Geologic map of the Rio Rico and Nogales 7.5’ quadrangles, Santa Cruz County, Arizona

Page, William R.; Menges, Christopher M.; Gray, Floyd; Berry, Margaret E.; Bultman, Mark W.; VanSistine, D. Paco

doi:10.3133/sim3354

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…This station's drainage area is~1,400 km 2 , of which approximately 1,150 km 2 are in Mexico. Downstream of the USGS gauge, the ephemeral channel overlies the microbasins aquifer, which consists of a series of four relatively shallow, highly permeable and limited-storage-capacity alluvial aquifers that are bounded by the low-permeability Nogales Formation (Erwin 2007;Page et al 2016). The microbasins extend along the river channel for about 25 km from the international border to the confluence with Nogales Wash near the NIWTP.…”

Section: Santa Cruz River Streamflowmentioning

confidence: 99%

Impacts of Variable Climate and Effluent Flows on the Transboundary Santa Cruz Aquifer

Tapia-Villaseñor

Shamir

Megdal

et al. 2020

J American Water Resour Assoc

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Assessing groundwater resources in the arid and semiarid borderlands of the United States and Mexico represents a challenge for land and water managers, particularly in the Transboundary Santa Cruz Aquifer (TSCA). Population growth, residential construction, and industrial activities have increased groundwater demand in the TSCA, in addition to wastewater treatment and sanitation demands. These activities, coupled with climate variability, influence the hydrology of the TSCA and emphasize the need for groundwater assessment tools for decision‐making purposes. This study assesses the impacts of changes in groundwater demand, effluent discharge, and climate uncertainties within the TSCA from downstream of the Nogales International Wastewater Treatment Plant to the northern boundary of the Santa Cruz Active Management Area. We use a conceptual water budget model to analyze the long‐term impact of the different components of potential recharge and water losses within the aquifer. Modeling results project a future that ranges from severe long‐term drying to positive wetting. This research improves the understanding of the impact of natural and anthropogenic variables on water sustainability, with an accessible methodology that can be globally applied.

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Section: Santa Cruz River Streamflowmentioning

confidence: 99%