【摘要】 应用放射性同位素¹³⁷Cs和²¹⁰Pb测年法,在1985年枯水期测定了鄱阳湖的沉积速率。全湖21个取样点的沉积速率为0.5—7.0mm/a,平均为3.2mm/a。主湖区为1.0—3.2mm/a,平均为2.1mm/a。研究表明,各湖区之间、各取样点之间,沉积速率随水文、地理和地貌不同而有较大差异。还预测了鄱阳湖今后可能的演变趋势。更多还原

【Abstract】 Sedimentation rates of Poyang Lake were measured with radionuclide 137Cs and 210Pb dating method in the low water season in 1985. The sedimentation rate ranges 0.5-7.0 mm/a and the arithmetic average value is 3.2 mm/a at 21 sampling sites distributed over the lake. In the main region of the lake the sedimentation rate ranges 1.0-3.2 mm/a and the arithmetic average value is 2.1 mm/a. It was found that the sediment accumulation rate at different sampling sites and different regions of the lake varies with the hydrology, geography and geo-morphology of the lake. The evolution trend for Poyang Lake in the future is predicted.更多还原