DECOMPOSING A WATERSHED’S NITRATE SIGNAL USING SPATIAL SAMPLING AND CONTINUOUS SENSOR DATA
DECOMPOSING A WATERSHED’S NITRATE SIGNAL USING SPATIAL SAMPLING AND CONTINUOUS SENSOR DATA
复制标题
使用空间采样和连续传感器数据分解流域的硝酸盐信号
DOI：
10.13023/etd.2019.258
复制
发表时间：
2019
影响因子：
4
通讯作者：
E. Clare
中科院分区：
文献类型：
--
作者：
E. Clare
论文概要 使用空间采样和连续传感器数据分解流域的硝酸盐信号 流域特征、地形环境、地质、气候和水文过程相结合，在流域出口处产生随时间变化的养分浓度信号。人为影响，例如农业压力的增加和城市化，增加了输送到河流网络的总体养分负荷。营养物质负荷增加对肯塔基州饮用水的影响仍然对该地区构成潜在威胁。通过将地表水中硝酸盐浓度的空间采样与现代营养物和水质传感器技术相结合，完成了南埃尔克霍恩上游流域硝酸盐信号的分解以及流域中源时间和负荷的估计。该项目的目标是将在上南埃尔克霍恩流域出口处观察到的综合硝酸盐信号分解为来自农业/牧场和城市/郊区土地利用的径流和地下水源。分解流域的硝酸盐信号产生了关于未成熟河流喀斯特中硝酸盐来源、归宿和运输的新知识。本论文讨论了平均、季节性和波动的硝酸盐行为如何与土壤过程、地下水输送、河床去除和事件动态相关。预计硝酸盐信号的分解将允许确定流域养分减少的时间和来源。
OF THESIS DECOMPOSING A WATERSHED’S NITRATE SIGNAL USING SPATIAL SAMPLING AND CONTINUOUS SENSOR DATA Watershed features, physiographic setting, geology, climate, and hydrologic processes combine to produce a time-variant nutrient concentration signal at the watershed outlet. Anthropogenic influences, such as increased agricultural pressures and urbanization, have increased overall nutrient loadings delivered to the fluvial network. The impact of such increased nutrient loadings on Kentucky’s drinking water remains a potential threat to the region. By coupling spatial sampling of nitrate concentrations in surface water with contemporary nutrient and water quality sensor technology, a decomposition of the Upper South Elkhorn watershed’s nitrate signal and an estimation of source timing and loading in the watershed was completed. The goal of the project was the decomposition of the integrated nitrate signal observed at the outlet of the Upper South Elkhorn watershed into contributing runoff and groundwater sources from agricultural/pasture and urban/suburban land-uses. Decomposing the watershed’s nitrate signal yielded new knowledge learned about nitrate source, fate and transport in immature fluviokarst. This thesis discusses how mean, seasonal, and fluctuating nitrate behavior is related to soil processes, groundwater transfer, streambed removal, and event dynamics. It is expected that the decomposition of the nitrate signal will allow for the targeting of both the timing and sources for nutrient reductions in a watershed.
登录
查看更多内容
影响因子：
2.8
作者：
A. Husic;J. Fox;E. Adams;J. Backus;E. Pollock;W. Ford;C. Agouridis
通讯作者：
A. Husic;J. Fox;E. Adams;J. Backus;E. Pollock;W. Ford;C. Agouridis
影响因子：
6.6
作者：
Heisler J;Glibert P;Burkholder J;Anderson D;Cochlan W;Dennison W;Gobler C;Dortch Q;Heil C;Humphries E;Lewitus A;Magnien R;Marshall H;Sellner K;Stockwell D;Stoecker D;Suddleson M
通讯作者：
Suddleson M
影响因子：
11.4
作者：
Rode, Michael;Wade, Andrew J.;Jomaa, Seifeddine
通讯作者：
Jomaa, Seifeddine
影响因子：
9.8
作者：
Bowes, M. J.;Jarvie, H. P.;Palmer-Felgate, E. J.
通讯作者：
Palmer-Felgate, E. J.
影响因子：
3.2
作者：
Duncan, Jonathan M.;Band, Lawrence E.;Groffman, Peter M.
通讯作者：
Groffman, Peter M.