Stream chemistry data for Rognel Heights (urban) watershed - Spreadsheet format BES ID 564-

In the Baltimore urban long-term ecological research (LTER) project, (Baltimore Ecosystem Study, BES) we use the watershed approach to evaluate integrated ecosystem function. The LTER research is centered on the Gwynns Falls watershed, a 17,150 ha catchment that traverses a gradient from the urban core of Baltimore, through older urban residential (1900 - 1950) and suburban (1950- 1980) zones, rapidly suburbanizing areas and a rural/suburban fringe. Our long-term sampling network includes four longitudinal sampling sites along the Gwynns Falls as well as several small (40 - 100 ha) watersheds located within or near to the Gwynns Falls. The longitudinal sites provide data on water and nutrient fluxes in the different land use zones of the watershed (rural/suburban, rapidly suburbanizing, old suburban, urban core) and the small watersheds provide more focused data on specific land use areas (forest, agriculture, rural/suburban, urban). Each of the gaging sites is continuously monitored for discharge and is sampled weekly for chemistry. Additional chemical sampling is carried out in a supplemental set of sites to provide a greater range of land use. Weekly analyses includes nitrate, phosphate, total nitrogen, total phosphorus, chloride and sulfate, total suspended solids, turbidity, fecal coliforms, temperature, dissolved oxygen and pH. Cations, dissolved organic carbon and nitrogen and metals are measured on selected samples.

This dataset is for Rognel Heights. This is a 7.8 ha urban watershed with no natural drainage network. Samples (weekly grab and flow-weighted composite) are taken in a stormwater drainage pipe.

A detailed description of this site is posted at: http://md.water.usgs.gov/BES/01589340/.

Streamflow data for this site are posted at: http://waterdata.usgs.gov/md/nwis/nwisman?site_no=01589340

在巴尔的摩城市长期生态研究（Long-Term Ecological Research, LTER）项目（亦称巴尔的摩生态系统研究，BES）中，本团队采用流域方法开展综合生态系统功能评估。该LTER研究以格温尼斯瀑布（Gwynns Falls）流域为核心，该流域面积达17150公顷，涵盖从巴尔的摩城市核心区，历经1900-1950年建成的老城区居住区、1950-1980年的郊区地带、快速郊区化区域，直至城乡交错带的完整土地利用梯度。
本项目的长期采样网络包含沿格温尼斯瀑布布设的4个纵向采样点位，以及位于格温尼斯瀑布流域内部或周边的数个小型（40-100公顷）子流域。纵向采样点位可获取流域不同土地利用分区（城乡交错带、快速郊区化区域、老郊区地带、城市核心区）的水与营养盐通量数据；小型子流域则可针对特定土地利用类型区（森林、农田、城乡交错带、城市区域）提供更聚焦的监测数据。所有监测站点均持续监测径流量，并每周开展水质采样；此外还在补充布设的点位开展额外水质采样，以覆盖更广泛的土地利用类型范围。
每周常规水质分析指标包括硝酸盐、磷酸盐、总氮、总磷、氯化物、硫酸盐、总悬浮颗粒物、浊度、粪大肠菌群、水温、溶解氧及pH值；部分精选样品还会检测阳离子、溶解性有机碳、溶解性有机氮及金属元素。
本数据集对应罗格内尔高地（Rognel Heights）点位：该点位为面积7.8公顷的无天然排水系统城市流域，采样工作在雨水排水管内开展，采集样品包含每周瞬时水样与流量加权混合水样。
该点位的详细说明可访问：http://md.water.usgs.gov/BES/01589340/
该点位的径流量数据可访问：http://waterdata.usgs.gov/md/nwis/nwisman?site_no=01589340