Stream Temperature - Gwynns Falls at Glyndon (GFGL) Water year 2004-2005

Stream Temperature: Site: Gwynns Falls at Glyndon (GFGL): 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. Stream temperature is continuously measured throughout the Gwynns Falls watershed along with supplemental sites around Baltimore County/City. A total of 22 sites contain sensors (HOBO Pro v2 Water Temperature Data Logger - U22-001) that take an instantaneous temperature reading every 2 minutes. These data are downloaded on a monthly basis. This dataset is for Glyndon. The site is drained by approximately 83 ha of old and new suburban and suburbanizing land use. Additional data for this site are posted at: http://waterdata.usgs.gov/md/nwis/nwisman?site_no=01589197 http://waterdata.usgs.gov/md/nwis/inventory/?site_no=01589180 Purpose: Long-term monitoring of stream temperature in a suburban catchment. Theme keywords: stream, watershed, temperature, suburban, Baltimore Ecosystem Study Coordinates: Lat/Long 39.4717 (39 28 18) (-)76.8170 (-76 49 01) Review process for BES stream temperature data: Raw data were recorded and logged every 2-minutes using HOBO Pro v2 Water Temperature Data Logger - U22-001. Data are exported into Microsoft Excel documents. Then organized by site and by month Each month's data were entered into a pivot table in Microsoft Excel and daily means and counts of daily data points were calculated. Plots were graphed of sites with close geographic proximity on the same graph to illustrate possible outlier data. Missing and odd data were flagged, and notes taken from the field visits are provided where applicable.

河流水温数据集：格温斯福尔斯（Gwynns Falls）格林登（Glyndon）监测点（GFGL）：在巴尔的摩城市长期生态研究（Long-Term Ecological Research, LTER）项目（巴尔的摩生态研究计划，Baltimore Ecosystem Study, BES）中，我们采用流域方法评估集成生态系统功能。该LTER研究以格温斯福尔斯流域为核心研究对象，该流域面积达17150公顷，覆盖从巴尔的摩城市核心区、1900-1950年建成的老旧城市居住区、1950-1980年的郊区区域、快速郊区化地带至乡村/郊区边缘的完整梯度带。

格温斯福尔斯流域内及巴尔的摩县/市周边的补充监测点均开展连续河流水温监测。总计22个监测点配备了HOBO Pro v2水温数据记录仪（HOBO Pro v2 Water Temperature Data Logger - U22-001），每2分钟采集一次瞬时水温数据，数据每月下载更新一次。本数据集对应格林登监测点，该监测点所在集水区面积约83公顷，土地利用类型涵盖新旧郊区及郊区化用地。该站点的额外公开数据可通过以下链接获取：http://waterdata.usgs.gov/md/nwis/nwisman?site_no=01589197 及 http://waterdata.usgs.gov/md/nwis/inventory/?site_no=01589180

数据集用途：对郊区集水区的河流水温开展长期监测。

主题关键词：河流、流域、水温、郊区、巴尔的摩生态研究计划

坐标：纬度/经度：39.4717（39°28′18″），（西经）76.8170（76°49′01″）

BES河流水温数据审核流程：原始数据通过HOBO Pro v2水温数据记录仪（HOBO Pro v2 Water Temperature Data Logger - U22-001）每2分钟记录并存储，随后导出至Microsoft Excel文档，按监测站点与月份分类整理。将每月数据导入Microsoft Excel数据透视表，计算日平均水温及当日有效数据采集点数。将地理邻近的监测站点数据绘制于同一张图表中，以识别潜在异常数据。对缺失或异常数据进行标记，并在适用情况下附上野外考察记录备注。