BEHAVIOUR OF WATER QUALITY PARAMETERS DURING EBB TIDE IN DUNGUN RIVER ESTUARY, TERENGGANU
BEHAVIOUR OF WATER QUALITY PARAMETERS DURING EBB TIDE IN DUNGUN RIVER ESTUARY, TERENGGANU
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登嘉楼州龙运河口退潮期间水质参数的变化
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
M. Nik
中科院分区：
文献类型：
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作者：
S. Suratman;N. Faris;M. Nik
对敦贡河河口部分水质参数的行为进行了研究。在2001年10月期间，在类似的潮汐条件(落潮)下进行了两次采样，采集的样品作为盐度的函数，即沿着从0ppt(淡水末端)到31ppt(沿海水域末端)的盐度梯度。监测的WQ参数为一般物理参数(即WQ)。(温度、p h、溶解氧、悬浮固体和氧化还原电位)、溶解金属(铜、镉和铅)、溶解营养物质(基于氮和磷的营养物质)和叶绿素a。使用多参数数据记录仪现场测量物理水质参数，同时基于比色法进行营养物质和叶绿素a分析。在采用APDC-MiBk方法进行预浓缩步骤后，使用GFAAS技术对溶解金属进行分析。结果表明，大多数测量的参数似乎对盐度表现出非保守性。在营养物质方面，除硝酸盐表现出去除行为外，所有其他以氮和磷为基础的营养物质在河口都表现出添加行为。镉和铅在河口的行为也是非保守的，即观察到镉的正偏差，而铅则偏离理论稀释线。这些观察表明，河口是镉的来源，但也是铅的汇。手中的铜与盐度呈线性关系，表明沿河口的分布较为保守。研究结果清楚地显示了某一水质参数在河口的不同行为，也说明了顿贡河河口在改变河流向近岸水域输送过程中营养盐和金属浓度方面所起的重要作用。
a study has been carried out to determine the behaviour of selected water quality (WQ) parameters in Dungun river estuary. Samplings were carried out twice during october 2001 under similar tidal conditions (ebb tide) whereby samples were collected as a function of salinity i.e. along the salinity gradients from 0 ppt (freshwater end-member) to 31 ppt (coastal water end-member). WQ parameters monitored were the general physical parameters (viz. temperature, p h, dissolved oxygen, suspended solids and redox potential), dissolved metals (copper, cadmium and lead), dissolved nutrients (nitrogen- and phosphate-based nutrients) and chlorophyll-a. The physical water quality parameters were measured in situ using a multi-parameter data logger whilst nutrients and chlorophyll-a analyses were carried out based on the colorimetric method. Dissolved metals were analysed using gf-aaS technique following the pre-concentration step using aPDC-MiBk method. Results in general indicated that most of the parameters measured appear to behave non-conservatively with salinity. in the case of nutrients, with the exception of nitrate which exhibited removal behaviour, all other nitrogen- and phosphorus-based nutrients, exhibited addition behaviour in the estuary. Cadmium and lead were also found to behave in a non-conservative manner in the estuary i.e. positive deviation was observed for cadmium whilst lead exhibited a negative deviation from the theoretical dilution line. These observations suggest that the estuary act as a source for cadmium but a sink for lead. Copper on the hand exhibited a linear relationship with salinity indicating a conservative distribution along the estuary. Results obtained in the present study clearly show the different behaviour of a given water quality parameter in the estuary and also illustrate the important role played by Dungun River estuary in modifying the nutrient and metal concentrations during the transportation from the river to the coastal waters.