Derwent Estuary Ambient Water Quality monitoring program - Site NN

Site NN is sampled monthly by Norske Skog 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

NN监测点由Norske Skog每月开展采样，作为德文特河环境水质监测计划的组成部分。
自2003年起，Norske Skog Boyer、Nyrstar Hobart与塔斯马尼亚州政府联合在德文特河口全域最多28个监测点实施月度环境水质监测。本次监测由三支独立的船基采样团队负责，但所有采样工作均协调在每月的同一天完成。
在每个监测点，均使用经过校准的传感器原位采集温度、盐度、pH值、溶解氧及浊度等现场监测数据；同时采用塞氏盘（Secchi disk）测定水体透明度。采集表层与底层水样，用于分析真色、总悬浮颗粒物（TSS）、总营养盐与溶解态营养盐、有机碳及锌含量。在多数监测点，还会使用塑料采样管采集积深水样以开展叶绿素a含量分析。河口中部及外域的底层水样采用尼斯金采水器（Niskin bottle）采集，河口上游监测点则通过泵体完成采水瓶的灌装。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测机构协会（NATA）认可的实验室进行检测分析。各监测点的监测水深为2米。