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Université de Neuchâtel

A statistical time series analysis of hydro-climatic stress on karst aquifer system (Switzerland)

Kimmeier, Francesco ; Bouzelboudjen, Mahmoud ; Eisenlohr, Laurent ; Rossier, Yvan ; Zwahlen, François

In: 3rd International Conference on Future Groundwater Resources At Risk, Lisbon, Portugal, 2001, p. 659-671

In order to determine the impact of climatic variations on several spring discharge, five karst aquifer systems were chosen in the Neuchâtel Jura (three basins over an area of 359 km2) and in the Prealps (2 basins of 4 and 10 km2 respectively). The records of air temperature, precipitation and groundwater discharge vary between 13 and 91 years. Statistical trend analyses...

Université de Neuchâtel

Impact of climate change on irrigation requirements in terms of groundwater resources

Zhou, Yu ; Zwahlen, François ; Wang, Yanxin ; Li, Yilian

In: Hydrogeology Journal, 2010, vol. 18, no. 7, p. 1571-1582

Climate change affects not only water resources but also water demand for irrigation. A large proportion of the world’s agriculture depends on groundwater, especially in arid and semi-arid regions. In several regions, aquifer resources face depletion. Groundwater recharge has been viewed as a by-product of irrigation return flow, and with climate change, aquifer storage of such flow will be...

Université de Neuchâtel

Differential Transport of Atrazine and Glyphosate in Undisturbed Sandy Soil Column

Zhou, Yu ; Wang, Y. ; Hunkeler, Daniel ; Zwahlen, François ; Boillat, J.

In: Differential Transport of Atrazine and Glyphosate in Undisturbed Sandy Soil Column, 2010, vol. 19, p. 365-377

With increasing awareness and concern for environmental quality, it is important to study the fate of pesticides in the subsurface. Laboratory studies were conducted to determine the behavior of atrazine and glyphosate within the root zone of an undisturbed sandy soil in Jianghan Plain, central China. Chloride as a tracer for water movement was applied to the soil as KCl for 26 hours before...