North Carolina Piedmont, developed rural-urban catchment baseflow N loading

Baseflow grab samples and flow measurements were collected bi-weekly from 27 urbanized catchments in the NC piedmont over periods of one to fours years between Fall 2013 and Fall 2019. A subset of 13 catchments were sampled for isotopic nitrate in 2018. Sampled catchments were selected to approximate the median and span most of the range in metrics of landcover, infrastructure, and population density for developed NHD+ catchments in the Haw and Upper Neuse River basins. Land cover, infrastructure, topography, geology, and hydrogeomorphic position of development features were characterized for the study area. This data supports the findings of the manuscript \"The sources and transport of baseflow N loading across a developed rural-urban gradient\" submitted to WRR for review in Nov. 2021.

2013年秋季至2019年秋季期间，研究团队在北卡罗来纳州皮埃蒙特区域的27个城市化集水区（catchment）内，以每两周一次的频率采集基流（baseflow）瞬时水样（grab samples）与流量数据，采样周期跨度为1至4年。2018年，研究团队对其中13个集水区子集开展了硝酸盐同位素采样工作。本研究选取的采样集水区，旨在匹配霍河与上纽瑟河流域内已开发的NHD+集水区的土地覆盖、基础设施与人口密度指标的中位数，并覆盖其绝大多数值域范围。研究区域内的土地覆盖、基础设施、地形地貌、地质条件以及开发设施的水文地貌位置均已完成特征表征。本数据集支撑了2021年11月提交至《水资源研究》（WRR）同行评审的论文《发达区域城乡梯度下基流氮负荷的来源与输移》的研究发现。