نتایج جستجو برای: irregular extraction from groundwater

تعداد نتایج: 5702658  

Journal: :International Journal of Enviornment and Climate Change 2021

Groundwater is the biggest freshwater reservoir in world. More than 95% of unfrozen water comes from groundwater. Factors responsible for groundwater consumption by rice growers have been included study. For study, Purba Barddhaman district was selected purposively considering pattern agriculture and extent use state. One community development block has based on crop diversity, type irrigation,...

2013
Naveen Gupta Amit Sinhal

Nature of Web information is dynamic and irregular that’s why it is difficult to search and integrate information from the Web. The biggest task in making WWW data accessible to users/agents is extracting the data from Web pages. We take advantage of information in existing Web pages to creating structured data semi-automatically. Extraction of information from semi-structured or unstructured d...

Journal: :Journal of environmental management 2016
James A Saunders Bruce E Pivetz Nathan Voorhies Richard T Wilkin

Sandstone-hosted roll-front uranium ore deposits originate when U(VI) dissolved in groundwater is reduced and precipitated as insoluble U(IV) minerals. Groundwater redox geochemistry, aqueous complexation, and solute migration are important in leaching uranium from source rocks and transporting it in low concentrations to a chemical redox interface where it is deposited in an ore zone typically...

2012
J. Huang J. Halpenny W. van der Wal C. Klatt T. S. James A. Rivera

[1] Groundwater is a primary hydrological reservoir of the Great Lakes Water Basin (GLB), which is an important region to both Canada and US in terms of culture, society and economy. Due to insufficient observations, there is a knowledge gap about groundwater storage variation and its interaction with the Great Lakes. The objective of this study is to examine the detectability of the groundwate...

1999
Ross McCartney Peter Ledingham

Deep (>300 m) subsurface hydrochemical data are important components of geological investigations of potential radioactive waste disposal sites. These data can be interpreted to yield information that supports conceptual hydrogeological models, constrains palaeohydrogeological evolution and characterises subsurface hydrochemical conditions of a site. The most important sources of these data are...

Journal: :Environmental Modelling and Software 2014
Wolfgang Schmid R. T. Hanson S. A. Leake Joseph D. Hughes Richard G. Niswonger

The dependency of surfaceor groundwater flows and aquifer hydraulic properties on dewateringinduced layer deformation is not available in the USGS's groundwater model MODFLOW. A new integrated hydrologic model, MODFLOW-OWHM, formulates this dependency by coupling mesh deformation with aquifer transmissivity and storage and by linking land subsidence/uplift with deformationdependent flows that a...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2010
Shigehiro Kagaya Saori Nakada Yoshinori Inoue Waka Kamichatani Hideyuki Yanai Mitsuru Saito Tamotsu Yamamoto Yuzuru Takamura Koji Tohda

Solid phase extraction using a mini cartridge packed with 22 mg of chelate resin immobilizing carboxymethylated pentaethylenehexamine was successfully utilized for separation/preconcentration of cadmium in water samples prior to liquid electrode plasma atomic emission spectrometric (LEP-AES) determination. The combined method with the extraction and LEP-AES was applicable to the determination o...

This paper evaluated an integrated water resources management approach through linked WEAP-MODFLOW model. Study area is Ravasnar-Sanjabi plain located in Kermanshah province in the west of Iran. A MODFLOW model was evaluated and then, accepted as a groundwater model for the region in present research. Schematic WEAP model was provided as representing general features of water resources system a...

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