نتایج جستجو برای: including aquifer characteristics

تعداد نتایج: 1567007  

2014
Eric C. Edwards

Institutions formed through local collective action can provide effective solutions to environmental and resource problems. Rigorous quantitative analysis of these issues is often missing, however, and the groundwater economics literature fails to address the role of these types of institutions. This paper explores how the physical properties of the groundwater resource affect the incentives of...

2008
Hailong Li Jiu Jimmy Jiao

Analytical studies are carried out to investigate groundwater head changes in a coastal aquifer system in response to tidal fluctuations. The system consists of an unconfined aquifer, a semi-confined aquifer and a semi-permeable confining unit between them. An exact analytical solution is derived to investigate the influences of both leakage and storage of the semi-permeable layer on the tide-i...

Journal: :محیط شناسی 0
علیرضا زارعی کارشناس ارشد مدیریت مناطق بیابانی دانشگاه منابع طبیعی گرگان ،کارشناس شرکت مهندسی مشاور طوس آب سید مهدی میر سیار کارشناس محیط زیست دانشگاه آزاد اسلامی واحد لاهیجان، کارشناس شرکت مهندسی مشاور طوس آب علی وثوق دانشجوی کارشناسی ارشد مهندسی عمران محیط زیست دانشکده محیط زیست دانشگاه تهران

land use management policy and method are two important factors in usage of land by human. in this regard, evaluation of environmental capability would serve as a valuable basis for the best use practice of soil and water resources in addition to the reduction in environment consequences of the projects. in the correct study, the environmental capability of birjand plain, located in the south k...

2016
LESLIE BROWN

This thesis explores speleogenesis within the Dartry Limestone Formation of Cuilcagh Mountain by considering the hydrogeology of the aquifer in the modern setting but also by considering its evolution since it was deposited during Asbian (Dinantian) times. Due to the synclinal structure of the region, which gently plunges northwestwards, the aquifer remains buried beneath the upland and is not ...

2002
Hailong Li Jiu Jimmy Jiao

This paper presents an analytical solution to describe tidal groundwater level fluctuations in a coastal leaky aquifer system bounded by water–land boundaries that form a right angle (referred to as L-shaped coastlines). The system consists of an unconfined aquifer, a confined aquifer and a leaky layer between them. Previously published analytical solutions that discuss only single aquifer cons...

Journal: :اکو هیدرولوژی 0
شهاب مرادی دیرماندریک دانشجوی کارشناسی ارشد گروه زمین ‏شناسی زیست‏ محیطی، دانشگاه ارومیه حسین پیرخراطی دانشیار گروه زمین ‏شناسی دانشگاه ارومیه فرخ اسدزاده استادیار گروه علوم خاک دانشگاه ارومیه علی آریانفر شرکت مهندسین مشاور ژرف ‏آذران صدر، ارومیه

groundwater is one of the most important resources of water supply for various uses in many regions all over the globe including iran. different contaminants severely affect these resources and might render groundwater unsuitable for consumption. groundwater contamination by nitrate is a well known globally growing problem due to the population growth and increase of demand for food supplies. t...

2001
Carole D. Johnson

A combination of subsurface borehole imaging data and drilling logs were used to characterize the fractures and lithology in 40 bedrock wells at the fractured-rock research site in the Mirror Lake area in Grafton County, New Hampshire. The purpose of the research was to determine whether subsurface lithology and fractures have an effect on the hydraulic conductivity of the crystalline-rock aqui...

2009
B. Malama A. Revil K. L. Kuhlman

We present a semi-analytical solution for the transient streaming potential response of a confined aquifer to pumping at a constant rate through a fully-penetrating line sink. Confined aquifer flow is assumed to occur without fluid leakage from the confining units and is thus described by the solution of Theis (1935). The confining units, which are typically more electrically conductive than th...

2007
Bwalya Malama Kristopher L. Kuhlman Warren Barrash

This study presents a semi-analytical solution for the problem of leakage in an unconfined aquifer bounded below by an aquitard of finite or semi-infinite extent. The homogeneous anisotropic unconfined aquifer of infinite radial extent is pumped continuously at a constant rate from a well of infinitesimal radius. The aquitard is also homogeneous , anisotropic and of infinite radial extent. Flow...

Journal: :Journal of Geographical Systems 2007
D. M. Allen Nadine Schuurman Q. Zhang

Modeling the geologic architecture of an aquifer and visualizing its three-dimensional structure require lithologic data recorded during well drilling. Uncertainties in layer boundaries arise due to questionable quality of drilling records, mixing during the drilling process, which results in blurred contacts, and natural heterogeneity of the geologic materials. An approach for modeling and vis...

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