El cambio climático viene alterando las condiciones del clima local; siendo las temperaturas extremas y las precipitaciones pluviales los parámetros más sensibles; por ende se investiga el impacto del cambio climático en la agricultura de la cuenca Ramis, con el objetivo de evaluar el comportamiento de las variables climáticas durante el periodo 2012-2014 y su efecto en la actividad agrícola del altiplano. Para tal efecto se ha trabajado con las series históricas de temperaturas extremas y precipitaciones pluviales de 46 años de las nueve estaciones meteorológicas seleccionados en base de tres criterios: longitud de las series, estaciones con datos faltantes y por la consistencia. Estos series fueron sistematizados, corregidas y completadas en base del análisis de bomogeneidad; con las pruebas no paramétricas y paramétricas se ha determinado las tendencias con niveles de sign...

Concrete is the most common material used in most civil works because it is a highly resistant and with material steel has a good structural behavior, its production is used as the main cement component, which directly affects the cost , which is why it seeks to reduce the amount of cement with the addition of fly ash, which is a pollutant, waste of power plants. The objective was to dose mixtures of added fly ash as a substitute for the cement in such a way that it does not diminish the resistance of this one and to find the optimal dosage. The material and method used is normal concrete with fly ash additions to the design in proportions of 2.5%, 5.0%, 10.0% and 15.0% for breakages at 7, 14 and 28 days. The results indicate that after 28 days have resistances averaging 221kg/cm2 for both normal concrete as well as concrete with fly ash 2.5%, 231kg/cm2 for 5.0%, 200kg/cm2 ...

Concrete is the most common material used in most civil works because it is a highly resistant and with material steel has a good structural behavior, its production is used as the main cement component, which directly affects the cost , which is why it seeks to reduce the amount of cement with the addition of fly ash, which is a pollutant, waste of power plants. The objective was to dose mixtures of added fly ash as a substitute for the cement in such a way that it does not diminish the resistance of this one and to find the optimal dosage. The material and method used is normal concrete with fly ash additions to the design in proportions of 2.5%, 5.0%, 10.0% and 15.0% for breakages at 7, 14 and 28 days. The results indicate that after 28 days have resistances averaging 221kg/cm2 for both normal concrete as well as concrete with fly ash 2.5%, 231kg/cm2 for 5.0%, 200kg/cm2 ...

Concrete is the most common material used in most civil works because it is a highly resistant and with material steel has a good structural behavior, its production is used as the main cement component, which directly affects the cost , which is why it seeks to reduce the amount of cement with the addition of fly ash, which is a pollutant, waste of power plants. The objective was to dose mixtures of added fly ash as a substitute for the cement in such a way that it does not diminish the resistance of this one and to find the optimal dosage. The material and method used is normal concrete with fly ash additions to the design in proportions of 2.5%, 5.0%, 10.0% and 15.0% for breakages at 7, 14 and 28 days. The results indicate that after 28 days have resistances averaging 221kg/cm2 for both normal concrete as well as concrete with fly ash 2.5%, 231kg/cm2 for 5.0%, 200kg/cm2 ...

Concrete is the most common material used in most civil works because it is a highly resistant and with material steel has a good structural behavior, its production is used as the main cement component, which directly affects the cost , which is why it seeks to reduce the amount of cement with the addition of fly ash, which is a pollutant, waste of power plants. The objective was to dose mixtures of added fly ash as a substitute for the cement in such a way that it does not diminish the resistance of this one and to find the optimal dosage. The material and method used is normal concrete with fly ash additions to the design in proportions of 2.5%, 5.0%, 10.0% and 15.0% for breakages at 7, 14 and 28 days. The results indicate that after 28 days have resistances averaging 221kg/cm2 for both normal concrete as well as concrete with fly ash 2.5%, 231kg/cm2 for 5.0%, 200kg/cm2 ...

RESUMEN El trabajo se desarrolló en distrito de Pilcuyo, El Collao, Perú durante el 2019, con el objetivo de analizar la disponibilidad a cooperar para la sostenibilidad de servicios de saneamiento que permita una gestión sostenible en el ámbito rural, estimar en función a las características socioeconómicas de la población beneficiaria y garantizar la sostenibilidad de servicio de letrinas ecológicas. Se aplicó encuestas a 180 beneficiarios por estratificación de las 16 comunidades, esta información fue sistematizada en procesados de Excel y software Stata mediante el método de valoración contingente con el modelo Logit que permitió estimar la disposición a cooperar para la sostenibilidad de infraestructura de saneamiento. Los resultados obtenidos determinan que un 45,56% de familias perciben ingreso económico mensual de 138,00 soles, consideradas muy bajo, por lo que ...

The study was conducted in Lake Rinconada, a glacial lake affected by artisanal and small-scale gold mining activities in the southern Andes in Peru. The objectives of the study were to investigate the spatial distribution of heavy metals (As, Cu, Hg, Pb and Zn) in water and sediments and to assess the degree of metal pollution and ecological risk using the geoaccumulation and potential ecological risk indexes. The concentrations of As and Hg in sediments from Lake Rinconada exceeded the Canadian sediment quality regulations, whereas the concentrations of As, Hg and Pb in water and sediments from the mining-affected tributary, Lunar de Oro River exceeded the Peruvian and Canadian guidelines for water and sediments quality respectively. According to the geoaccumulation and potential ecological risk indexes, Lake Rinconada is extremely polluted by As and Hg, and the pollution is mostly con...