Derwent Estuary Ambient Water Quality monitoring program - Site G2

Site G2 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

G2站位由德文特河口计划（Derwent Estuary Program）作为德文特环境水质监测计划（Derwent Ambient Water Quality Monitoring Program）的组成部分，每月开展采样工作。自2003年起，Norske Skog Boyer、Nyrstar Hobart与塔斯马尼亚州政府，已在整个德文特河口的至多28个站位开展月度环境水质监测。监测由三支独立的乘船采样团队实施，但协调为每月同一天统一进行。在每个站位，均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）测量水体透明度。研究人员会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）、总态及溶解态营养盐、有机碳与锌。在多数站位，还会使用塑料管采集深度整合水样以检测叶绿素a（chlorophyll a）。中河口与外河口的底质样品通过尼斯金采水器（Niskin bottle）采集；河口上游站位则采用泵体灌装采样瓶。所有水样均送至塔斯马尼亚分析服务实验室（Analytical Service Tasmania）——一家获得澳大利亚国家检测机构协会（National Association of Testing Authorities）认证的实验室——进行分析。该监测站位的水深为2米。