نتایج جستجو برای: groundwater table

تعداد نتایج: 144203  

2010
Qiaona Guo Hailong Li Michel C. Boufadel Youness Sharifi

[1] This paper investigated the interaction of groundwater and seawater in a tidally influenced gravel beach. Field observations of water table, pore water salinity were performed. The two‐dimensional finite element model MARUN was used to simulate observed water table and salinity. Based on field observations and model calibrations, a two‐layered beach structure was identified which is charact...

2014
Sandeep Kumar K. K. Singh

Abstract: Need of artificial recharging of groundwater is gaining importance due to sharp decline of groundwater table at many places. For artificial recharging it is desirable that the injected water to the groundwater system is devoid of the sediments and other foreign materials which may hamper the quality of groundwater. This necessitates the storm water runoff to pass through the filtratio...

2016
Mohammad Ali Baghapour Amir Fadaei Nobandegani Nasser Talebbeydokhti Somayeh Bagherzadeh Ata Allah Nadiri Maryam Gharekhani Nima Chitsazan

BACKGROUND Extensive human activities and unplanned land uses have put groundwater resources of Shiraz plain at a high risk of nitrate pollution, causing several environmental and human health issues. To address these issues, water resources managers utilize groundwater vulnerability assessment and determination of protection. This study aimed to prepare the vulnerability maps of Shiraz aquifer...

2015
Limin Duan Tingxi Liu Xixi Wang Yanyun Luo

Understanding groundwater-vegetation interactions is crucial for sustaining fragile environments of desert areas such as the Horqin Sandy Land (HSL) in northern China. This study examined spatio-temporal variations in the water table and the associated vegetation status of a 9.71 km2 area that contains meadowland, sandy dunes, and intermediate transitional zones. The depth of the water table an...

2008
Kathleen M. Bailey Barbara L. Bedford

Hydrochemical patterns across groundwater-fed wetlands, especially carbonate and redox gradients, can influence phosphorus (P) availability by controlling its distribution among different soil pools. We explored these linkages by comparing shallow (5–20 cm) soil properties along groundwater flowpaths in two rich fens, a marl fen, and a poor fen. Organic matter content, bulk density, and total e...

2014
Wendy Jeanne Pabich Harold F. Hemond

Denitrification is a microaerophilic, microbially-mediated process, by which nitrate is reduced to biologically-unavailable N2 gas; the reaction is generally coupled to the oxidation of organic carbon. We hypothesized that denitrification rates in groundwater in the Waquoit Bay watershed on Cape Cod, USA, were controlled by both nitrate and dissolved organic carbon (DOC) concentrations, and tha...

2008
Melissa Schlegel

rise of groundwater levels in unconfined aquifers can cause dryland salinity to increase by several processes including; dissolution of windblown halite, and incorporation of saline clay pore water. The primary process of increased groundwater salinity is evaporation of shallow groundwater as it rises to within a few meters of the ground surface. in murray Basin, australia, the effect of drylan...

Journal: :journal of water sciences research 2010
n faghihi f kave h babazadeh

regarding to increased use of groundwater resources, it seems necessary to have more accurate knowledge of characteristics of aquifers in order to improved usage and accurate management of these resources. in this study, we simulated groundwater flow of qazvin aquifer usingvisual modflow model, collecting data and statistics, as well as using different studies. the simulation model has operated...

2012
Fardin Boustani

Groundwater is one of the most important water resources in Fars province. Based on this study, 95 percent of the total annual water consumption in Fars is used for agriculture, whereas the percentages for domestic and industrial uses are 4 and 1 percent, respectively. Population growth, urban and industrial growth, and agricultural development in Fars have created a condition of water stress. ...

2013
Fardin Boustani

Groundwater is one of the most important water resources in Fars province. Based on this study, 95 percent of the total annual water consumption in Fars is used for agriculture, whereas the percentages for domestic and industrial uses are 4 and 1 percent, respectively. Population growth, urban and industrial growth, and agricultural development in Fars have created a condition of water stress. ...

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