Derwent Estuary Ambient Water Quality monitoring program - Site LB

Site LB is sampled monthly by the Derwent Estuary Program 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站点LB由德文特河口项目（Derwent Estuary Program）作为德文特河口水环境质量常规监测计划的组成部分，开展月度采样监测。 自2003年起，挪威斯克纸业博耶厂（Norske Skog Boyer）、尼尔斯塔霍巴特分公司（Nyrstar Hobart）以及塔斯马尼亚州政府，已在整个德文特河口的至多28个站点按月开展水环境质量常规监测。监测工作由三支不同的船舶采样团队执行，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，使用经过校准的传感器对水温、盐度、pH值、溶解氧及浊度进行原位现场测量。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、总悬浮固体（TSS）、总态与溶解态营养盐、有机碳及锌含量。在多数站点，还会使用塑料采集管采集深度混合水样以检测叶绿素a含量。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样瓶的灌装。所有水样均送至塔斯马尼亚分析服务实验室（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）认证的合规实验室。本次监测的站点水深为2米。