Derwent Estuary Ambient Water Quality monitoring program - Site SC

Site SC 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

SC采样点由德文特河河口计划（Derwent Estuary Program）作为德文特河环境水质监测计划（Derwent Ambient Water Quality Monitoring Program）的组成部分，按月开展采样工作。自2003年起，由Norske Skog Boyer、Nyrstar Hobart与塔斯马尼亚州政府三方，在德文特河河口沿线至多28个监测点位按月实施环境水质监测。本次监测由三支独立的船舶采样团队负责开展，但所有采样活动均协调安排在每月的同一天进行。在每个监测点位，均使用经过校准的传感器原位测定水温、盐度、pH值、溶解氧与浊度；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（total suspended solids, TSS）、总营养盐与溶解态营养盐、有机碳以及锌元素。在多数点位，还会使用塑料管采集深度积分水样，用于叶绿素a（chlorophyll a）的检测分析。在河口中部与外河口区域，使用尼斯金采水器（Niskin Bottle）采集底层水样；在河口上游点位，则通过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实验室（Analytical Service Tasmania）进行检测，该机构为澳大利亚国家检测机构协会（National Association of Testing Authorities, NATA）认可的实验室。监测点位的水深为2米。