PERSONAL DE APOYO
MAROÑAS Miriam Edith
capítulos de libros
Título:
LA PUESTA EN VALOR DE LOS SERVICIOS ECOSISTÉMICOS QUE OFRECEN LOS ARROYOS DE LLANURA COMO UNA MEDIDA DE MITIGACIÓN DE LAS INUNDACIONES: EL CASO DEL AO DEL GATO EN EL PARTIDO DE LA PLATA
Autor/es:
GÓMEZ, N.; RODRIGUES CAPÌTULO, A.; COLAUTTI, D. C.; MARIÑELARENA, A. J.; LICURSI, M.; COCHERO, J.; ARMENDARIZ, L.; MAROÑAS, M. E.; DONADELLI, J.; JENSEN, ROBERTO; GARCÍA DE SOUZA, J.; MAIZTEGUI, T.; GARCÍA, I. D.; SATHICQ, M. B.; SUAREZ, J.; CORTESE, B.
Libro:
Ecología y manejo de ecosistemas acuáticos pampeanos (VIII EMEAP)
Editorial:
EMEAP
Referencias:
Año: 2016; p. 39 - 52
Resumen:
Hydrological ecosystem services involve the regulation of water flows, the reduction of the flooding impact, the soil erosion and the sediment accumulation in the watercourses, also including the maintenance and improvement of the water quality, the aquiferous recharge and the aquatic habitats. The impermeability of the soil due to urbanization, the acceleration of drainings, the building of obstacles to the water flow in streams and rivers together with pollution are recognized as the main causes contributing to magnify the consequences of storms in urban and suburban areas. With the aim of showing the consequences of this type of interferences and the lossesin services and goods of the Pampean plain water flows, the case of the Gato stream is here explained. Its basin isinhabited by over 400,000 people, with approximately 50% of urbanized area and a deficient drainage system. The occupation of the alluvial valley and the lack of an integral plan for flooding risks are acknowleged as the main causes for the recurrent floods in this basin. The extreme expression of these events was observed on 2nd and 3rd April, 2013, as a consequence of a meteorological phenomenon which reached over 301 mm of water in four hours with an averageintensity of 100.3 mm/h, causing the death of 89 people and over 2200 evacuated people together with an immense material loss. A study carried out in three areas of the basin, in order to identify the main causes that reduce the ecological quality of the stream, revealed that in sectors of the midand low basin there is a deficient water quality with habitat destruction and the consequent loss of biodiversity. On the other hand, a detailed analysis of a fluvial overflow swamp, located on the upper basin, demonstrated the capacity of these areas of the basin which contribute to the improvement of water quality functioning as green filters and generating a proper environment to host diverse flora and fauna. They also retain water during storms and favor the regulation of the increase of the downstream flow contributing to alleviate the effects of floods. The review of the draining management techniques of the basin is essential. It is, therefore, necessary to count with the integral knowledge of the structure and functioning of the different areas of the basin. It is also very important to make the population aware of the necessity of their contribution, in order to regain the ecosystem services which have been partially or completely lost.