Super typhoon induced high silica export from Arakawa River, Japan
Super typhoon induced high silica export from Arakawa River, Japan
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DOI：
10.1007/s11356-020-09634-y
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发表时间：
2020-06-23
影响因子：
5.8
通讯作者：
Yamahira, Natsuki
中科院分区：
文献类型：
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作者：
Kubo, Atsushi;Yamahira, Natsuki
2018 年 10 月至 2019 年 10 月期间，在荒川河和污水处理厂 (STP) 测量了溶解硅酸盐 (DSi) 和颗粒二氧化硅 (PSi) 浓度。其中包括超强台风海贝斯之后的洪水观测。在正常水位下，STP 出水被发现是河流中 DSi 的最大来源。尽管洪水期间的DSi浓度（165 μ mol L-1）比常水位（221 μ mol L-1）下降了约25%，但PSi浓度（301 μ mol L-1）却比常水位（18 μ mol L-1）高出16倍多。 DSi和PSi的加载量（+/-1标准误差）分别为1.5×10（8）（+/-0.1×10（8））和0.15×10（8）（+/-0.02×10（8））摩尔年（-1），不包括台风海贝思的数据。 DSi和PSi淹水时的荷载量分别为1.2×10(8)(+/-0.1×10(8))和2.4×10(8)(+/-0.4×10(8))mol·15天(-1)。虽然普通水位下的二氧化硅负荷主要来自DSi，但由于DSi和PSi含量较高，洪水发生时二氧化硅负荷极大；而且高于年装载量。
Dissolved silicate (DSi) and particulate silica (PSi) concentrations were measured at Arakawa River and at sewage treatment plants (STP) during October 2018 to October 2019. These included flooding observations after super Typhoon Hagibis. At ordinary water levels, the STP effluents were found to be the largest source of DSi in the river. Although DSi concentrations during the flooding events (165 mu mol L-1) decreased by about 25% compared to that of ordinary water level (221 mu mol L-1), PSi was more than sixteen times higher value (301 mu mol L-1) compared to that of ordinary water level (18 mu mol L-1). Loading amounts of DSi and PSi (+/- 1 standard error) were 1.5 x 10(8)(+/- 0.1 x 10(8)) and 0.15 x 10(8)(+/- 0.02 x 10(8)) mol year(-1), respectively, excluding the data of Typhoon Hagibis. Loading amounts during flooding events of DSi and PSi were 1.2 x 10(8)(+/- 0.1 x 10(8)) and 2.4 x 10(8)(+/- 0.4 x 10(8)) mol 15 days(-1), respectively. Although the silica loading at ordinary water level was mainly derived from DSi, the silica loading during flooding events was extremely large due to both high level of DSi and PSi; moreover, it was higher than the annual loading amount.