Abstract Portsmouth Harbour was used to investigate the effects of fresh water flow and water physio-chemical properties such as salinity on turbidity and dissolved oxygen within industrialised Macrotidal estuaries. Nine sites were selected within the harbour for field sampling and data collection based on their contrasting hydrodynamic environment and accessibility from land. Sediment, water samples and water physio-chemical data were collected from the harbour once every season over a period of two years. Fresh water flow directly affects turbidity as an increase in fresh water flow leads to a decrease in turbidity. Increasing fresh water flow also leads to seaward transport of Suspended particulate matter. There is no significant migration of the estuarine turbidity maxima zone within Portsmouth Harbour due to the general low fresh water flow (average yearly flow of 0.6 m3/s) for all seasons unlike other Macrotidal estuaries. The area of intertidal flats have low dissolved oxygen ranging from about 4.5 mg/L to 10.4 mg/L compared to other areas within the harbour which ranged from 6.5 mg/L to 12.5 mg/L. This is due to the substantial amount of sediment supplied by bed forms such as runnels on the intertidal flats into receiving waters. Based on these findings, there is need for a synchronised management system within these type of estuaries.

中文翻译：

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淡水流量和盐度对大潮口浅口浊度和溶解氧的影响：以朴茨茅斯港为例

摘要 朴茨茅斯港用于研究淡水流和水的理化特性（如盐度）对工业化大潮汐河口内的浊度和溶解氧的影响。根据对比的水动力环境和陆地可达性，在港口内选择了九个地点进行现场采样和数据收集。在两年的时间里，每个季节从港口收集一次沉积物、水样和水理化数据。淡水流量直接影响浊度，因为淡水流量的增加会导致浊度降低。增加淡水流量也会导致悬浮颗粒物向海方向迁移。由于与其他长潮河口不同，所有季节的淡水流量普遍较低（平均年流量为 0.6 m3/s），因此朴茨茅斯港内的河口浊度最大值区没有显着迁移。潮间带区域的溶解氧较低，约为 4.5 毫克/升至 10.4 毫克/升，而海港内的其他地区则为 6.5 毫克/升至 12.5 毫克/升。这是由于潮间带上的流道等床型向受纳水域提供了大量沉积物。基于这些发现，需要在这些类型的河口内建立一个同步的管理系统。4 毫克/升，而港口内的其他区域则为 6.5 毫克/升至 12.5 毫克/升。这是由于潮间带上的流道等床型向受纳水域提供了大量沉积物。基于这些发现，需要在这些类型的河口内建立一个同步的管理系统。4 毫克/升，而港口内的其他区域则为 6.5 毫克/升至 12.5 毫克/升。这是由于潮间带上的流道等床型向受纳水域提供了大量沉积物。基于这些发现，需要在这些类型的河口内建立一个同步的管理系统。