Determination of Environmental Flow of the Birrís River, Costa Rica

摘要: espanolEn Costa Rica el caudal ambiental se calcula como un 10% del aforo medio rio. Este porcentaje ha carecido de fundamento cientifico en relacion con las condiciones fluviales aptas para preservar los ecosistemas presentes cauces. Las concesiones agua diferentes usos han provocado impacto disponibilidad algunos lugares y epocas ano la calidad recurso transformando fisicoquimicas ecologicas Del sistema fluvial rio Birris, concesiona 20% uso consuntivo produccion agricola, humano riego, restante utiliza generacion hidroelectrica. Debido a baja sus aguas fecha no existen especies indicadoras lo que imposibilita enfoques tomen cuenta generar curvas preferencia. El presente trabajo utilizo enfoque hidrologico determinar Birris usando metodologia curva duracion caudales. Se baso analisis series datos clima obtenidas por 10 anos caudales diarios periodo tres anos. realizaron aforos biota flujo puntos distribuidos largo cauce principal ano. Finalmente, determino regimen basado valores medios mensuales EnglishIn Rica, the environmental flow corresponds to of average river flow. This percentage has lacked scientific basis in relation conditions suitable for preserving ecosystems present river. Water concessions main uses (human, agricultural and hydroelectric) have caused damages, transforming physical chemical channels. Of water River, is granted consumptive use as agricultural, human irrigation production, rest used hydroelectric generation. Due low quality its waters date there are indicator species that makes it impossible approaches take into account generate preference curves. The work hydrological approach determine River using duration curve methodology. It based on analysis climate data obtained years daily flows from period three years. Three outflows were made points distributed along channel over one year. Finally, was determined regime monthly values