نتایج جستجو برای: karstic groundwater potential modeling

تعداد نتایج: 1448468  

Journal: :Water 2021

The drinking and irrigation water scarcity is a major global issue, particularly in arid semi-arid zones. In rural areas, groundwater could be used as an alternative additional supply source order to reduce human suffering terms of scarcity. this context, the purpose present study facilitate potentiality mapping via spatial-modelling techniques, individual ensemble machine-learning models. Rand...

Journal: :Computers & Geosciences 2006
J. J. Carrera-Hernández S. J. Gaskin

Geographic Information Systems (GIS) are used to store, manipulate and visualize both spatial and non-spatial data. Because of their data manipulating capabilities, GIS have been linked to different simulation models in different research areas and are commonly used for both surface and ground water modeling. Unfortunately this has been done mainly with proprietary GIS which are expensive and w...

2013
Daozhi Han Dong Sun Xiaoming Wang

Multiphase flow phenomena are ubiquitous. Common examples include coupled atmosphere and ocean system (air and water), oil reservoir (water, oil and gas), cloud and fog (water vapor, water and air). Multiphase flows also play an important role in many engineering and environmental science applications. In some applications such as flows in unconfined karst aquifers, karst oil reservoir, proton ...

2011
Guangrong Shen Xiumei Huang Pei Zhou Lumei Wang Yuee Zhi

This paper analyzes the characteristics of the NPS nitrogen pollution of the groundwater in Guoyuan Village, Pudong District, Shanghai. And the associated effects on the surface and groundwater around the study area are discussed in detail based on the successive observed data, DNDC and L-THIA model. The results show that both of the surface and groundwater are polluted so seriously that they a...

ژورنال: سلامت و محیط زیست 2018

Background and Objective: Groundwater resources are very important for the survival of living beings. Hence, groundwater modeling has a special importance in water management and planning of each region .In this study, numerically simulation of Hamedan–Bahar aquifer flow path was done by GMS software using geological, hydraulic and hydrologic information. Materials and Methods: First, a 3D hyd...

2003
G. R. Walter A. M. Geddis R. Murray H. W. Bentley

The occurrence of halogenated volatile organic compounds (HVOCs) in groundwater beneath several municipal solid waste landfills in Tucson, Arizona in the absence of significant liquid phase movement has suggested that vapor phase transport may be the principal process transporting HVOCs from the vadose zone into the water table. The results of mathematical modeling of these transport processes ...

2016
Mahfuzur R Khan Mohammad Koneshloo Peter S K Knappett Kazi M Ahmed Benjamin C Bostick Brian J Mailloux Rajib H Mozumder Anwar Zahid Charles F Harvey Alexander van Geen Holly A Michael

Many of the world's megacities depend on groundwater from geologically complex aquifers that are over-exploited and threatened by contamination. Here, using the example of Dhaka, Bangladesh, we illustrate how interactions between aquifer heterogeneity and groundwater exploitation jeopardize groundwater resources regionally. Groundwater pumping in Dhaka has caused large-scale drawdown that exten...

Introduction: Iran's plateau, especially in different regions of Iran, is composed of different climates, while in its southern areas summer temperatures reach 50 degrees above zero, the Caspian Mediterranean region is running wet weather. One of the most important indicators of climate difference is the issue of water. Today, water supply is one of the most important concerns to realize the go...

2016
Liangping Li Guanxing Huang Athanasios Loukas

Methods based on two-point geostatistics have been routinely used to interpolate random variables such as groundwater level and concentration and to estimate their values at un-sampled locations. These methods use the observed data to analyze spatial two-point correlations and ignore the higher order moments that may play a key role in the characterization of complex patterns. In this work, a m...

2014
Giuseppe Sappa Sibel Ergul Flavia Ferranti

Contamination of groundwater by naturally occurring arsenic has recently become a disturbing environmental problem in Viterbo area, Central Italy. Arsenic concentrations in most of the public supply networks exceed the maximum allowable limit of 10 μg/l (WHO) for drinking water. The primary purpose of this paper is to obtain a better understanding of the factors contributing to the high levels ...

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