The Analysis of Short-Term Dataset of Water Stable Isotopes Provides Information on Hydrological Processes Occurring in Large Catchments from the Northern Italian Apennines
| Autor: | Giovanni Martinelli, Federico Cervi, Andrea Dadomo |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
lcsh:Hydraulic engineering
Watershed 010504 meteorology & atmospheric sciences river water stable isotopes Geography Planning and Development 0207 environmental engineering Drainage basin 02 engineering and technology precipitation Aquatic Science 01 natural sciences Biochemistry lcsh:Water supply for domestic and industrial purposes Hydrology (agriculture) lcsh:TC1-978 northern Apennines Precipitation 020701 environmental engineering 0105 earth and related environmental sciences Water Science and Technology lcsh:TD201-500 geography geography.geographical_feature_category Stable isotope ratio Orography Catchment hydrology mean residence time Environmental science Physical geography Surface runoff |
| Zdroj: | Water Volume 11 Issue 7 Water, Vol 11, Iss 7, p 1360 (2019) |
| ISSN: | 2073-4441 |
| Popis: | This study discusses a dataset of water stable isotopes from precipitation (4 rain gauges) and surficial water (9 rivers) from the northern Italian Apennines, an area in which clay-rich bedrocks widely outcrop and the runoff response to precipitation events is very rapid. The dataset has been compiled starting from existing data that had previously been published in the literature and consists of monthly values of stable isotopes oxygen-18 (18O) and deuterium (2H) lasting over the period from January 2003 to December 2006 (precipitation) and from January 2006 to December 2007 (surficial water). For this period, mean residence times estimated by means of a sine-wave fitting technique make evident the significant differences over time spent by water molecules within the 9 catchments. Moreover, isotopic compositions of rivers deviated from those of precipitations revealing the influence of some catchment characteristics in differentiating the isotopic composition in rivers. Further correlations between mean residence times of river water and selected catchment characteristics reveal the role of orography and bedrocks in delaying the water molecules during their flow-paths. In addition, time series and cross&ndash correlation analyses indicate a certain control by the main watershed divide on the isotopic composition of river waters, which is reflected in a progressive isotopic variation with longitude. The study shows that, despite using a short-time dataset (2-years for surficial water) of sparse stable isotopes can provide remarkable indications for depicting hydrological processes in large catchments made up of clay-rich bedrocks. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|