caa a22 4500 445815213 CHVBK 20180317145225.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10040-011-0726-1 doi (NATIONALLICENCE)springer-10.1007/s10040-011-0726-1 Modeling of bore hydrographs to determine the impact of climate and land-use change in a temperate subhumid region of southeastern Australia [Elektronische Daten] [Yohannes Yihdego, John Webb] Modélisation d'hydrogrammes de puits pour déterminer l'impact des variations climatiques et modes d'utilisation du sol dans une région tempérée semi-humide d'Australie du Sud To determine the relative impact of climate and human intervention on groundwater elevations in western Victoria, southeast Australia, bore hydrograph fluctuations in three aquifers were modelled using a transfer function noise model (PIRFICT) and an auto-regressive model (HARTT), which give generally comparable results. Most of the groundwater-level fluctuations (>90%) are explained by climatic variation, particularly rainfall. The overall non-climate-related trend in groundwater level is downward and small but statistically significant (−0.04 to −0.066 m/yr), and is probably due to the widespread replacement of grazing land by wheat and canola cultivation, as these crops use more water than pasture. A large non-climate-related trend (−0.30 m/yr) for bores in an irrigation area is mainly related to groundwater extraction. The response time of the system is rapid (only 4.85 years on average), much faster than previously estimated. Rates of groundwater flow are much slower; groundwater ages are up to ~35,000 years. Response times effectively represent the time for the system to move to a new state of hydrologic equilibrium; this prediction of the time scale of the impacts of land-use change on groundwater resources will allow the development of better strategies for groundwater management. Springer-Verlag, 2011 Australia nationallicence Groundwater dynamics nationallicence Spatio-temporal modeling nationallicence Land use nationallicence Climate change nationallicence Yihdego Yohannes Environmental Geosciences, La Trobe University, 3086, Melbourne, Victoria, Australia aut Webb John Environmental Geosciences, La Trobe University, 3086, Melbourne, Victoria, Australia aut Hydrogeology Journal Springer-Verlag 19/4(2011-06-01), 877-887 1431-2174 19:4<877 2011 19 10040 https://doi.org/10.1007/s10040-011-0726-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-011-0726-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yihdego Yohannes Environmental Geosciences, La Trobe University, 3086, Melbourne, Victoria, Australia aut NATIONALLICENCE 700 1- Webb John Environmental Geosciences, La Trobe University, 3086, Melbourne, Victoria, Australia aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/4(2011-06-01), 877-887 1431-2174 19:4<877 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer