Published News Hydrogeology

After Major Earthquake: A Global Murmur, Then Unusual Silence

Posted By Kondwani in Hydrogeology

In the global aftershock zone that followed the major April 2012 Indian Ocean earthquake, seismologists noticed an unusual pattern. The magnitude (M) 8.6 earthquake, a strike-slip event at intraoceanic tectonic plates, caused global seismic rates of M≥4.5 to rise for several days, even at distances thousands of kilometers from the mainshock site. However, the rate of M≥6.5 seismic activity subseq -

Sea level periodic change and its impact on submarine groundwater discharge rate in coastal aquifer

Posted By Mahboubeh in Hydrogeology

This study focused on the interaction between groundwater and seawater and the effect of temporal scale of sea level fluctuation on submarine groundwater discharge (SGD) rate. The numerical code FEFLOW (Diersch, 2005) was used to evaluate the influence of periodic changes in sea level on an increase in SGD at various time scales from diurnal to glacial cycles. Simulation results showed that not o -

Positive and negative impacts of five Austrian gravel pit lakes on groundwater quality

Posted By Mahboubeh in Hydrogeology

Groundwater-fed gravel pit lakes (GPLs) affect the biological, organic, and inorganic parameters of inflowing groundwater through combined effects of bank filtration at the inflow, reactions within the lake, and bank filtration at the outflow. GPLs result from wet dredging for sand and gravel and may conflict with groundwater protection programs by removing the protective soil cover and exposing -

Water Law: With Locals at the Helm, Kansas Charts New Course for Groundwater Management

Posted By Pierce in Hydrogeology

In western Kansas, crops are irrigated using water primarily from the Ogallala Aquifer, a finite and shrinking source of groundwater. A groundwater district in the state's northwest will be the first to test a new law giving local residents the power to shape their own restrictions on water pumping. -

The uncertainty associated with estimating future groundwater recharge

Posted By Mahboubeh in Hydrogeology

Global climate models (GCMs) project significant changes to regional and globally-averaged precipitation and air temperature, and these changes will likely have an associated impact on groundwater recharge. A common approach in recent climate change-impact studies is to employ multiple downscaled climate change scenarios to drive a hydrological model and project an envelope of recharge possibilit -

New Technique Measures Evaporation Globally

Posted By Pierce in Hydrogeology

Researchers at Columbia Engineering and Boston University have developed the first method to map evaporation globally using weather stations, which will help scientists evaluate water resource management, assess recent trends of evaporation throughout the globe, and validate surface hydrologic models in various conditions. The study was published in the April 1 online Early Edition of Proceedings -

Researchers discover plants are enormous water users

Posted By Pierce in Hydrogeology

A new study published today in Nature by researchers at the University of New Mexico indicates the immense amount of fresh water used by plants and its movement during their life cycle has significant implications for future predictions about climate change. -

Estimating the causal effect of water scarcity on the groundwater use efficiency of rice farming in South India

Posted By Mahboubeh in Hydrogeology

There is no consensus among researchers on the influence of scarcity on common pool resource use: some suggest that scarcity leads to prudent use, whereas others suggest that it will cause over-extraction of resources. This issue is particularly of interest for developing countries, where natural resources are becoming scarce at an alarming rate. This paper investigates the causal association bet -

Groundwater modelling for the assessment of water management alternatives

Posted By Mahboubeh in Hydrogeology

Rise in groundwater level followed by waterlogging and secondary salinisation has become a serious problem in canal irrigated areas located in arid and semi-arid regions of the world. To solve the problem, the groundwater model SGMP was applied in a waterlogged area of Haryana State of India in which about 500,000 ha has already waterlogged resulting in reduced crop yield and abandonment of agric -