Habitat point records from 1990 NRA Medway Estuary survey

The 1990 Rivers Survey includes a quality classification of estuaries to provide a simple assessment of estuarine quality based on dissolved oxygen, aesthetic criteria, and simple biological observations. In an attempt to satisfy the requirements for the biological part of the classification, the sampling was carried out by the NRA Southern Region and samples passed on to Southampton University for infaunal and sediment analysis. Two 0.1m2 surface area grab samples were taken from each sublittoral site, and sieved through a 1mm screen. Two 50mm diameter cores were taken at each littoral site, and sieved through a 0.5mm screen. Each sample was preserved in 5-8% saline formaldehyde solution. Duplicate samples were taken for particle size and chemical analysis.

1990年河流调查涵盖了潮间带地区的质量分类，旨在通过溶解氧、美学标准和简单的生物观测，对潮间带水质进行简明评估。为满足分类中生物部分的采样需求，由南部地区国家河流管理局（NRA Southern Region）负责采样，并将样本递交给南安普顿大学进行底栖生物和沉积物分析。在每个潮间带采样点，采集了两个0.1平方米的表面面积抓取样本，并通过1毫米的筛网筛选。在每个潮岸采样点，采集了两个直径为50毫米的核心样本，并通过0.5毫米的筛网筛选。每个样本均用5-8%的盐水福尔马林溶液保存。同时，对颗粒大小和化学成分进行了重复样本的采集。