Relación entre el cambio de uso del suelo en la cuenca del Aconcagua y su litoral arenoso correlativo: Chile central

Bäuerle, María Victoria Soto; González, Joselyn Arriagada; Correa, Carmen Paz Castro; Maerker, Michael; Rodolfi, Giuliano

doi:10.4067/s0718-34022011000300011

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Ello generó un aumento en las externalidades ambientales debido al carácter multisectorial de su uso y regulación (Aguayo, Pauchard, Azócar, & Parra, 2009) producto de lo cual, las actividades antrópicas (fuertemente marcadas por el aumento de los pasivos ambientales), han ocasionado en forma progresiva cambios físicos y químicos que han degradado en forma progresiva el suelo (Soto, Arriagada, Castro, Maerker, & Rodolfi, 2011), lo cual, se manifiesta en la pérdida de calidad, decrecimiento de la productividad y una alteración en sus funciones ecológicas (Ghafari et al, 2017).…”

Section: Introductionunclassified

Análisis de la fertilidad de los suelos de Alto Loica en San Pedro de Melipilla, Región Metropolitana (Chile)

Silva

2017

Investig. geogr.

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ResumenEn Chile, la erosión es el principal problema ambiental debido a que sobre el 40% de los suelos en el país está con problemas de erosión, limitando la capacidad de éstos para generar bienes y servicios. En la zona central del país, este fenómeno se intensifica en la Cordillera de la Costa, siendo las comunas rurales las más afectadas, principalmente la comuna de San Pedro de Melipilla, al SW de la Región Metropolitana. Este estudio tiene como objetivo analizar las propiedades físicas y químicas del suelo de Alto Loica, sector rural localizado al sur de la comuna de San Pedro. El estudio se efectuó en 4 microcuencas hidrográficas en Alto Loica, mediante el muestreo de suelos y el análisis de calicatas. Los resultados reflejaron que existen déficit críticos en las concentraciones de micro y macronutrientes, debido a lo cual los suelos presentan baja fertilidad y baja calidad y no son aptos para el desarrollo agropecuario, limitándose su uso solo a aptitud forestal. Por otra parte, esto se puede asociar a malas prácticas agrícolas efectuadas en el pasado, que derivaron en la erosión de los suelos del sector. Este estudio puede contribuir como un marco conceptual y referencial para futuros estudios de restauración y rehabilitación de suelos con el fin de recuperar la propiedad de los suelos de generar bienes y servicios. Palabras clave: suelos, erosión, fertilidad, macronutriente, micronutriente AbstractIn Chile, soil erosion is one of the main environmental problems as over 40% of the country's soils are subjected to erosion, limiting its capacity to generate goods and services. In the central areas of the country, this phenomenon is intensified at the coastal mountain ridge, with rural areas as the most affected. This is the case of the commune of San Pedro de Melipilla, located at the SW of the Metropolitan Region. The aim of this study is to analyze the physical and chemical characteristics of the soil in Alto Loica, which is a rural area located in the southern area of the commune of San Pedro. The study was carried out in four hydrographic micro-basins through the sampling of soils and the analysis of soil pits in Alto Loica. The results show critical deficits in the concentrations of micro and macro nutrients, resulting in low fertility and quality of soils. Thus, the soils of Alto Loica are not apt for agriculture-livestock use, limiting its use to forestry. Moreover, these could be related to poor agricultural practices in the past, which led to soil erosion in the area. Overall, this study could become a conceptual and referential framework for future soil restauration and rehabilitation studies aiming at recovering the soil ability to generate goods and services.

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Section: Introductionunclassified

Análisis de la fertilidad de los suelos de Alto Loica en San Pedro de Melipilla, Región Metropolitana (Chile)

Silva

2017

Investig. geogr.

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Sustainable land-use/Land-cover for stormwater management in three coastal watersheds in central Chile

Alarcon,

Callejas Morales

2023

Urban Water Journal

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Analysis of sediment from an irrigation dam in an agricultural valley impacted by the mega-drought in central Chile

Jaque,

Melo Pinochet,

Aránguiz-Acuña

et al. 2023

Front. Ecol. Evol.

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Central Chile has been affected since 2010 by an increasing mega-drought accompanied by a historically low precipitation rate, as a probable consequence of climate change. Additionally, the increasing pressure exerted by the withdrawals of human activities, such as agriculture and metal mining, promotes conditions of hydric scarcity. Despite this intensive use of the watersheds and the sustained and increasing aridity, it has not been explored whether an artificial sedimentary record can trace these changes in the agricultural valleys of the region. To unravel and evaluate the recent environmental/climatic variability, the effects of the mega-drought that has pertained since 2010, extractivist pressures on a Mediterranean valley in central Chile, and sediment records were obtained from an irrigation dam and studied through a multi-proxy analysis. The dam was built and has been in operation since 1975 and is located in the Aconcagua River Valley, Valparaíso, Chile. Magnetic properties, carbon content, mineral composition, and metal content were analyzed from sediments of a 120 cm long core. Changes in vegetation cover from 1990 to 2020 were analyzed through NDVI filters. Horizons associated with drier conditions were observed in the upper zone of the core, which corresponded from the year 2001 to the present, assuming a constant sedimentation rate of 2.72 cm·yr−1. Additionally, the characteristic alternation of dry–wet conditions was observed in the deep horizon of the dam sediments. The concentrations of Cu, Pb, Al, and As have increased over the years, while the concentration of Mo has decreased. Some of these elements are associated with copper mining, existing in the valley. Analysis of Landsat images from the year 2000 to the present has identified a significant decrease in vegetation cover associated with dry/wet periods, which may be related to cycles of El Niño/La Niña events. Although not all the proxies analyzed were sensitive enough to detect changes at the desired resolution, since the dam is very recent, the results shed light on the effects of the interaction between industrial activities and the decrease of water availability in multiple-use watersheds, suggesting variations in metals concentrations and changes in water availability, probably promoted by anthropic activities, climatic events, and increasing aridity in the Aconcagua River Valley.

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Relación entre el cambio de uso del suelo en la cuenca del Aconcagua y su litoral arenoso correlativo: Chile central

Cited by 3 publications

References 13 publications

Análisis de la fertilidad de los suelos de Alto Loica en San Pedro de Melipilla, Región Metropolitana (Chile)

Análisis de la fertilidad de los suelos de Alto Loica en San Pedro de Melipilla, Región Metropolitana (Chile)

Sustainable land-use/Land-cover for stormwater management in three coastal watersheds in central Chile

Analysis of sediment from an irrigation dam in an agricultural valley impacted by the mega-drought in central Chile

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