Water quality in the Trinity River basin, Texas, 1992-95

Land, Larry F.; Moring, J. Bruce; Metre, Peter C. Van; Reutter, David C.; Mahler, Barbara J.; Shipp, Allison A.; Ulery, Randy L.

doi:10.3133/cir1171

Cited by 15 publications

(21 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The climate of eastern Nebraska is typical of a humid continental region, with a mean annual precipitation of 720 mm (Fredrick et al, 2006). Mean annual precipitation near sampled sites in southeastern Texas is 1320 mm (Land et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Factors influencing ground-water recharge in the eastern United States

Nolan

Healy

Taber

et al. 2007

Journal of Hydrology

106

View full text Add to dashboard Cite

Kerie J.; and Wolock, David M., "Factors influencing ground-water recharge in the eastern United States" (2007). USGS Summary Ground-water recharge estimates for selected locations in the eastern half of the United States were obtained by Darcian and chloride-tracer methods and compared using statistical analyses. Recharge estimates derived from unsaturated-zone (R UZC ) and saturated-zone (R SZC ) chloride mass balance methods are less variable (interquartile ranges or IQRs are 9.5 and 16.1 cm/yr, respectively) and more strongly correlated with climatic, hydrologic, land use, and sediment variables than Darcian estimates (IQR = 22.8 cm/yr). The unit-gradient Darcian estimates are a nonlinear function of moisture content and also reflect the uncertainty of pedotransfer functions used to estimate hydraulic parameters. Significance level is <0.001 for nearly all explanatory variables having correlations with R UZC of <À0.3 or >0.3. Estimates of R SZC were evaluated using analysis of variance, multiple comparison tests, and an exploratory nonlinear regression (NLR) model. Recharge generally is greater in coastal plain surficial aquifers, fractured crystalline rocks, and carbonate rocks, or in areas with high sand content. Westernmost portions of the study area have low recharge, receive somewhat less precipitation, and contain fine-grained sediment. The NLR model simulates water input to the land surface followed by transport to ground water, depending on factors that either promote or inhibit water infiltration. The model explains a moderate amount of variation in the data set (coefficient of determination = 0.61). Model sensitivity analysis indicates that mean annual runoff, air temperature, and precipitation, and an index of ground-water exfiltration potential most influence estimates of recharge at sampled sites in the region. Soil characteristics and land use have less influence on the recharge estimates, but nonetheless are significant in the NLR model. ª

show abstract

Section: Introductionmentioning

confidence: 99%

Factors influencing ground-water recharge in the eastern United States

Nolan

Healy

Taber

et al. 2007

Journal of Hydrology

106

View full text Add to dashboard Cite

show abstract

“…Instead, our findings suggest that increases in native and intolerant species richness occurred as the fish assemblage shifted through time coincident with attenuated concentrations of nutrients and BOD. These results support previous conclusions regarding increased control over contaminants originating in DFW following legislation (Mirochna, ; Van Metre and Callender, ), which ultimately allowed for revitalization of aquatic assemblages in close proximity to DFW (Davis, ; Land et al ., ). Our findings expand upon these previous conclusions by documenting declining nutrient and BOD concentrations in the mainstem Trinity River far downstream (up to 400 km) of DFW, which coincided with fish community changes characterized by increased species richness through time and with distance from DFW.…”

Section: Discussionmentioning

confidence: 97%

“…Water quality notes are after Land et al . (), and fish collection data were compiled from published literature, state, federal, and private sources…”

Section: Introductionmentioning

confidence: 99%

Historical Changes in Fish Assemblage Composition Following Water Quality Improvement in the Mainstem Trinity River of Texas

Perkin

Bonner

2014

River Research & Apps

View full text Add to dashboard Cite

The Clean Water Act of 1972 is credited with improving water quality across the USA, although few long‐term studies tracking hydrologic, chemical, and biological responses to cleanup efforts exist. The Trinity River of Texas was plagued by poor water quality for more than a century before passage of legislation to reduce point source pollution from the Dallas–Fort Worth (DFW) Metroplex. We tracked changes in components of flow regime; concentrations of ammonia, nitrate, phosphorus, and biochemical oxygen demand (BOD); and fish assemblage composition in three mainstem reaches during a 40‐year period (1968–2008) following implementation of a large‐scale cleanup initiative. Results suggest little change in flow regime components such as magnitude, timing, and rate of change among the three reaches during 1968–2008. Concentrations of water quality parameters declined through time and with greater distance from DFW, including the lowest concentrations in the reach downstream of a mainstem reservoir (Lake Livingston). Fish assemblage composition shifts correlated with attenuated nutrient and BOD concentrations, and species richness generally increased among all reaches. Native and intolerant fishes consistently increased through time among all three reaches, although lentic and non‐native species also increased downstream of Lake Livingston. Our findings suggest a revitalization of the Trinity River fish assemblage associated with reduced nutrient pollution in DFW (even among distant reaches) and also illustrate potential confounding factors such as stream impoundment and continued nutrient deposition that likely preclude complete recovery. Copyright © 2014 John Wiley & Sons, Ltd.

show abstract

“…In order to identify high-risk locations, the current study used the posterior likelihood of a relative risk greater than 1 (Richardson et al 2004). A total of nine Texas watersheds had higher than 90% posterior likelihood of an SMR greater than 1 for a childhood cancer histotype (Table 2) (Land et al 1998;Bush et al 2000;Becker et al 2002). Nearly all water samples contained pesticides.…”

Section: Resultsmentioning

confidence: 99%

Risks of childhood cancer among Texas watersheds, based on mothers' living locations at the time of birth

Thompson

Carozza

Bissett

et al. 2009

Journal of Water and Health

View full text Add to dashboard Cite

Cancer is the most common fatal disease among US children. The fetus has reduced resistance to toxic injury and is especially prone to mutagenic injury because of the high rate of cell division.A fetus can be exposed to environmental toxins through maternal consumption of contaminated water. The objective of this study was to estimate the incidence risk for childhood cancers within each watershed in Texas. The approach modeled risk for 19 cancer histotypes incorporating correlations among the cancer types and spatial correlation. Several watersheds in a very large area known as the Central Great Plains of North Texas were associated with increased risk for astrocytoma. Two watersheds near Houston, Buffalo-San Jacinto and West Galveston Bay, had increased risk for renal cancer and acute lymphoid leukemia, respectively. A watershed in South Texas, the South Laguna Madre, had increased risk for atypical leukemias. The possibility that waterborne toxins cause these childhood cancers should be investigated further.

show abstract

Water quality in the Trinity River basin, Texas, 1992-95

Abstract: Back cover:

Cited by 15 publications

References 3 publications

Factors influencing ground-water recharge in the eastern United States

Factors influencing ground-water recharge in the eastern United States

Historical Changes in Fish Assemblage Composition Following Water Quality Improvement in the Mainstem Trinity River of Texas

Risks of childhood cancer among Texas watersheds, based on mothers' living locations at the time of birth

Contact Info

Product

Resources

About