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dc.contributor.authorVega-Jácome, Fiorella
dc.contributor.authorLavado-Casimiro, W.
dc.contributor.authorFelipe-Obando, Oscar
dc.date.accessioned2019-07-20T00:15:59Z
dc.date.available2019-07-20T00:15:59Z
dc.date.issued2018-04
dc.identifier.urihttp://repositorio.senamhi.gob.pe/handle/20.500.12542/44
dc.description.abstractHydrological changes were assessed considering possible changes in precipitation and regulation or hydraulic diversion projects developed in the basin since 1960s in terms of improving water supply of the Rimac River, which is the main source of fresh water of Peru’s capital. To achieve this objective, a trend analysis of precipitation and flow series was assessed using the Mann-Kendall test. Subsequently, the Eco-flow and Indicators of Hydrologic Alteration (IHA) methods were applied for the characterization and quantification of the hydrological change in the basin, considering for the analysis, a natural period (1920–1960) and an altered period (1961–2012). Under this focus, daily hydrologic information of the “Chosica R-2” station (from 1920 to 2013) and monthly rainfall information related to 14 stations (from 1964 to 2013) were collected. The results show variations in the flow seasonality of the altered period in relation to the natural period and a significant trend to increase (decrease) minimum flows (maximum flows) during the analyzed period. The Eco-flow assessment shows a predominance of Eco-deficit from December to May (rainy season), strongly related to negative anomalies of precipitation. In addition, a predominance of Eco-surplus was found from June to November (dry season) with a behavior opposite to precipitation, attributed to the regulations and diversion in the basin during that period. In terms of magnitude, the IHA assessment identified an increase of 51% in the average flows during the dry season and a reduction of 10% in the average flows during the rainy season (except December and May). Furthermore, the minimum flows increased by 35% with shorter duration and frequency, and maximum flows decreased by 29% with more frequency but less duration. Although there are benefits of regulation and diversion for developing anthropic activities, the fact that hydrologic alterations may result in significant modifications in the Rimac River ecosystem must be taken into account.en_US
dc.formatapplication/pdf
dc.language.isoengen_US
dc.publisherSpringer-Verlag Wienen_US
dc.relation.ispartofurn:issn:0177-798X
dc.rightsinfo:eu-repo/semantics/openAccesses_PE
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/*
dc.sourceServicio Nacional de Meteorología e Hidrología del Perúes_PE
dc.sourceRepositorio Institucional - SENAMHIes_PE
dc.subjectFlow modelingen_US
dc.subjectHydrological changeen_US
dc.subjectPrecipitation (climatology)en_US
dc.subjectRiver flowen_US
dc.subjectRiver systemen_US
dc.subjectSeasonalityen_US
dc.subjectTrend analysisen_US
dc.subjectPeruen_US
dc.subjectRimac Basinen_US
dc.titleAssessing hydrological changes in a regulated river system over the last 90 years in Rimac Basin (Peru)en_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.identifier.isni0000 0001 0746 0446
dc.description.peerreviewPor pares
dc.identifier.doihttps://doi.org/10.1007/s00704-017-2084-y
dc.source.volume132es_PE
dc.source.issue1-2es_PE
dc.source.initialpage347es_PE
dc.source.endpage362es_PE
dc.source.journalTheoretical and Applied Climatologyes_PE
dc.description.fundingThe present study was made under the cooperation project between the National Hydrology and Meteorology Service of Peru (SENAMHI-PER?) and SEDAPAL, and it is supported by SENAMHI-PER?. The authors appreciate the facilities given by the Hydrology Department of SENAMHI.es_PE


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