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日本琵琶湖沉积物中磷的释放量是随强风 (例如台风 )以及接近底部的氧气消耗而增加。为了研究这个过程 ,我们于 1 997年至 1 999年的夏初和夏末收集了沉积物芯样。通过对孔隙水中的硫酸盐、硝酸盐成份和沉积物中的易挥发性酸性硫酸盐成份的测试所反映出的沉积物中氧化过程的变化表明有很大的季节性和空间分布的差异性。在 1 997年和1 999年测试的硝酸盐和硫酸盐所反映的沉积物氧化过程主要出现在湖盆深水处的北端。沉积物中最大酸性浓度的位置分布在深水中 ,其位置的变化表明最大磷溶解量的空间位置可能随年度而改变
Phosphorus releases from Biwako Sediments in Japan increase with strong winds, such as typhoons, and oxygen consumption near the bottom. To study this process, we collected sediment cores from early summer and late summer of 1997 to 1999. Changes in the oxidation process in the sediments, as evidenced by tests of sulphate, nitrate components and volatile acid sulphate components in sediments, show a large seasonal and spatial variability. Sediment oxidation as reflected by nitrate and sulfate tested in 1997 and 1999 mainly occurs at the northern end of the deep lake basin. The location of the maximum acid concentration in the sediments is distributed in deep water and the change in location indicates that the spatial location of the maximum amount of phosphorus dissolved may change with year