Examinando por Materia "Runoff"

Mostrando 1 - 2 de 2
  • Miniatura
    PublicaciónAcceso abierto
    Relationship between hydrological, physical and chemical characteristics present in rainwater runoff sediments
    (Universidad del Valle, 2018-07-19) Pimiento, Maria Alejandra; Rivera, David Santiago; Lara Borrero, Jaime Andres; Torres Abello, Andres Eduardo
    (Eng) The objective of this work was to establish possible relationships between rainfall characteristics and physical and chemical characteristics of sediments in an experimental catchment in Bogota city (tropical mountain Andean region). The sediments were collected fortnightly for five months, from the two sand traps of the constructed wetland of the Pontificia Universidad Javeriana, Bogotá. We collected the sediments with traps specially designed for the study site. The results show a mean diameter (D50) of 128 μm , mean concentrations of Cr = 36 mg/kg, Cu = 115 mg/kg, Pb = 273 mg/kg and Zn = 1173 mg/ kg. We found a relationship between rainfall and sediment characteristics, which eventually could guide practices for sediment usages: (i) a reduced number of dry days is related to higher particle diameters and lower concentrations of metals; (ii) higher magnitudes of rainfall intensities and total heights are related to a lower number of particles with large grain sizes reaching the sand traps.
  • Miniatura
    PublicaciónAcceso abierto
    Uso de interpolaciones en tiempo real como una nueva herramienta para evaluar los costos Energéticos para la producción de papa en diferentes espacios de cultivo. Una herramienta para producción limpia.
    (2015-03-19) Muñoz, Fernando Felipe
    Se presenta un análisis que evalúa las necesidades y costos de energía (agroquímicos) para la producción de papa mediante un análisis de distribución en diferentes pendientes de cultivo. Se desarrolla un concepto de interpolación de energía como herramienta para evaluar los nutrientes a través de la pendiente. Las interpolaciones son un método gráfico para integrar de manera precisa múltiples evaluaciones de distancia, de modo que se puede determinar una unidad en una distancia determinada. Finalmente, se evalúan las estrategias para una distribución justa según la pendiente y distancia a los cultivos de papa y para mantener un menor impacto en el agro ecosistema. Abstract An analysis is presented which evaluate the energy needs and costs (agrochemical) for the production of potato by an analysis of distribution in different cultivation inclinations. A concept of interpolation of energy like a tool to evaluate the nutrients through the slope is developed. The interpolations are a graphic method to integrate in a precise way multiple distance evaluations, so one can determine a unit in a certain distance. Finally, strategies are evaluated for a fair distribution according to the slope and distance to potato cultivations to keep a smallest impact in the agro ecosystem.