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[1]CHEN Rui-ting,ZHANG Ming-li,YANG Hao.Dynamic Equilibrium Model of 210Pbex Background Value in Soil[J].Research of Soil and Water Conservation,2013,20(05):73-76.

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Dynamic Equilibrium Model of ²¹⁰Pb_ex Background Value in Soil

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 05 Page number: 73-76 Column: Public date: 2013-10-28

Title:: Dynamic Equilibrium Model of ²¹⁰Pb_ex Background Value in Soil

Author(s):: CHEN Rui-ting, ZHANG Ming-li, YANG Hao; College of Geography Science, Nanjing Normal University, Nanjing 210023, China

Keywords:: ²¹⁰Pb_ex background value; atmospheric settlement; annual precipitation

CLC:: S157.1

DOI:: -

Abstract:: Selection of background value point is directly related to the conclusion that is reliable or not in the process of estimating erosion rate by use of soil erosion model. If the background value can be calculated through scientific research, which will greatly improve the accuracy of the background value and is great significance of soil erosion study. In the background region, the soil is not affected by erosion and deposition, assuming that the atmospheric precipitation amount setting value. Based on the time scale of ²¹⁰Pb_ex sedimentation process for one year time scale, after n years later, the soil ²¹⁰Pb_ex settlement and the amount of ²¹⁰Pb_ex decay decrement achieve balance in this study. It is assumed that an average annual rainfall is constant in various regions. Research finds that correlation between ²¹⁰Pb_ex atmospheric subsidence flux and annual rainfall is extremely significant correlation(p<0.01). Regional annual precipitation becomes main factors affecting the amount of soil ²¹⁰Pb_ex. Because the annual rainfall is different around the world, the ²¹⁰Pb_ex content can reach the stability of the different values, so as to establish relationship model with annual precipitation ²¹⁰Pb_ex content in the soil. According to the ²¹⁰Pb_ex settlement continuity and stability, this research put forward to calculate the area of ²¹⁰Pb_ex background value through the regional average annual precipitation. According to the establishment of the soil ²¹⁰Pb_ex background value content dynamic equilibrium model, it provides a method of accurately determining ²¹⁰Pb_ex background value and has an important significance to regional soil erosion research.

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