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.\nSince 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. \nAt 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

作为德文特河环境水质监测计划的组成部分，Norske Skog公司每月对U14站点实施采样作业。自2003年起，Norske Skog博耶（Norske Skog Boyer）、尼尔斯塔特霍巴特（Nyrstar Hobart）及塔斯马尼亚州政府，已在德文特河口全域至多28个监测站点按月开展环境水质监测工作。本次监测由三支独立的船舶采样团队分头实施，但所有采样活动均协调安排在每月的同一天进行。在每个监测站点，研究人员使用经校准的传感器原位测定水温、盐度、pH值、溶解氧及浊度；同时采用塞氏盘（Secchi disk）测定水体透明度。研究人员采集表层与底层水样，用于检测水体真色、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。在多数站点，研究人员还会使用塑料管采集深度整合水样，用于叶绿素a的分析检测。在河口中段与外河段，研究人员借助尼斯金采水器（Niskin bottle）采集底层水样；而在河口上段站点，则采用泵体完成采样瓶的注水流程。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测试机构协会（National Association of Testing Authorities，NATA）认可的专业检测机构。本次监测的站点水深为2米。