期刊
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
卷 54, 期 2, 页码 471-486出版社
WILEY
DOI: 10.1111/1752-1688.12618
关键词
nitrate; continuous nitrate sensor; Iowa Nutrient Reduction Strategy; information system; cyberinfrastructure
资金
- Iowa Nutrient Research Center
Various techniques exist to estimate stream nitrate loads when measured concentration data are sparse. The inherent uncertainty associated with load estimation, however, makes tracking progress toward water quality goals more difficult. We used high-frequency, insitu nitrate sensors strategically deployed across the agricultural state of Iowa to evaluate 2016 stream concentrations at 60 sites and loads at 35 sites. The generated data, collected at an average of 225days per site, show daily average nitrate-N yields ranging from 12 to 198g/ha, with annual yields as high as 53kg/ha from the intensely drained Des Moines Lobe. Thirteen of the sites that capture water from 82.5% of Iowa's area show statewide nitrate-N loading in 2016 totaled 477million kg, or 41% of the load delivered to the Mississippi-Atchafalaya River Basin (MARB). Considering the substantial private and public investment being made to reduce nitrate loading in many states within the MARB, networks of continuous, insitu measurement devices as described here can inform efforts to track year-to-year changes in nitrate load related to weather and conservation implementation. Nitrate and other data from the sensor network described in this study are made publicly available in real time through the Iowa Water Quality Information System.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据