Derwent Estuary Ambient Water Quality monitoring program - Site U14

Site U14 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

作为德文特河（Derwent）环境水质监测计划的组成部分，Norske Skog公司每月对U14采样点实施采样。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流域至多28个监测点开展月度环境水质监测工作。本次监测由三支独立的船舶采样团队分别执行，但统一协调为每月同一天开展采样作业。在每个监测点，使用经校准的传感器原位测量水温、盐度、pH值、溶解氧及浊度；同时采用赛氏盘（Secchi disk）测定水体透明度。采集表层与底层水样，用于检测真色、总悬浮颗粒物（TSS）、总[原文缺失内容]及溶解性营养盐、有机碳与锌含量。在多数监测点，还会使用塑料管采集深度整合水样以检测叶绿素a含量。在河口中部与外河口区域，使用尼斯金采水器（Niskin bottle）采集底部样品；在上游河口监测点，则采用水泵完成采水瓶的灌装。所有水样均送至塔斯马尼亚分析服务中心（Analytical Service Tasmania）进行检测，该实验室为澳大利亚国家检测机构协会（National Association of Testing Authorities, NATA）认证实验室。各监测点的水深为2米。