نتایج جستجو برای: karst

تعداد نتایج: 4636  

2010
Zoran Stevanović

Southeastern Europe is known worldwide as classic karst terrain. In the Alpine orogenic belt the karstifi ed carbonate rocks are either dominant, as in the Dinarides, or widely distributed, as in the Carpathian-Balkans, Hellenides or Pindes. Concerning karstic groundwater resources, this region is by far the richest in all of Europe. Some areas, such as southern Montenegro, are characterized by...

2007
YonglI gao

Several Geographic Information Systems (GIS)-based Karst Feature Databases (KFDs) have been established in many karst regions and countries (Cooper et al., 2001; Florea et al., 2002; Lei et al., 2001). However, the absence of comprehensive database models and standard metadata impeded the data compatibility and management (Gao et al., 2005a). A KFD has been developed in Minnesota in the past fe...

2012
Muhammad Farooq Samgyu Park Young Soo Song Jung Ho Kim Mohammad Tariq Adekunle Abraham

Karst voids were encountered during road construction in Yongweol-ri, South Korea Attempts to determine the extent of the karst voids through drilling was expensive, time-consuming and too dangerous An electrical resistivity survey was thus carried out to investigate current subsurface geology beneath the proposed road network This investigation was aimed at imaging karstic voids and detecting ...

2017
Guillaume Rongier Pauline Collon-Drouaillet Marco Filipponi Pauline Collon

Karst conduit shapes have a high influence on fluid flows. As these underground hidden systems are partially inaccessible, their stochastic simulation is an essential tool to assess the uncertainties related to these highly exploited water resources. The Object-Distance Simulation Method (ODSIM) is a hybrid dual-scale approach that has been recently proposed to model geological underground stru...

2009
Douglas G. Boyer Ewa Kuczynska Ron Fayer

A major mode of transmission of Cryptosporidium parvum, a widespread waterborne pathogen, is via contaminated drinking and recreational waters. Oocyst transport to surface water can occur by deposition of manure directly in the water or by wash off in surface runoff. Oocyst transport to groundwater is less straightforward and requires that the oocysts move through soil and bedrock to reach the ...

2012
A. J. Long B. J. Mahler

Many karst aquifers are rapidly filled and depleted and therefore are likely to be susceptible to changes in shortterm climate variability. Here we explore methods that could be applied to model site-specific hydraulic responses, with the intent of simulating these responses to different climate scenarios from high-resolution climate models. We compare hydraulic responses (spring flow, groundwa...

2009
Yonghong Hao Yajie Wang Yuen Zhu Yi Lin Jet-Chau Wen Tian-Chyi J. Yeh

Discharge from the largest karst spring in north China, the Niangziguan Springs, has been declining since the 1950s. This paper examines the response of these springs to climatic change and anthropogenic infl uence by attempting a model-based discrimination between phases in the stream discharge record. In Niangziguan Springs Basin, the exploitation of karst groundwater began in 1979. According...

2010
P. Karst K K Janardhanan

Mushrooms represent a major and untapped source of potent new pharmaceutical products. The antioxidant, antiinflammatory, antinociceptive, antimutagenic, anticarcinogenic, antitumour, hepatoprotective, nephroprotective and cardioprotective activities of the methanolic extract of Ganoderma lucidum (Fr.) P. Karst. collected from tropical South India were evaluated for the revalidation of its util...

2010
Pierre Paquin Pierre Provost

1Cave and Endangered Invertebrate Research Laboratory, SWCA Environmental Consultants, 4407 Monterey Oaks Boulevard, Building 1, Suite 110, Austin, Texas 78749, U.S.A. Email: [email protected] 22016 Boulevard Gouin est Montréal, Québec, Canada, H2B 1W9. Email: [email protected] 3This is publication no. 20 of the Karst Biosciences and Environmental Geophysics Research Laboratories, SWCA En...

2013
Kenneth S. Johnson

Introduction The current study summarizes years of investigations of salt karst and resultant collapse features in and around the Anadarko Basin of western Oklahoma and the Texas Panhandle. These investigations have involved integrated studies of: 1) the subsurface distribution and thickness of Permian salt beds; and 2) field studies to identify areas where outcropping strata are disrupted and ...

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