| Title | Characterising the hydrological regime of an ungauged temporary river system: a case study |
| Abstract | Temporary streams are characterised by specific hydrological regimes, which influence ecosystem processes, groundwater and surface water interactions, sediment regime, nutrient delivery, water quality and ecological status. This paper presents a methodology to characterise and classify the regime of a temporary river in Southern Italy based on hydrological indicators (HIs) computed with long-term daily flow records. By using a principal component analysis (PCA), a set of non-redundant indices were identified describing the main characteristics of the hydrological regime in the study area. The indicators identified were the annual maximum 30- and 90-day mean (DH4 and DH5), the number of zero flow days (DL6), flow permanence (MF) and the 6-month seasonal predictability of dry periods (SD6). A methodology was also tested to estimate selected HIs in ungauged river reaches. Watershed characteristics such as catchment area, gauging station elevation, mean watershed slope, mean annual rainfall, land use, soil hydraulic conductivity and available water content were derived for each site. Selected indicators were then linked to the catchment characteristics using a regression analysis. Finally, MF and SD6 were used to classify the river reaches on the basis of their degree of intermittency. The methodology presented in this paper constitutes a useful tool for ecologists and water resource managers in the Water Framework Directive implementation process, which requires a characterisation of the hydrological regime and a 'river type' classification for all water bodies. |
| Source | Environmental science and pollution research international, pp. 1–17 |
| Keywords | Flow regimeHydrological indicesPrincipal component analysisRegression analysisTemporary riversUngauged catchments |
| Journal | Environmental science and pollution research international |
| Editor | Springer, Berlin, Germania |
| Year | 2016 |
| Type | Articolo in rivista |
| DOI | 10.1007/s11356-016-7169-0 |
| Authors | D'Ambrosio, Ersilia; D'Ambrosio, Ersilia; de Girolamo, Anna Maria; Barca, Emanuele; Ielpo, Pierina; Ielpo, Pierina; Rulli, Maria Cristina |
| Text | 359791 2016 10.1007/s11356 016 7169 0 Scopus 2 s2.0 84978052419 Flow regime Hydrological indices Principal component analysis Regression analysis Temporary rivers Ungauged catchments Characterising the hydrological regime of an ungauged temporary river system a case study D Ambrosio, Ersilia; D Ambrosio, Ersilia; de Girolamo, Anna Maria; Barca, Emanuele; Ielpo, Pierina; Ielpo, Pierina; Rulli, Maria Cristina Politecnico di Milano; Istituto di Ricerca Sulle Acque, Bari; Consiglio Nazionale delle Ricerche Temporary streams are characterised by specific hydrological regimes, which influence ecosystem processes, groundwater and surface water interactions, sediment regime, nutrient delivery, water quality and ecological status. This paper presents a methodology to characterise and classify the regime of a temporary river in Southern Italy based on hydrological indicators HIs computed with long term daily flow records. By using a principal component analysis PCA , a set of non redundant indices were identified describing the main characteristics of the hydrological regime in the study area. The indicators identified were the annual maximum 30 and 90 day mean DH4 and DH5 , the number of zero flow days DL6 , flow permanence MF and the 6 month seasonal predictability of dry periods SD6 . A methodology was also tested to estimate selected HIs in ungauged river reaches. Watershed characteristics such as catchment area, gauging station elevation, mean watershed slope, mean annual rainfall, land use, soil hydraulic conductivity and available water content were derived for each site. Selected indicators were then linked to the catchment characteristics using a regression analysis. Finally, MF and SD6 were used to classify the river reaches on the basis of their degree of intermittency. The methodology presented in this paper constitutes a useful tool for ecologists and water resource managers in the Water Framework Directive implementation process, which requires a characterisation of the hydrological regime and a river type classification for all water bodies. Published version http //www.scopus.com/record/display.url eid=2 s2.0 84978052419 origin=inward Characterising the hydrological regime of an ungauged temporary river system a case study pdf del lavoro in versione ACCEPTED VERSION ACCESSO PUBBLICO Characterising The Hydrological R.pdf Articolo in rivista Springer 0944 1344 Environmental science and pollution research international Environmental science and pollution research international Environ. sci. pollut. res. int. Environmental science and pollution research international. Environmental science and pollution research international Print Environmental science and pollution research Print ESPR Print ersiliadambrosio D AMBROSIO ERSILIA annamaria.degirolamo DE GIROLAMO ANNA MARIA emanuele.barca BARCA EMANUELE pierina.ielpo IELPO PIERINA |
