Tópicos Sugeridos dentro de su búsqueda.
Tópicos Sugeridos dentro de su búsqueda.
1
objeto de conferencia
Publicado 2017
Enlace
Enlace
We would like to thank the PUPC and CONCYTEC for the opportunity given to carry out this work within the management agreement N° 27-2015 - FONDECYT between these institutions. In addition, the authors thank to SENAMHI and especially to Alan Llacza.
2
artículo
Publicado 2024
Enlace
Enlace
The loss of biodiversity and the effects of climate change hurt agricultural production and food security in Peru and around the world. The family farming sector in Peru (97% of agricultural units – AU) faces numerous challenges when it comes to sustainably producing food. To sustain Peruvian agriculture in the face of climate change, climate-smart agricultural (CSA) practices and agrobiodiversity conservation are essential. This document characterizes the level of agrobiodiversity (index IDA) of family AUs in the Crisnejas basin and analyzes the impact of the elements that affect farmers’ decisions to apply multiple CSA measures. CSA adoption decisions were analyzed using an econometric analysis framework combining multivariate and ordered probit models for 340 family AUs. Results indicate that AUs with a lower agrobiodiversity index (IDA) have a higher monthly income (IDA = 0.56, 3...
3
artículo
Publicado 2020
Enlace
Enlace
In this work, maximum flows observed in the Paranapanema river basin are modeled by a mixture of two GEV distributions whose components correspond to the summer and winter subpopulations. The nonlinear discriminant function allowed to confirm the assumption of mixture model.The proposed model is then used to determine probabilities of exceedance and return periods associated with extreme flows, which are of fundamental importance for hydraulic projects. The results show significant differences when a mixture model is used and therefore an approach more coherent with the observed data.
4
artículo
Publicado 2020
Enlace
Enlace
In this work, maximum flows observed in the Paranapanema river basin are modeled by a mixture of two GEV distributions whose components correspond to the summer and winter subpopulations. The nonlinear discriminant function allowed to confirm the assumption of mixture model.The proposed model is then used to determine probabilities of exceedance and return periods associated with extreme flows, which are of fundamental importance for hydraulic projects. The results show significant differences when a mixture model is used and therefore an approach more coherent with the observed data.
5
artículo
Publicado 2021
Enlace
Enlace
The present study was carried out at the confluence of the Baños, Minascocha and Quilla micro-basins; which belongs to the upper part of the Chancay-Huaral basin, in order to identify the areas of greatest vulnerability to high intensity rainfall phenomena (floods). For the modeling of this section, the flows obtained by means of the SWAT software were used. The flood simulation was carried out using the IBER V2.5 software, which is free software, which is used to simulate floods in shallow waters, that is, shallow waters. The files used were satellite images, DEM files, maximum flows. The Geographic Information Systems were also used: ArcGis 10.5, QGIS 3.8.2, SASPLANET, GLOBALMAPER. The mathematical basis was the two-dimensional equations of St. Venant, which incorporates the turbulence and friction of the flow. The results are shown in three strategic points at the exit of the headwat...
6
artículo
Publicado 2011
Enlace
Enlace
This study is a geochemical investigation of the Andean and Foreland basins of the Amazon River at high spatial and time resolution, carried out within the framework of the HYBAM research program (Hydro-geodynamics of the Amazon Basin). Monthly sampling was carried out at 27 gauging stations located in the upper tributaries of the Amazon Basin (from north to south: the Napo, Marañon, Ucayali, Madre de Dios-Beni and Mamore Rivers). The aim of this paper is to estimate the present-day chemical weathering rate (CWR), as well as the flux of CO2 consumption from total and silicate weathering in the Andes and Foreland Amazon basins, and to discuss their distribution as a function of geomorphic and structural parameters. Based on the forward method, the Napo and other Ecuadorian basins present high silicate weathering rates in comparison with the other basins. We confirm that the Marañon and ...
7
artículo
Publicado 2017
Enlace
Enlace
The aim of the following review is to describe the seasonal reproductive behavior in male and female ungulates, and identify the determinants of reproductive synchrony. Intrinsic and extrinsic factors that influence the reproductive seasonality of ungulates analyzed. Intrinsic factors are related to the same individual such as genotypic and phenotypic characteristics, and implies that the reproductive aspects can not be extrapolated between species and breeds, and are modified by the action of external factors such as photoperiod, availability of food, temperature, latitude, among others. Among these factors are identified primarily photoperiod and food availability. The photoperiod and food availability are the main signals that determine melatonin levels, and this modulates the reproductive function. Photoperiod is related to the intensity of light and darkness that animals are exposed...
8
artículo
Publicado 2017
Enlace
Enlace
The aim of the following review is to describe the seasonal reproductive behavior in male and female ungulates, and identify the determinants of reproductive synchrony. Intrinsic and extrinsic factors that influence the reproductive seasonality of ungulates analyzed. Intrinsic factors are related to the same individual such as genotypic and phenotypic characteristics, and implies that the reproductive aspects can not be extrapolated between species and breeds, and are modified by the action of external factors such as photoperiod, availability of food, temperature, latitude, among others. Among these factors are identified primarily photoperiod and food availability. The photoperiod and food availability are the main signals that determine melatonin levels, and this modulates the reproductive function. Photoperiod is related to the intensity of light and darkness that animals are exposed...
9
artículo
Publicado 2017
Enlace
Enlace
The aim of the following review is to describe the seasonal reproductive behavior in male and female ungulates, and identify the determinants of reproductive synchrony. Intrinsic and extrinsic factors that influence the reproductive seasonality of ungulates analyzed. Intrinsic factors are related to the same individual such as genotypic and phenotypic characteristics, and implies that the reproductive aspects can not be extrapolated between species and breeds, and are modified by the action of external factors such as photoperiod, availability of food, temperature, latitude, among others. Among these factors are identified primarily photoperiod and food availability. The photoperiod and food availability are the main signals that determine melatonin levels, and this modulates the reproductive function. Photoperiod is related to the intensity of light and darkness that animals are exposed...
10
artículo
Publicado 2017
Enlace
Enlace
The aim of the following review is to describe the seasonal reproductive behavior in male and female ungulates, and identify the determinants of reproductive synchrony. Intrinsic and extrinsic factors that influence the reproductive seasonality of ungulates analyzed. Intrinsic factors are related to the same individual such as genotypic and phenotypic characteristics, and implies that the reproductive aspects can not be extrapolated between species and breeds, and are modified by the action of external factors such as photoperiod, availability of food, temperature, latitude, among others. Among these factors are identified primarily photoperiod and food availability. The photoperiod and food availability are the main signals that determine melatonin levels, and this modulates the reproductive function. Photoperiod is related to the intensity of light and darkness that animals are exposed...
11
tesis de maestría
Publicado 2021
Enlace
Enlace
Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Ciencias Ambientales
12
tesis de grado
Publicado 2024
Enlace
Enlace
El trabajo de investigación tiene como objetivo detectar anomalías geoquímicas en la subcuenca del Alto Marañón mediante el diseño e implementación de redes neuronales artificiales. Los resultados de la investigación se comparan con los publicados por el Servicio Geológico del Perú. La metodología aplicada en la investigación inicia con el entendimiento geológico de la subcuenca, teniendo en cuenta la geología regional del sector, la litología, la geología estructural y la geología económica; asimismo los yacimientos mineros existentes y proyectos. Con el entendimiento geológico del sector se analiza la información de los resultados de los análisis químicos de los sedimentos de quebrada y se elige los elementos pathfinders para la detección de anomalías geoquímicas, se realiza el tratamiento estadístico de los datos convertidos a base logarítmica para establece...
13
tesis de maestría
Publicado 2020
Enlace
Enlace
Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Economía de los Recursos Naturales y del Ambiente
14
artículo
The consumption of insects is a widespread practice among indigenous or native peoples of the Amazon. To assess the knowledge of the diversity of resources for entomophagy from the perspective of these peoples, testimonies or references about knowledge and feeding traditions of 100 people were collected in 37 localities in seven provinces of the department of San Martín in the basin of the Huallaga River. One cumulative species curve and the probability function of new species were estimated, then the probability of not finding a new species (99.5 %) to n100 was determined. The specimens that were captured in the field (54 %) were compared with representative specimens and databases, and the information provided by the participants was analysed to approximate the preliminary taxonomic locations of the remaining part of the sample. We found 46 resources for entomophagy and reported for f...
15
artículo
Publicado 2016
Enlace
Enlace
El presente ensayo tiene como objetivo examinar la situación de la actual gestión de los recursos hídricos en la cuenca del río Jequetepeque, Perú, desde una perspectiva nacional y regional de gestión integrada de recursos hídricos (GIRH). La problemática de la cuenca del río Jequetepeque se enmarca dentro del existente pluralismo normativo y de la valoración multidimensional del agua. La actividad minera en la cuenca ocasiona el mayor impacto en el manejo del recurso hídrico y compite por el uso del agua con otras actividades como las agrícolas, ganaderas y de consumo humano. Hay que prestarle especial atención a las escalas espaciales en términos de la variación geográfica y las posibles interacciones aguas arriba-aguas abajo, así como a la variación de la disponibilidad de agua, estacional, anual o de largo plazo. La cuenca del río Jequetepeque carece de GIRH. Para ...
16
artículo
Publicado 2016
Enlace
Enlace
El presente ensayo tiene como objetivo examinar la situación de la actual gestión de los recursos hídricos en la cuenca del río Jequetepeque, Perú, desde una perspectiva nacional y regional de gestión integrada de recursos hídricos (GIRH). La problemática de la cuenca del río Jequetepeque se enmarca dentro del existente pluralismo normativo y de la valoración multidimensional del agua. La actividad minera en la cuenca ocasiona el mayor impacto en el manejo del recurso hídrico y compite por el uso del agua con otras actividades como las agrícolas, ganaderas y de consumo humano. Hay que prestarle especial atención a las escalas espaciales en términos de la variación geográfica y las posibles interacciones aguas arriba-aguas abajo, así como a la variación de la disponibilidad de agua, estacional, anual o de largo plazo. La cuenca del río Jequetepeque carece de GIRH. Para ...
17
tesis de maestría
Publicado 2019
Enlace
Enlace
Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Recursos Hídricos
18
tesis de grado
Publicado 2022
Enlace
Enlace
La actual investigación se centra en evaluar y diseñar una propuesta de sistema de estabilización para defensa ribereña con gaviones del talud del Embarcadero Botafogo – Río Tambopata, provincia de Tambopata, departamento - Madre de Dios, estableciendo un sistema de gaviones el Gavión tipo colchón que contrarresta la erosión del suelo y el Gavión tipo caja que estabiliza el talud. Como estudios preliminares se tuvo la inspección in situ del talud realizando un levantamiento topográfico que nos proporcionará el perfil de la misma, para determinar las propiedades físico mecánicas del suelo del talud se auscultaron tres calicatas a lo largo de la zona de estudio ubicado entre las progresivas km 3+600m a km 3+800m del cual se realizaron los ensayos Caracterización del material (Contenido de Humedad, Análisis Granulométrico por tamizado de suelo, Límite Líquido, Límite P...
19
tesis de maestría
Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Recursos Hídricos
20
tesis de grado
Publicado 2019
Enlace
Enlace
El presente proyecto de tesis “Identificación y Evaluación de efectos causados en los ecosistemas riparios, para su conservación de la calidad bioambiental en la microcuenca de la quebrada Pucayacu, Moyobamba, 2017”, fue producto de un proceso continuo de investigación, teniendo como objetivo general; identificar y evaluar los efectos causados en los ecosistemas riparios, para su conservación de la calidad bioambiental en la microcuenca Pucayacu, y los objetivos específicos caracterizar la riqueza y abundancia florística, en función al ancho de franja de los ecosistemas riparios y analizar el efecto causado de los ecosistemas riparios, sobre la calidad bioambiental, utilizando comunidades florísticas como indicadores. Para ello se utilizó el método de análisis descriptivo de datos obtenidos en campo, donde la población está constituido por una superficie de 100 mts x 18...
