A reconnaissance of the ground-water resources of the Brazos River basin, Texas

Cronin, J.G.; Follett, C.R.; Shafer, G.H.; Rettman, P.L.

doi:10.3133/ofr6327

Cited by 8 publications

(14 citation statements)

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“…Bituminous coal is present in the Middle-Upper Pennsylvanian Strawn, Canyan, and Cisco groups (Hackley et al 2009;Moore and Plummer 1922). In the lower Brazos (downstream from Waco), the predominant bedrock is Eocene (56-34 Ma BP), Miocene (23-5.3 Ma BP) and Pleistocene (2.6 Ma to 11.7 Ka BP) sand, silt and clay deposits (Cronin et al 1963;Stricklin 1961). The channel floor and walls of the lower Brazos are alluvium (green color in Fig.…”

Section: Study Areamentioning

confidence: 99%

Controls on the origin and cycling of riverine dissolved inorganic carbon in the Brazos River, Texas

2010

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Rivers draining watersheds that include carbonate bedrock or organic matter (OM)-rich sedimentary rocks frequently have 14 C-depleted dissolved inorganic carbon (DIC) relative to rivers draining carbonate-and OM-free watersheds, due to dissolution of carbonate and/or decomposition of ancient OM. However, our results from a subtropical river, the Brazos River in Texas, USA, show that in this watershed human activities appear to dominate basin lithology in controlling the origin and metabolism of DIC. The middle Brazos flows through limestone and coal-bearing bedrock, but DIC isotope data suggest no limestone dissolution or respiration of ancient OM, and instead reflect efficient air-water CO 2 exchange, degradation of relatively young OM and photosynthesis in the river as a result of river damming and urban treated wastewater input. The lower Brazos drains only small areas of carbonate and coal-bearing bedrock, but DIC isotope data suggest the strong influence of carbonate dissolution, with a potentially minor contribution from decomposition of old soil organic matter (SOM). Oyster shells and crushed carbonate minerals used in road construction are likely sources of carbonate in the lower Brazos, in addition to natural marl and pedogenic carbonate. Additionally, the generally low pCO 2 and high DIC concentration in the Brazos River lead to a low CO 2 outgassing:DIC export ratio, distinguishing the Brazos River from other rivers.

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Section: Study Areamentioning

confidence: 99%

Controls on the origin and cycling of riverine dissolved inorganic carbon in the Brazos River, Texas

2010

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“…Study area hydrologic information has been reported by Smith (1940); Cronin, et al (1963); Rawson (1967) and Taylor (1978). Additional information has been obtained from an interview with a U.S.…”

Section: Hydrologymentioning

confidence: 99%

“…Information describing the geology of the Dyess AFB study are has been reported by Sellards, et al, 1932Sellards, et al, (reprinted 1981; Cronin, et al, 1963;Texas Bureau of Economic Geology, 1972;Kier, et al, 1977 andTaylor, 1978 …”

Section: Geologymentioning

confidence: 99%

“…The literature currently available (Cronin, et al, 1963;Taylor, 1978 and others) suggests that the principal nearsurface source of ground-water supplies is the Quaternary Alluvium, whose distribution is shown in Figure 3 Because little is known about shallow water-bearing units in the study area, an attempt was made to determine aquifer thickness and extent, using existing installation test boring information. Normally, however, the unit probably discharges to bedrock aquifers.…”

Section: Shallow Aquifermentioning

confidence: 99%

“…Information describing the quality of study area ground water has been obtained from Smith (1940); Cronin, et al (1963) No threatened or endangered animal species is known to be in permanent residence at Dyess AFB. However, the Peregrine Falcon, a federal endangered species, has been reported to be a periodic visitor to the installation during the period December through March and has been observed in the vicinity of the base water tower (HQSAC, 1983).…”

Section: Ground-water Qualitymentioning

confidence: 99%

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