Hydrochemistry and stable isotopes revealed focused and diffuse recharge processes in the Sonora River basin, Mexico.

IF 1.1 4区环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Isotopes in Environmental and Health Studies Pub Date : 2023-03-01 DOI:10.1080/10256016.2023.2171032

Juan Pérez Quezadas, Yesica Guadalupe Cabrera Sillas, Rogelio Monreal, Miguel Rangel Medina, José Iván Morales Arredondo, Ricardo Sánchez-Murillo

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Abstract

A hydro-geochemical characterization was conducted in the northern part of the Sonora River basin, covering an area of 9400 km². Equipotential lines indicated that groundwater circulation coincided with the surface water flow direction. Based on the groundwater temperature measured (on average ∼21 °C), only one spring exhibited thermalism (51 °C). Electrical conductivity (160-1750 μS/cm), chloride and nitrate concentrations (>10 and >45 mg/L) imply highly ionized water and anthropogenic pollution. In the river network, δ¹⁸O values revealed a clear modern meteoric origin. Focused recharge occurred mainly from the riverbeds during the rainy season. During the dry season, diffuse recharge was characterized by complex return flows from irrigation, urban, agricultural, mining, and livestock. Drilled wells (>50 m) exhibited a strong meteoric origin from higher elevations during the rainy season with minimal hydrochemical anomalies. Our results contribute to the knowledge of mountain-front and mountain-block recharge processes in a semi-arid and human-altered landscape in northern Mexico, historically characterized by limited hydrogeological data.

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水化学和稳定同位素揭示了墨西哥索诺拉河流域集中和扩散补给过程。

在索诺拉河流域北部进行了水文地球化学表征，面积为9400 km2。等势线表明地下水循环与地表水流动方向一致。根据测量的地下水温度(平均~ 21°C)，只有一个泉水表现出热性(51°C)。电导率(160 ~ 1750 μS/cm)、氯化物和硝酸盐浓度(>10和>45 mg/L)表明水体高度电离，存在人为污染。在河网中，δ18O值显示了明显的现代大气成因。雨季集中补给主要发生在河床。在旱季，漫溢补给的特征是来自灌溉、城市、农业、采矿和牲畜的复杂回流。钻孔(>50 m)在雨季表现出强烈的高海拔大气来源，水化学异常最小。我们的研究结果有助于了解墨西哥北部半干旱和人为改变景观的山前和山块补给过程，这些景观的历史特征是水文地质数据有限。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Isotopes in Environmental and Health Studies 环境科学-环境科学

CiteScore

2.80

自引率

7.70%

发文量

审稿时长

3.0 months

期刊介绍： Isotopes in Environmental and Health Studies provides a unique platform for stable isotope studies in geological and life sciences, with emphasis on ecology. The international journal publishes original research papers, review articles, short communications, and book reviews relating to the following topics: -variations in natural isotope abundance (isotope ecology, isotope biochemistry, isotope hydrology, isotope geology) -stable isotope tracer techniques to follow the fate of certain substances in soil, water, plants, animals and in the human body -isotope effects and tracer theory linked with mathematical modelling -isotope measurement methods and equipment with respect to environmental and health research -diagnostic stable isotope application in medicine and in health studies -environmental sources of ionizing radiation and its effects on all living matter