Characterizing the Aquifer Properties of the Cretaceous Niobrara Formation in Eastern Nebraska

Divine, Dana; Joeckel, R.M.; Lackey, Susan Olafsen

doi:10.1130/abs/2018nc-311608

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some wells may have been misplaced for the aquifer–geology category as such well‐specific information was often not available and assignment was according to aquifer and geology maps. The MD category may contain some wells of the Niobrara aquifer (Divine et al., 2017) but not of the Codell aquifer (Divine et al., 2016), in northeastern Nebraska, e.g., two wells of high hardness, S and TDS in northern Cedar County are likely of the Niobrara aquifer. The HPTo may include some of the Brule and Chadron aquifers (Divine & Sibray, 2017).…”

Section: Methodsmentioning

confidence: 99%

Irrigation well water: Essential nutrient contents and other properties

Wortmann

2021

Agrosystems Geosci & Env

View full text Add to dashboard Cite

Water nutrient concentrations and other properties were surveyed by sampling water from 642 irrigation wells in Nebraska. The amount of Ca, Mg, S, and Cl applied in irrigation exceeds removal in 15 Mg ha−1 of corn (Zea mays L.) grain harvest for most wells. Irrigation supply exceeded corn grain harvest removal of K, B, Mn, and Mo for >20% of the wells. The supply of P, Zn, Cu, Fe, and Mo was generally very low but sufficient with some wells to be considered in nutrient management plans. The median level of nitrate N was 4.4 mg kg–1 with 25% of the wells having >10 mg kg–1 NO3–N, which is above the suitability limit for human consumption. The agricultural lime equivalent applied with 1 or 2 Ml of irrigation was enough to neutralize the acidifying effect of 200 kg ha−1 of fertilizer N for 70 or 89% of the wells. Nutrient and lime supply was relatively low for Sandhills wells and relatively high for wells in river valleys of <30.5 m (100 ft) depth. No wells had excessive Na levels but 0.3% of the wells had high salinity levels. A grouping of wells into 11 aquifer–geology–depth categories accounted for >20% of the variation for most water properties but much variation occurred within categories. Sampling of the well water is needed for optimized nutrient and soil management. Information on nutrients supplied through irrigation should be complemented by regular soil testing and the use of recommended nutrient management guidelines.

show abstract

Section: Methodsmentioning

confidence: 99%

Irrigation well water: Essential nutrient contents and other properties

Wortmann

2021

Agrosystems Geosci & Env

View full text Add to dashboard Cite

show abstract

“…The Carlile formation is bound by Greenhorn and Niobrara carbonate reservoirs, the latter of which is a source of fresh water to eastern Nebraska . More significant aquifers in this column include the Dakota, Arikaree, and Ogallala (Figure ).…”

Section: Modeling Radionuclide Transport From Boreholesmentioning

confidence: 99%

Siting Deep Boreholes for Disposal of Radioactive Waste: Consequences for Tight Coupling between Natural and Engineered Systems

Krall

McCartin

Macfarlane

2020

Environ. Sci. Technol.

View full text Add to dashboard Cite

Since the Yucca Mountain project in the U.S. was defunded in 2010, the notion of disposing of spent nuclear fuel (SNF) in deep boreholes has been reinvigorated, most recently by private companies proposing to utilize lateral drilling technology to excavate boreholes for SNF disposal in sedimentary rock. It is claimed that this approach will alleviate site characterization efforts and expand the availability of potential disposal sites. However, long-term safety will hinge upon the prevalence of geochemically reducing, highly saline, and slow-flowing fluids around the waste emplacement zone, and to quantify these parameters in fluids sampled from depths >1 km will present a challenge. Regional data indicate only a narrow geographical extent of such conditions in the conterminous United States. Furthermore, models of radionuclide transport from disposal boreholes must take into account processes that may accelerate degradation of the canisters, plug, and SNF itself, such as radiolysis and attack by constituents of hydrothermal brines, coupled with hydrogeologic features that promote advective groundwater flow. This review summarizes some geologic considerations, most notably those related to geochemistry, that challenge the long-term safety case for deep borehole disposal of SNF.

show abstract

Characterizing the Aquifer Properties of the Cretaceous Niobrara Formation in Eastern Nebraska

Cited by 2 publications

References 0 publications

Irrigation well water: Essential nutrient contents and other properties

Irrigation well water: Essential nutrient contents and other properties

Siting Deep Boreholes for Disposal of Radioactive Waste: Consequences for Tight Coupling between Natural and Engineered Systems

Contact Info

Product

Resources

About