Groundwater resources and recharge processes in the Western Andean Front of Central Chile

Taucare, Matías; Daniele, Linda; Viguier, Benoît; Vallejos, Á.; Arancibia, Gloria

doi:10.1016/j.scitotenv.2020.137824

Cited by 37 publications

(33 citation statements)

References 78 publications

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“…The co-isotope line of groundwaters sampled along this work shows a slight deviation from the 33 • S LMWL as defined by Taucare et al and also from the co-isotope line defined for snow and rain samples in this work ( Figure S2) [45]. The groundwater line (slope 7.17) reflects limited evaporation, assuming that the 33 • S LMWL (slope 8.07) is representative of precipitation for this region.…”

Section: Groundwatersupporting

confidence: 59%

“…If the time of exposition were longer, then a much stronger effect on the co-isotope line could be expected, as the water remains exposed to the atmosphere for a longer time period. Taucare et al report a much higher degree of evaporation of spring and groundwater in their study (slope 3.54) [45]. The intercept of the evaporation line of groundwater and the 33 • S LMWL occurs at δ 18 O = −17.6% , which is a more depleted value than the value informed by Taucare et al [45] (δ 18 O = −12.6% ).…”

Section: Groundwatermentioning

confidence: 61%

“…Taucare et al report a much higher degree of evaporation of spring and groundwater in their study (slope 3.54) [45]. The intercept of the evaporation line of groundwater and the 33 • S LMWL occurs at δ 18 O = −17.6% , which is a more depleted value than the value informed by Taucare et al [45] (δ 18 O = −12.6% ). Using the same altitude-isotope gradient (−0.3% 100 m −1 ) from Taucare et al, we can infer that the recharge zone of groundwater for the present study occurs much higher in the mountain at around 3700 m a.s.l.…”

Section: Groundwatermentioning

confidence: 61%

“…Proportional contribution of each water source to the headwaters of the Aconcagua River basin according to different "simmr" analysis. (Figure 3 and Figure S1) [45]. Snow catchments samples fall over the LMWL ( Figure S1), which indicates that the water is not largely affected by evaporation during run-off.…”

Section: Snow Systemmentioning

confidence: 87%

“…Because observation boreholes are missing from the mountain areas in the Aconcagua river basin, the groundwater samples were taken from perennial springs and agricultural boreholes. While these boreholes were situated downstream the analyzed area, they are suitable as a source of water as they are recharged from the Principal Cordillera through a high density of connected fractured aquifers [45,46].…”

Section: Discussionmentioning

confidence: 99%

See 4 more Smart Citations

Where Does the Chilean Aconcagua River Come from? Use of Natural Tracers for Water Genesis Characterization in Glacial and Periglacial Environments

Crespo

Lavergne

Fernandoy

et al. 2020

Water

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The Aconcagua river basin (Chile, 32 °S) has suffered the effects of the megadrought over the last decade. The severe snowfall deficiency drastically modified the water supply to the catchment headwaters. Despite the recognized snowmelt contribution to the basin, an unknown streamflow buffering effect is produced by glacial, periglacial and groundwater inputs, especially in dry periods. Hence, each type of water source was characterized and quantified for each season, through the combination of stable isotope and ionic analyses as natural water tracers. The δ18O and electric conductivity were identified as the key parameters for the differentiation of each water source. The use of these parameters in the stable isotope mixing “simmr” model revealed that snowmelt input accounted 52% in spring and only 22–36% during the rest of the year in the headwaters. While glacial supply contributed up to 34%, both groundwater and periglacial exhibited a remarkable contribution around 20% with some seasonal variations. Downstream, glacial contribution averaged 15–20%, groundwater seasonally increased up to 46%, and periglacial input was surprisingly high (i.e., 14–21%). The different water sources contribution quantification over time for the Aconcagua River reported in this work provides key information for water security in this territory.

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Section: Groundwatersupporting

confidence: 59%

Section: Groundwatermentioning

confidence: 61%

Section: Groundwatermentioning

confidence: 61%

Section: Snow Systemmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Where Does the Chilean Aconcagua River Come from? Use of Natural Tracers for Water Genesis Characterization in Glacial and Periglacial Environments

Crespo

Lavergne

Fernandoy

et al. 2020

Water

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Estimation of soil mobilization rates by a rainy period and intense tillage practices in vineyards—A case study in the Maule region (Chile)

Lozano‐Parra

Maldonado‐Clavelle

Caballero‐Calvo

et al. 2023

Hydrological Processes

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Winemaking in Chile is a long tradition that is recognized around the world. It is especially important in the Maule region where more than 40% of the total wine in the country is produced. However, there is a lack of studies related to soil erosion in vineyards in Chile, especially considering the extreme rainfall events that occur in the country. This research estimates soil erosion mobilization rates before and after a rainy season between April 2020 and May 2020 using the "improved stock unearthing method" on two inter-row plots in a vineyard located in the Maule region of Chile. This method relies on the graft union as a bioindicator for assessing soil surface-level changes. Maps of the soil surface were obtained to show how soil depletion and accumulation points within the inter-row areas could be detected. It has been estimated that a total soil mobilization of 85.7 and 130 Mg ha yr À1 had occurred in the inter-row areas 1 and 2, respectively, since the establishment of the plantation. However, a single rain event mobilized soil at rates of 5.5 and 3.5 Mg ha yr À1 , respectively, in the inter-row areas 1 and 2. We have demonstrated that erosive processes present in the study area exceed the rates of soil formation and the tolerable rates of erosion on a global scale. The results allow re-thinking of agricultural practices and management of soil systems to improve the sustainability of conventional Chilean vineyards and their soils.erosion, improved stock unearthing method, sustainable agriculture, vineyards | INTRODUCTIONGlobally, about a third of the total arable land has been lost in the last 40 years due to erosion, and at an alarming loss rate of more than 10 million ha per year (FAO, 2015). Many recent investigations estimated that cultivated soils show severe or moderate degradation due to the absence of vegetation cover and the use of herbicides (Cerdà,

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Hydrochemical evolution and hydrological zoning characteristics of a shallow groundwater system in Baiyangdian Wetland, North China Plain

Guo,

Wang,

Shi

et al. 2024

Hydrological Processes

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A comprehensive understanding of the hydrochemical evolution and spatial patterns of shallow groundwater systems is essential for water resource management and wetland ecological restoration. The Baiyangdian Wetland is one of the most concerning areas because of the development of the Xiong'an New Area. The spatial characteristics of groundwater hydrochemistry and potential controlling factors associated with hydrochemical evolution remain unclear. In this study, hydrogeochemistry together with the hierarchical cluster analysis were used to elucidate the hydrochemical processes and hydrological zoning patterns of shallow groundwater systems in the Baiyangdian Wetland, North China Plain. The results showed that hydrochemical compositions of shallow groundwater had considerable spatial variations, which was closely related to the inflow rivers hydrochemistry and the dynamics of groundwater–surface water interactions. A significant increase in SO42− concentration occurring at the cone of the depression was related to extensive pumping caused by anthropogenic activities. Anthropogenic activities were also a major factor controlling the spatial distribution patterns of shallow groundwater hydrochemistry. Ca2+, Mg2+, and SO42− in the wetland and shallow groundwater were primarily derived from carbonate and gypsum dissolution, while Na+ and Cl− originated from halite and silicate dissolution. Rock weathering predominated the geochemical evolution of shallow groundwater in conjunction with carbonate precipitation and cation exchange. The hydrochemistry of the shallow groundwater system presented distinct spatial zonation patterns that were classified into four clusters corresponding to seven subzones. In Zones I–IV, water‐rock interaction was the dominant factor controlling shallow groundwater chemistry, which was driven by the positive groundwater–surface water exchange. The coupled effects of anthropogenic activities and river infiltration and mixing caused the high levels of dissolved components in Zones V–VII. This study contributes to have a better understanding of the water cycle and hydraulic connections among different bodies, and will benefit the rational evaluation of hydrochemical evolution and wetland ecological restoration in the Baiyangdian Wetland.

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Groundwater resources and recharge processes in the Western Andean Front of Central Chile

Cited by 37 publications

References 78 publications

Where Does the Chilean Aconcagua River Come from? Use of Natural Tracers for Water Genesis Characterization in Glacial and Periglacial Environments

Where Does the Chilean Aconcagua River Come from? Use of Natural Tracers for Water Genesis Characterization in Glacial and Periglacial Environments

Estimation of soil mobilization rates by a rainy period and intense tillage practices in vineyards—A case study in the Maule region (Chile)

Hydrochemical evolution and hydrological zoning characteristics of a shallow groundwater system in Baiyangdian Wetland, North China Plain

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