Characterization of streams and rivers in the Minnesota River Basin Critical Observatory: water chemistry and biological field collections, 2013-2016

This dataset was collected to inform the Water, Sustainability and Climate Minnesota River Basin Observatory, and was supported by the National Science Foundation under Grant No. 1209402 Water, Sustainability and Climate (WSC) – Category 2, Collaborative: Climate and human dynamics as amplifiers of natural change: a framework for vulnerability assessment and mitigation planning. The dataset contains point locations, watershed areas and water quality information for 231 ditch, stream, river and wetland sites located in the Le Sueur River, Chippewa River, Cottonwood River, Cannon River, Wantonwan River and Blue Earth River basins of Minnesota. Study sites ranged in size from 1st order ditches and streams to an 8th order river. Each of these sites was sampled at least once between 2013-2016 (most sites were sampled multiple times) for one or more of the following parameters: 1) water chemistry (total dissolved nitrogen, nitrate-N, nitrite-N, ammonium-N, particulate nitrogen, soluble reactive phosphorus, total dissolved phosphorus, particulate phosphorus, total phosphorus, dissolved organic carbon, dissolved inorganic carbon, particulate carbon, chlorophyll a, total suspended solids, volatile suspended solids, delta-H-2 and delta-O-18 stable isotopes of site water, specific UV absorbance (SUVA) of site water, fluorescence index (FI) of site water); 2) stable isotopes (delta-C-13, delta-N-15, delta-H-2) of invertebrate consumers, particulate carbon and potential food sources; 3) denitrification rates and characteristics of benthic sediment in agricultural drainage ditches; and 4) stream discharge. This dataset also includes spatial data files containing study site locations and watershed areas delineated for each site.

本数据集为支撑明尼苏达河流域观测站的水、可持续性与气候研究而构建，由美国国家科学基金会（National Science Foundation）资助项目编号1209402的“水、可持续性与气候（WSC）”第二类合作研究课题“气候与人类活动作为自然变化的放大器：脆弱性评估与减缓规划框架”支持。数据集涵盖明尼苏达州境内勒苏尔河、奇佩瓦河、科顿伍德河、坎农河、旺通万河及蓝土河流域内231个沟渠、溪流、河流与湿地点位的点位坐标、流域面积与水质信息。研究点位的尺度跨度较大，涵盖一级沟渠与溪流直至八级河流。所有点位均在2013年至2016年间完成至少一次采样（多数点位开展多次采样），检测以下一项或多项参数：1）水化学参数：总溶解氮、硝态氮、亚硝态氮、氨态氮、颗粒态氮、可溶性活性磷、总溶解磷、颗粒态磷、总磷、溶解有机碳、溶解无机碳、颗粒态碳、叶绿素a、总悬浮固体、挥发性悬浮固体、水样的δ²H与δ¹⁸O稳定同位素、水样的紫外比吸光度（SUVA）、水样的荧光指数（FI）；2）无脊椎动物消费者、颗粒碳及潜在食物源的稳定同位素（δ¹³C、δ¹⁵N、δ²H）；3）农业排水沟渠的反硝化速率与底栖沉积物特征；4）溪流径流量。本数据集同时包含研究点位空间数据文件，涵盖各点位的点位坐标与划定的流域面积。