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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Mexico
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North America
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Lower Cretaceous
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metals
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strontium
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Sr-87/Sr-86 (1)
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platinum group
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iridium (1)
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metamorphic rocks
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metaigneous rocks
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serpentinite (1)
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metasomatic rocks
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serpentinite (1)
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Mexico
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oxygen
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water resources (1)
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clastic rocks
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siltstone (1)
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sedimentary structures
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Travis County Texas
Evaluating reflux dolomitization using a novel high-resolution record of dolomite stoichiometry: A case study from the Cretaceous of central Texas, USA
Early Cretaceous cyclostome bryozoans from the early to middle Albian of the Glen Rose and Walnut formations of Texas, USA
Early Cretaceous gymnolaemate bryozoans from the early to middle Albian of the Glen Rose and Walnut formations of Texas, USA
Comparison of geophone and surface-deployed distributed acoustic sensing seismic data
Albian infaunal Pholadomyida (Cretaceous Bivalvia), Comanchean Carbonate Shelf, Texas
Determining the minimum number of pollen grains needed for accurate honey bee ( Apis mellifera ) colony pollen pellet analysis
Gavelinella Breardi , A New Name For the Turonian Gulf Coast Marker Species Anomalina “w”
Biostratigraphy of the Cenomanian–turonian Eagle Ford Shale of South Texas
Near-surface geophysical mapping of an Upper Cretaceous submarine volcanic vent in Austin, Texas, USA
Geophysical mapping of Mount Bonnell fault of Balcones fault zone and its implications on Trinity-Edwards Aquifer interconnection, central Texas, USA
High-resolution stratigraphy and facies architecture of the Upper Cretaceous (Cenomanian–Turonian) Eagle Ford Group, Central Texas
Modeling CO 2 Release Experiment in the Shallow Subsurface and Sensitivity Analysis
Estimating Urban-Induced Artificial Recharge: A Case Study for Austin, TX
The Secondary Permeability of Impervious Cover
Abstract Urbanization is increasing worldwide, and it has drastic effects on groundwater systems with ramifications for water management. Effects can include overexploitation, subsidence, water quality deterioration, destruction of environmental resources, increased runoff, alteration of the permeability and porosity fields, and changes in recharge. Commonly, it is assumed that recharge decreases, but data indicate the opposite: Groundwater recharge increases because of leaky utility (water and sewage) systems and urban irrigation. Urban areas are hydrologically similar to karst settings because they possess internal drainage (storm sewers), surface streams (paved drainage ways) that flow after heavy rains, and a shallow permeability structure dominated by fractures, conduits, and caves (buried utility trenches, abandoned pipes, etc.) that evolves very quickly. Secondary porosity from underground construction is similar in magnitude to karst secondary porosity. These structures and utility trenches increase permeability and make prediction of groundwater flow and transport difficult. Recharge is grouped into the following categories: direct (from precipitation), indirect (from surface water bodies and leaky utility systems), localized (through preferential pathways such as sinkholes), and artificial. Indirect recharge is commonly ignored in urban water budgets, but water main losses range from 5% to over 60%. Additional recharge comes from leaky sewers, leakage from beneath homes and industries, and irrigation return flow (e.g., lawn overwatering). A case study of Austin, Texas, demonstrates significant indirect recharge and the difficulties in its estimation. Nearly 8% of Austin water main flow is lost to become recharge. However, lawn irrigation may be a larger source.