نتایج جستجو برای: karstic groundwater potential modeling

تعداد نتایج: 1448468  

Journal: :Ground water 2012
Clark R Wilson Bridget Scanlon John Sharp Laurent Longuevergne Hongqiu Wu

We report on a field test of a transportable version of a superconducting gravimeter (SG) intended for groundwater storage monitoring. The test was conducted over a 6-month period at a site adjacent to a well in the recharge zone of the karstic Edwards Aquifer, a major groundwater resource in central Texas. The purpose of the study was to assess requirements for unattended operation of the SG i...

Journal: :The Science of the total environment 2013
Ruopu Li James W Merchant

Modeling groundwater vulnerability to pollution is critical for implementing programs to protect groundwater quality. Most groundwater vulnerability modeling has been based on current hydrogeology and land use conditions. However, groundwater vulnerability is strongly dependent on factors such as depth-to-water, recharge and land use conditions that may change in response to future changes in c...

2014
Diana M. P. Galassi Paola Lombardo Barbara Fiasca Alessia Di Cioccio Tiziana Di Lorenzo Marco Petitta Piero Di Carlo

Earthquakes are among the most destructive natural events. The 6 April 2009, 6.3-Mw earthquake in L'Aquila (Italy) markedly altered the karstic Gran Sasso Aquifer (GSA) hydrogeology and geochemistry. The GSA groundwater invertebrate community is mainly comprised of small-bodied, colourless, blind microcrustaceans. We compared abiotic and biotic data from two pre-earthquake and one post-earthqua...

Journal: Geopersia 2016

Nowadays the use of remote sensing and Geographic Information System (GIS) is one of the most powerful cost effective tools to identify and discover the available groundwater resources. In this paper, Lithological Units, Lineaments, Slope, Topography, Drainage density, Vegetation and Isohyets lines have been achieved by stations and through remote sensing and GIS techniques. All layers of diffe...

2004
Shu-Guang Li Qun Liu Soheil Afshari

In this paper, we present a nature-inspired, hierarchical patch dynamics paradigm for modeling complex groundwater systems across multiple scales – one that has the potential to substantially alleviate the infamous “curse of dimensionality” and the associated computational bottlenecks. The new modeling paradigm is inspired by the observations on how biological systems have been doing a great jo...

2009
Yonghong Hao Yuen Zhu Ying Zhao Wei Wang Xin Du Tian-Chyi J. Yeh

One of the largest karst springs in North China, the Jinci Springs, dried up and has remained dry since 1994. We develop a correlation analysis with time-lag and a regression analysis with time-lag to study the relation between spring flow and precipitation. This allows us to obtain a better understanding of karst hydrological processes by differentiating the contribution of variation in precip...

2016
Ali Nawaz Witoon Purahong Robert Lehmann Martina Herrmann Kirsten Küsel Kai U. Totsche François Buscot Tesfaye Wubet

Fungi are one important group of eukaryotic microorganisms in a diverse range of ecosystems, but their diversity in groundwater ecosystems is largely unknown. We used DNA-based pyro-tag sequencing of the fungal internal transcribed spacer (ITS) rDNA gene to investigate the presence and community structure of fungi at different sampling sites of two superimposed limestone aquifers ranging from 8...

2010
W G Darling D C Gooddy J Riches

The Swanscombe area of Kent, SE England represents a typical example of a heavily quarried Chalk area currently undergoing re-development. Because the Chalk is also an important aquifer, a good understanding of groundwater movement is required if environmental impacts are to be minimised and the water resource maximised. In particular, the nature of the relationship between the River Darent and...

Journal: :Environmental Modelling and Software 2006
Shu-Guang Li Qun Liu Soheil Afshari

In this paper, we present an object-oriented hierarchical patch dynamics paradigm (HPDP) for modeling complex groundwater systems across multiple-scales e one that has the potential to significantly alleviate the infamous ‘‘curse-of-dimensionality’’ and the associated computational bottlenecks. The HPDP takes advantage of hierarchy theory, divides and conquers complexities, and decouples scale-...

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