Assessing monitoring and modeling approaches to improve water quality in the Hickory Grove Lake

Gali, Rohith K.

doi:10.31274/etd-180810-1244

Cited by 2 publications

(2 citation statements)

References 70 publications

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“…However, there are few published results which have conducted a comprehensive evaluation of major dissolved constituents in agricultural drainage efflux, and even fewer have done so with real drainage samples . Furthermore, with increasing interest in developing dielectric sensors to monitor nitrate, it is important to have current data on the presence and dynamics of the various ion species (Gali, 2014). Therefore, in this study we will address this knowledge gap by first performing a literature review to identify the major dissolved constituents in agricultural subsurface drainage effluent; note the focus of this study will be in reference to Iowa drainage waters.…”

Section: Introductionmentioning

confidence: 99%

Exploration of Ion Species in Agricultural Subsurface Drainage Waters

Zimmerman¹

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Section: Introductionmentioning

confidence: 99%

Exploration of Ion Species in Agricultural Subsurface Drainage Waters

Zimmerman¹

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“…However, few published studies have conducted a comprehensive evaluation of the major dissolved constituents in agricultural drainage efflux, and even fewer have done so with real drainage samples (Heng et al, 1991). Furthermore, with increasing interest in developing dielectric sensors to monitor nitrate levels in such waters, it is important to have current data on the presence and dynamics of various ion species (e.g., Gali, 2014;Yunus and Mukhopadhyay, 2011). Therefore, in this study, we addressed this knowledge gap by first performing a literature review to identify the major dissolved constituents in agricultural subsurface drainage effluent with a focus on Iowa drainage waters.…”

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confidence: 99%

Dissolved Constituents in Agricultural Drainage Waters

Zimmerman¹,

Kaleita²

2017

Transactions of the ASABE

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Abstract. Efflux of dissolved solutes in agricultural subsurface drainage systems adversely affects the ecosystems of receiving waters, degrades soil fertility, and represents an economic loss to farmers. These solutes are frequently studied without regard to their associated ions, which play a fundamental role in their transport characteristics. In this study, we conducted a literature review to identify major dissolved constituents in agricultural drainage waters characteristic of central Iowa and pinpointed causes of variability in the leaching rate of these constituents. This literature review is complemented by a thorough field investigation that analyzes major solute concentrations with respect to seasonal conditions, common cropping systems, and relationships among ions. Results from this investigation reveal that primary dissolved constituents consist of bicarbonate, calcium, nitrate, magnesium, chloride, sodium, and sulfate (in order of decreasing ppm concentration). Analysis of seasonal drainage samples showed that bicarbonate, calcium, and magnesium were present at greater concentrations during the post-growing season, while nitrate and chloride concentrations were greatest during the growing season. Seasonal variability of sulfate and sodium was negligible. Continuous corn and corn in annual rotation with soybeans had greater magnesium and chloride concentrations than soybeans in annual rotation with corn. Conversely, calcium concentrations were greater for soybean cropping systems compared to corn cropping systems. Bicarbonate and nitrate were not significantly different among any of the cropping systems. A strong correlation between bicarbonate and calcium suggests that agricultural lime dissolution was caused by mineral weathering, rather than by acidification due to N fertilizer applications or nitrification. An analysis of observed drainage flows, pH, and temperatures suggested that these parameters were not good indicators of differences in ionic composition. Keywords: Bicarbonate, Dissolved ions, Nitrate, pH, Subsurface drainage.

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Assessing monitoring and modeling approaches to improve water quality in the Hickory Grove Lake

Cited by 2 publications

References 70 publications

Exploration of Ion Species in Agricultural Subsurface Drainage Waters

Exploration of Ion Species in Agricultural Subsurface Drainage Waters

Dissolved Constituents in Agricultural Drainage Waters

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