土地利用、水库沉积物中有机质、颗粒组分和金属络合的空间异质性

Q2 Environmental Science
T. Martins, Karen de Souza Ferreira, B. Rani-Borges, Ivan Edward Biamont-Rojas, S. Cardoso-Silva, V. Moschini-Carlos, M. Pompêo
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引用次数: 4

摘要

摘要:目的评价巴西圣保罗市Itupararanga水库的土地利用、粒径分布、有机质(OM)和易络合的金属定量。这种水生生态系统用于供水和发电,并不断受到人为影响,改变其物理和化学特性。方法在一次运动中,沿着水库从9个采样站收集地表沉积物(10厘米)样本,一式三份。采集采用“Lenz”型底部取样器。物理化学变量,包括金属铜、铬、锰、镍、铅和锌的量化,通过基本的描述性统计技术结合地质统计学和遥感的使用进行了评价。结果库区沉积物以有机质为主,水深直接影响OM浓度和粒度分布。因此,除铬外,在OM含量、粒度分数和金属元素等方面均表现出非均质性,且储层的三个区域之间存在差异。土地利用分类反映了环境保护区的真实情况,结果表明,中心区域受人为影响较大,而坝区金属含量较高,可能与水库周围的活动有关。结论库区水土流失问题表明伊图帕拉朗加环境保护局管理效率低下,需要各市之间的战略协调来加强水土流失保护。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Land use, spatial heterogeneity of organic matter, granulometric fractions and metal complexation in reservoir sediments
Abstract Aim This study aimed to evaluate land use, distribution of particle size fractions, organic matter (OM) and perform a metal quantification liable to complexation in the Itupararanga Reservoir (São Paulo, Brazil). This aquatic ecosystem is used for water supply and energy generation and is constantly subjected to anthropogenic impacts that alter its physical and chemical characteristics. Methods In a single campaign, samples of surface sediment (10 cm) were collected from nine sampling stations, in triplicate, along the reservoir. The collection was carried out with a “Lenz” type bottom sampler. The physicochemical variables, including the quantification of the metals copper, chromium, manganese, nickel, lead and zinc, were evaluated by basic descriptive statistics techniques combined with geostatistics and the use of remote sensing. Results All along the reservoir the sediment is predominantly organic and water depth interfered directly in the OM concentration and particle size distribution. Therefore, heterogeneity was observed regarding OM contents, particle size fractions and metals, with the exception of chromium, and the three zones of the reservoir proved to be distinct from each other. The land use classification showed the real situation of the Environmental Protection Area (EPA) and the results indicate that the central portion is more subject to anthropic impacts, while the dam region has high levels of metals, probably originated from the activities in the reservoir’s surroundings. Conclusions The soil erosion in the reservoir’s region shows the lack of efficiency in the Itupararanga EPA’s management, being needed a strategic coordination among the municipalities to enhance its conservation.
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来源期刊
Acta Limnologica Brasiliensia
Acta Limnologica Brasiliensia Environmental Science-Ecology
CiteScore
2.20
自引率
0.00%
发文量
17
审稿时长
50 weeks
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