Micro-organic herbicides data from rivers [LOIS]

Micro-organic herbicide levels in river water for various sites within the Humber and Tweed catchments collected as part of the Land Ocean Interaction Study project (LOIS). The dataset contains data for Phenyl urea and Phenoxy acid herbicides, measured as 2,4-Dichlorophenoxyacetic acid, 4-(4-Chloro-O-tolyloxy) butyric acid, 4-Chloro-O-tolyloxyacetic acid, Chlorotoluron dissolved, Diuron dissolved, Isoproturon dissolved, Linuron dissolved, Mecoprop dissolved. Phenyl urea herbicide data is available for twelve sites in the Humber catchment within 1994 to 1995 and 1994 to 1997 and for three sites on the Tweed catchment within 1995. Phenoxy acid herbicide data is available for six sites (S1, U3, N4, W5 and O6) over the period December 1994 to September 1995, for 7 sites (S2, D7, A8, C9, D10, T11 and O12) over the period December 1994 to February 1997 and 3 sites (TW13, TW14 and TW15) over the period January 1995 to September 1995. Attempts were made to sample the sites at weekly intervals. However sampling was halted for short periods when it was not possible to process the samples quickly. Linuron dissolved was only measured from April 1994 - October 1994. Samples were collected in chromic acid-washed 1 litre glass bottles. Herbicide levels were concentrated before being measured using High Performance Liquid Chromatography for Phenyl urea herbicides and Gas Chromatography for Phenoxy acid herbicides. Until November 1994, analysis was completed by the York University and the Institute for Freshwater Ecology, Wareham, laboratories. From December 1994 onwards the samples were dispatched to the Institute for Hydrology, Wallingford, for extraction and analyses. Full details about this dataset can be found at https://doi.org/10.5285/e28ffc01-880d-423f-acb6-879b9fd4603a

汉伯河与特威德河流域内多个监测点的水体中微有机除草剂水平数据，此数据集系陆地与海洋相互作用研究项目（LOIS）的采集成果。数据集涵盖苯脲类和苯氧基酸类除草剂，具体测量指标包括2,4-二氯苯氧基乙酸、4-(4-氯-O-甲苯氧基)丁酸、4-氯-O-甲苯氧基乙酸、氯甲噻隆溶解度、二嗪溶解度、异丙噻隆溶解度、林丹溶解度、麦草畏溶解度等。苯脲类除草剂数据涵盖汉伯河流域内十二个监测点，时间跨度为1994年至1995年以及1994年至1997年，特威德河流域内三个监测点，时间为1995年。苯氧基酸类除草剂数据涵盖六个监测点（S1、U3、N4、W5和O6），时间范围为1994年12月至1995年9月，七个监测点（S2、D7、A8、C9、D10、T11和O12），时间范围为1994年12月至1997年2月，以及三个监测点（TW13、TW14和TW15），时间范围为1995年1月至1995年9月。尝试以每周为间隔进行采样，但在无法快速处理样本的情况下，采样活动曾暂时中断。林丹溶解度仅在1994年4月至1994年10月期间进行测量。样本收集于经铬酸清洗的1升玻璃瓶中。除草剂水平在测量前经过浓缩，苯脲类除草剂采用高效液相色谱法进行测量，而苯氧基酸类除草剂则采用气相色谱法进行测量。截至1994年11月，分析工作由约克大学和wareham淡水生态研究所实验室完成。自1994年12月起，样本被送往Wallingford的水文研究所进行提取和分析。关于此数据集的详细信息，请参阅https://doi.org/10.5285/e28ffc01-880d-423f-acb6-879b9fd4603a。