Derwent Estuary Ambient Water Quality monitoring program - Site E

Site E 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

E站点作为德文特河口（Derwent Estuary）水环境质量（Ambient Water Quality）监测计划的组成部分，由德文特河口项目组（Derwent Estuary Program）按月开展采样工作。
自2003年起，诺斯克斯科格博耶（Norske Skog Boyer）、尼尔斯塔霍巴特（Nyrstar Hobart）与塔斯马尼亚州政府，已在整个德文特河口区域内至多28个站点按月实施水环境质量监测工作。本次监测由3支独立的乘船采样小组分别开展，但所有采样作业均协调安排在每月的同一天完成。
在每个采样站点，均使用经校准的传感器对水温、盐度、pH值、溶解氧与浊度开展原位现场监测；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，用于真色、总悬浮固体（Total Suspended Solids, TSS）、总营养盐与溶解态营养盐、有机碳以及锌的分析检测。在多数站点，还会使用塑料管采集垂向积分水样，用于叶绿素a（Chlorophyll a）的检测分析。
在河口中段与外河口区域，采用尼斯金采水器（Niskin Bottle）采集底层水样；在河口上游站点，则通过泵体完成采水瓶的灌装作业。
所有水样均送至塔斯马尼亚分析服务实验室（Analytical Service Tasmania）进行分析检测，该实验室为澳大利亚国家检测机构协会（National Association of Testing Authorities）认可的合规实验室。本次监测的站点水深为2米。