Connections among soil, ground, and surface water chemistries characterize nitrogen loss from an agricultural landscape in the upper Missouri River Basin

Sigler, W. Adam; Ewing, S. A.; Jones, Clain; Payn, R. A.; Brookshire, E. N. Jack; Klassen, Jane K.; Jackson-Smith, Douglas B.; Weissmann, Gary S.

doi:10.1016/j.jhydrol.2017.10.018

Cited by 22 publications

(40 citation statements)

References 55 publications

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“…Stream N export from CRW forested subwatersheds was less than 10 kg N ha -1 year -1 and averaged 3 kg N ha -1 year -1 , comparable to forested watersheds in other studies (Boyer et al 2002;Schaefer and Alber 2007). However, regarding agricultural subwatersheds, the CRW value (average of 22 kg N ha -1 year -1 ) was 1-2 times higher than in other regions (Sobota et al 2009;Boyer et al 2002;Schaefer and Alber 2007;Sigler et al 2018). CRW values are more similar to field-level nitrate leaching fluxes of 24 kg N ha -1 year -1 from tile drained wheat fields in eastern Washington (Kelley et al (2013), and N export of 18 kg N ha -1 year -1 in Montana agricultural basins (Sigler et al 2018).…”

Section: Comparison With Other Watershedssupporting

confidence: 49%

“…However, regarding agricultural subwatersheds, the CRW value (average of 22 kg N ha -1 year -1 ) was 1-2 times higher than in other regions (Sobota et al 2009;Boyer et al 2002;Schaefer and Alber 2007;Sigler et al 2018). CRW values are more similar to field-level nitrate leaching fluxes of 24 kg N ha -1 year -1 from tile drained wheat fields in eastern Washington (Kelley et al (2013), and N export of 18 kg N ha -1 year -1 in Montana agricultural basins (Sigler et al 2018). Upper Missouri River basin watersheds of Montana also had a high proportion of fertilizer inputs exported (19-31% of added fertilizer; Sigler et al 2018), similar to the CRW.…”

Section: Comparison With Other Watershedsmentioning

confidence: 76%

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Seasonality of nitrogen balances in a Mediterranean climate watershed, Oregon, US

et al. 2018

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We constructed a seasonal nitrogen (N) budget for the year 2008 in the Calapooia River Watershed (CRW), an agriculturally dominated tributary of the Willamette River (Oregon, U.S.) under Mediterranean climate. Synthetic fertilizer application to agricultural land (dominated by grass seed crops) was the source of 90% of total N input to the CRW. Over 70% of the stream N export occurred during the wet winter, the primary time of fertilization and precipitation, and the lowest export occurred in the dry summer. Averaging across all 58 tributary subwatersheds, 19% of annual N inputs were exported by streams, and 41% by crop harvest. Regression analysis

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Section: Comparison With Other Watershedssupporting

confidence: 49%

Section: Comparison With Other Watershedsmentioning

confidence: 76%

Seasonality of nitrogen balances in a Mediterranean climate watershed, Oregon, US

et al. 2018

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“…Fractional riverine export for NRW falls within the range of that reported for other watersheds in the Pacific Northwest region (8–30%), such as the Willamette River Basin and Calapooia River Watershed (Compton et al, 2020; Lin et al, 2019). Riverine export rate of the NRW, however, is lower than that of most Willamette and Calapooia subwatersheds and more similar to the export rate of forested subwatersheds and agricultural watersheds in other regions in the United States (Boyer et al, 2002; Schaefer & Alber, 2007; Sigler et al, 2018; Sobota et al, 2009). This is because the NRW has less agricultural land proportionally, different farming practices (less synthetic fertilizer input), and crop types compared to WRB and CRW in spite of their similar climates.…”

Section: Discussionmentioning

confidence: 85%

Key Components and Contrasts in the Nitrogen Budget Across a U.S.‐Canadian Transboundary Watershed

et al. 2020

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Watershed nitrogen (N) budgets provide insights into drivers and solutions for groundwater and surface water N contamination. We constructed a comprehensive N budget for the transboundary Nooksack River Watershed (British Columbia, Canada, and Washington, USA) using locally derived data, national statistics, and standard parameters. Feed imports for dairy (mainly in the United States) and poultry (mainly in Canada) accounted for 30% and 29% of the total N input to the watershed, respectively. Synthetic fertilizer was the next largest source contributing 21% of inputs. Food imports for humans and pets together accounted for 9% of total inputs, lower than atmospheric deposition (10%). N imported by returning salmon representing marine-derived nutrients accounted for <0.06% of total N input. Quantified N export was 80% of total N input, driven by ammonia emission (32% of exports). Animal product export was the second largest output of N (31%) as milk and cattle in the United States and poultry products in Canada. Riverine export of N was estimated at 28% of total N export. The commonly used crop nitrogen use efficiency (NUE) metric alone did not provide sufficient information on farming activities but in combination with other criteria such as farm-gate NUE may better represent management efficiency. Agriculture was the primary driver of N inputs to the environment as a result of its regional importance; the N budget information can inform management to minimize N losses. The N budget provides key information for stakeholders across sectors and borders to create environmentally and economically viable and effective solutions.

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“…Recent research supports the project’s assumption that temporal variability in groundwater contaminant levels of Mn [ 182 ], nitrate [ 183 ], U and As [ 184 ] is limited. Such temporal variability in groundwater has been seen in specific conditions, e.g., where high recharge rates impact shallow wells [ 184 ], or in the case of As, where there are distinct rainy and dry seasons [ 133 ].…”

Section: Discussionmentioning

confidence: 88%

Community Engaged Cumulative Risk Assessment of Exposure to Inorganic Well Water Contaminants, Crow Reservation, Montana

Eggers

Doyle

Lefthand

et al. 2018

IJERPH

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An estimated 11 million people in the US have home wells with unsafe levels of hazardous metals and nitrate. The national scope of the health risk from consuming this water has not been assessed as home wells are largely unregulated and data on well water treatment and consumption are lacking. Here, we assessed health risks from consumption of contaminated well water on the Crow Reservation by conducting a community-engaged, cumulative risk assessment. Well water testing, surveys and interviews were used to collect data on contaminant concentrations, water treatment methods, well water consumption, and well and septic system protection and maintenance practices. Additive Hazard Index calculations show that the water in more than 39% of wells is unsafe due to uranium, manganese, nitrate, zinc and/or arsenic. Most families’ financial resources are limited, and 95% of participants do not employ water treatment technologies. Despite widespread high total dissolved solids, poor taste and odor, 80% of families consume their well water. Lack of environmental health literacy about well water safety, pre-existing health conditions and limited environmental enforcement also contribute to vulnerability. Ensuring access to safe drinking water and providing accompanying education are urgent public health priorities for Crow and other rural US families with low environmental health literacy and limited financial resources.

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Connections among soil, ground, and surface water chemistries characterize nitrogen loss from an agricultural landscape in the upper Missouri River Basin

Abstract: Connections among soil, ground, and surface water chemistries characterize nitrogen loss from an agricultural landscape in the upper Missouri River basin."

Cited by 22 publications

References 55 publications

Seasonality of nitrogen balances in a Mediterranean climate watershed, Oregon, US

Seasonality of nitrogen balances in a Mediterranean climate watershed, Oregon, US

Key Components and Contrasts in the Nitrogen Budget Across a U.S.‐Canadian Transboundary Watershed

Community Engaged Cumulative Risk Assessment of Exposure to Inorganic Well Water Contaminants, Crow Reservation, Montana

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