Characterization of streamflow, water quality, and instantaneous dissolved solids, selenium, and uranium loads in selected reaches of the Arkansas River, southeastern Colorado, 2009-2010

Ivahnenko, Tamara; Ortiz, Roderick F.; Stogner, Robert W.

doi:10.3133/sir20125234

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…Watersheds with greater disease risk and dissolved molybdenum concentrations are more prevalent on the eastern plains of Colorado (Figure 4). Compared to much of Colorado, waters on the eastern plains have generally greater concentrations of major constituents, like calcium, because of evapotranspiration in a warmer and drier climate, and more prevalent sedimentary rocks that weather to release calcium [50]. An association of such rocks with molybdenum release remains to be explored and warrants further research.…”

Section: Discussionmentioning

confidence: 99%

Nontuberculous Mycobacterial Disease and Molybdenum in Colorado Watersheds

Lipner

French

Bern

et al. 2020

IJERPH

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Nontuberculous mycobacteria (NTM) are environmental bacteria that may cause chronic lung disease. Environmental factors that favor NTM growth likely increase the risk of NTM exposure within specific environments. We aimed to identify water-quality constituents (Al, As, Cd, Ca, Cu, Fe, Pb, Mg, Mn, Mo, Ni, K, Se, Na, Zn, and pH) associated with NTM disease across Colorado watersheds. We conducted a geospatial, ecological study, associating data from patients with NTM disease treated at National Jewish Health and water-quality data from the Water Quality Portal. Water-quality constituents associated with disease risk were identified using generalized linear models with Poisson-distributed discrete responses. We observed a highly robust association between molybdenum (Mo) in the source water and disease risk. For every 1- unit increase in the log concentration of molybdenum in the source water, disease risk increased by 17.0%. We also observed a statistically significant association between calcium (Ca) in the source water and disease risk. The risk of NTM varied by watershed and was associated with watershed-specific water-quality constituents. These findings may inform mitigation strategies to decrease the overall risk of exposure.

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Section: Discussionmentioning

confidence: 99%

Nontuberculous Mycobacterial Disease and Molybdenum in Colorado Watersheds

Lipner

French

Bern

et al. 2020

IJERPH

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Salt Flushing, Salt Storage, and Controls on Selenium and Uranium: A 31‐Year Mass‐Balance Analysis of an Irrigated, Semiarid Valley

Bern

Holmberg

Kisfalusi

2020

J American Water Resour Assoc

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Salinity, selenium, and uranium pose water‐quality challenges for the Arkansas River in southeastern Colorado and other rivers that support irrigation in semiarid regions. This study used 31 years of continuous discharge and specific conductance (SC) monitoring data to assess interannual patterns in water quality using mass balance on a 120‐km reach of river. Discrete sampling data were used to link the SC records to salinity, selenium, and uranium. Several important patterns emerged. Consumptive use reduced discharge by a median value of 33% and drove corresponding increases in salinity and uranium concentrations. Increased water availability for irrigation from rainfall and upstream snowpack in 1995–1999 flushed additional salinity and uranium into the river in 1996–2000; average annual total dissolved solids (salinity) concentrations increased 25%, and loads increased 131%. Smaller flushing events have occurred, sometimes lagging an increase in water availability by about one year. The pattern indicates flushing of salts temporarily stored, evaporatively concentrated, or of geologic origin. Mobilization of selenium from the reach was minor compared to salinity and uranium, and net selenium removal from the river was suggested in some years. Several processes related to irrigation could be removing selenium. The results provide context for efforts to improve water quality in the Arkansas River and rivers in other semiarid regions.

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Characterization of streamflow, water quality, and instantaneous dissolved solids, selenium, and uranium loads in selected reaches of the Arkansas River, southeastern Colorado, 2009-2010

Cited by 2 publications

References 11 publications

Nontuberculous Mycobacterial Disease and Molybdenum in Colorado Watersheds

Nontuberculous Mycobacterial Disease and Molybdenum in Colorado Watersheds

Salt Flushing, Salt Storage, and Controls on Selenium and Uranium: A 31‐Year Mass‐Balance Analysis of an Irrigated, Semiarid Valley

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