Derwent Estuary Ambient Water Quality monitoring program - Site RBN

Site RBN is sampled monthly by the Derwent Estuary Program as part of the Derwent Ambient Water Quality monitoring program.Since 2003, ambient water quality monitoring has been carried out on a monthly basis at up to 28 sites throughout the Derwent estuary by Norske Skog Boyer, Nyrstar Hobart and the State Government. Monitoring is carried out by three different boat-based sampling parties, but is co-ordinated to occur on the same day each month. At each site, in-situ field measurements are taken using calibrated sensors for temperature, salinity, pH, dissolved oxygen and turbidity. Water clarity is also measured using a secchi disk. Surface and bottom water samples are collected for analysis of true color, total suspended solids(TSS), total and dissolved nutrients, organic carbon and zinc. at most sites, depth integrated samples are also collected for chlorophyll a using a plastic tube. Bottom samples in the Middle and Outer estuary are collected using a niskin bottle. Pumps are used in the upper estuary site to fill up the bottles. All water samples are analysed at Analytical Service Tasmania, a National Association of Testing Authorities-accredited laboratory. Monitoring site depth is 2 meters

RBN站点由德文特河口计划（Derwent Estuary Program）作为德文特环境水质监测计划的组成部分，按月开展采样工作。自2003年起，Norske Skog Boyer、Nyrstar Hobart与塔斯马尼亚州政府已在德文特河口至多28个站点按月实施环境水质监测。该项监测由3支不同的乘船采样团队负责开展，但协调为每月同一天完成所有站点的采样。在每个监测站点，均使用校准后的传感器原位测定温度、盐度、pH值、溶解氧及浊度；水体透明度亦采用塞氏圆盘（Secchi disk）进行测量。采集表层与底层水样，用于分析真色、总悬浮颗粒物（TSS）、总态与溶解态营养盐、有机碳及锌。多数站点还通过塑料管采集深度整合水样，用于叶绿素a（chlorophyll a）的分析。中河口与外河口的底层水样采用尼斯金采水器（Niskin bottle）采集，河口上游站点则使用泵体完成采水瓶的装填。所有水样均送至塔斯马尼亚分析服务中心（Analytical Service Tasmania）——一家获得澳大利亚国家检验机构协会认可的实验室——进行分析。本次监测的站点水深为2米。