased with increasing altitude,which is attributed to the amount of the movement of water vapor in the subtropical marine monsoon climate in low-latitude regions.3) The steep sloped orchards farmland in NanAo and GongMing reservoir in Shenzhen City were seriously eroded,with average soil erosion rates as high as 6,150 and 40,530 t(km2·a),respectively.The agricultural soil erosion in Shenzhen City has a wide distribution area and exacerbated by severe human disturbance,with relatively concentrated runoff and sediment and severe erosion intensity.Land development and steep orchard caused by human disturbance were the main factors that influence urban soil and water loss.4) After nearly 30 years of reform and opening-up policies in Shenzhen City,the rapid urbanization accelerated the urban soil erosion.Therefore,projects for soil and water conservation should be implemented,such as returning steep slopes into forests and grasslands,and other ecological management reforms." @default.
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- W2364754026 date "2013-01-01" @default.
- W2364754026 modified "2023-09-26" @default.
- W2364754026 title "Characterization and Evaluation of Agricultural Soil Erosion in Shenzhen City Using Environmental Radionuclides" @default.
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