Derived annual statistics of rainfall, streamflow and acidity for the Nant Trawsnant catchment, Llyn Brianne, Mid Wales, UK. (1982 to 2012)

This dataset comprises of derived annual statistics for measures of rainfall, streamflow, temperature and stream acidity (pH) for a stream, draining a small, approximately 1.2 square kilometres, upland conifer catchment. The stream, Nant Trawsnant, drains into the Llyn Brianne reservoir, Powys, United Kingdom. The data are for a 31 year period covering 1st April 1982 to 1st April 2012. The streamflow and acidity data are derived from 15 minute resolution observations throughout the calendar year 2013 from associated stream gauging and water quality stations on the Nant Trawsnant. The monthly rainfall measures presented, were derived from local rain gauges. The monthly temperature measures presented were derived from observations at a weather station near Talgarth, Powys. Routines within the Lancaster University Computer-Aided Program for Time-series Analysis and Identification of Noisy Systems (CAPTAIN) Toolbox for Matlab were used to develop a dynamic model of these data. These models were then used to simulate the 31-year record for which monthly statistics were derived. The statistics were derived to develop greater understanding of the controls on the long-term dynamics of aquatic biodiversity observed by other researchers in this stream. The work was part of the Diversity in Upland River Ecosystem Service Sustainability (DURESS) project, NERC grant NE/J014826/1. Members of staff from the Lancaster Environment Centre, Lancaster University installed, maintained and downloaded the stream gauging and water quality stations and also carried out statistical analysis of the data. Full details about this dataset can be found at https://doi.org/10.5285/b085a784-0e16-4174-b208-465a8f43c8c8本数据集包含某溪流的降水、径流、气温及溪流酸度（pH）的衍生年度统计指标，该溪流汇自面积约1.2平方千米的山地针叶林集水区。 该溪流名为南特特劳斯南特（Nant Trawsnant），最终汇入英国波伊斯郡的林布莱恩水库（Llyn Brianne reservoir）。 本数据集覆盖31年的时间跨度，即1982年4月1日至2012年4月1日。 径流与酸度数据源自2013年完整日历年期间，南特特劳斯南特溪流上配套径流监测站与水质监测站采集的15分钟分辨率观测数据。 本数据集所呈现的月度降水数据源自当地雨量站的观测记录。 本数据集所呈现的月度气温数据源自波伊斯郡塔尔加思（Talgarth）附近气象站的观测记录。 研究采用兰卡斯特大学（Lancaster University）面向Matlab开发的《噪声系统时序分析与辨识辅助程序（Computer-Aided Program for Time-series Analysis and Identification of Noisy Systems, CAPTAIN）》工具包中的相关程序，基于上述数据构建了动态模型。 随后利用所构建的模型对31年的时序数据进行模拟，并由此衍生出月度统计指标。 本次衍生统计指标的目的，是为了更深入理解其他研究者在该溪流中观测到的水生生物多样性长期动态的调控机制。 本研究属于《山地河流生态系统服务可持续性多样性（Diversity in Upland River Ecosystem Service Sustainability, DURESS）》项目的一部分，由英国自然环境研究委员会（Natural Environment Research Council, NERC）资助，项目编号NE/J014826/1。 兰卡斯特大学兰卡斯特环境中心（Lancaster Environment Centre）的工作人员负责了该溪流径流与水质监测站的搭建、维护与数据下载工作，并完成了数据的统计分析。 本数据集的完整详细信息可通过以下链接获取：https://doi.org/10.5285/b085a784-0e16-4174-b208-465a8f43c8c8