Dam impoundment elevates soil phosphorus and some trace elements in reservoir hydro-fluctuation belts

IF 2.3 4区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY
Dan Yang, Zongqiang Xie
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引用次数: 1

Abstract

To examine the role of dam impoundment in elevating the levels of soil-associated phosphorus (P) and trace elements in reservoir hydro-fluctuation belts (RHB), soil samples in RHB and adjacent uplands (non-flooded area, NFA) in the Three Gorges Reservoir, China, were collected and analyzed. Concentrations of available P, copper (Cu), chromium (Cr), and zinc (Zn) were found to be higher in RHB than in NFA (p < .05), whereas organic carbon was comparable in RHB and NFA (p > .05). The elevated levels of Cu, Cr, and Zn in RHB were probably associated the repeated drying–rewetting cycles created by the dam impoundment. The 95th percentile of the single-factor pollution index and geo-accumulation index in RHB were 1.29 and −0.21 for Zn, 3.21 and 1.15 for Cu and 3.37 and 1.17 for Cr. Elevated pollution potential of soil-associated Zn, Cu, and Cr existed in RHB of the Three Gorges Reservoir.

Core Ideas

Abstract Image

大坝蓄水提高了水库水位波动带的土壤磷和一些微量元素
为了研究大坝蓄水在提高水库水位波动带(RHB)土壤相关磷(P)和微量元素水平方面的作用,收集并分析了中国三峡水库RHB和邻近高地(非淹没区,NFA)的土壤样本。RHB中有效磷、铜(Cu)、铬(Cr)和锌(Zn)的浓度高于NFA(P<.05),而有机碳在RHB和NFA中具有可比性(P>.05)。RHB中Cu、Cr和Zn水平的升高可能与大坝蓄水产生的重复干燥-再湿润循环有关。RHB的单因子污染指数和地质累积指数的第95个百分位为:Zn为1.29和−0.21,Cu为3.21和1.15,Cr为3.37和1.17。
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来源期刊
CiteScore
3.70
自引率
3.80%
发文量
28
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