نتایج جستجو برای: sais confined aquifer

تعداد نتایج: 48611  

2000
P. Allen Macfarlane

The nomenclature for Kansas aquifers needs revision. Many of the names currently in use were derived in an ad hoc manner without the benefit of a consistent set of hydrogeologically based guidelines. Because nomenclature forms the basis of scientific discussion of hydrologic issues, names should be clearly defined and consistently applied in order to prevent erroneous or unintended hydrologic i...

Journal: :IOP conference series 2023

Abstract Resistivity data acquisition using the two-dimensional (2D) resistivity method has been carried out at 8 locations in Kahayan Kuala area, Pulang Pisau District, Central Kalimantan. The aim of study was to identify distribution type and depth aquifer layers other geological materials subsurface based on their characteristics. results showed that values northern part area ranging from 13...

Journal: :Geophysical Research Letters 2021

A gas blowout during an unauthorized well drilling occurred on June 9, 2020 at the Rome-Ciampino boundary periphery of Colli Albani quiescent volcano. This zone hosts a shallow confined gas-pressured aquifer, which recently produced further three blowouts. Dangerous atmospheric CO2 and H2S concentrations killed some birds, 12 families were evacuated. The helium isotopic composition indicates th...

Journal: :Mathematical Geosciences 2022

Abstract The use of spreadsheets for numerical groundwater flow modeling is not a novelty; however, its potential in the classroom has been emphasized enough. This Teachers Aid provides step-by-step implementation steady-state, vertically integrated two-dimensional model confined irregular aquifer with boundary conditions three kinds and subject to pumping recharge that will enhance learning ex...

Journal: :Hydrology Research 2023

Abstract The DRASTIC method is one of the most widely used groundwater vulnerability assessment techniques. In areas where main useful aquifers are covered with an extra layer diverse sediments, a further modification required for more precise estimation. this article, was improved in characterized by Quaternary deposits remarkably influencing infiltration conditions. Three parameters were modi...

Journal: :Groundwater for Sustainable Development 2021

Geoelectrical resistivity sounding surveys was carried out at two locations (A and B) in the new CanaanCity residential estate of Canaan land Ota, Ogun state order to locate possible targets for groundwater explorations. A total twelve (12) vertical electrical soundings were conducted using Schlumberger array configuration. The interpretations VES curves revealed five six geoelectrical layers l...

2003
Giuditta Lecca Pierluigi Cau

The study site covers an area of 273 km in the Oristano plain on the western coast of central Sardinia (Italy). In the coastal area, since 1950, intensive agriculture and subsequent urbanization have resulted in overexploitation of the aquifer system and significant deterioration of groundwater quality due to seawater encroachment. The groundwater basin, hosted in the Quaternary alluvia release...

2000
Jiu Jimmy Jiao

Landslides associated with hillside cuttings in igneous rock saprolites are a serious natural hazard in Hong Kong and have been extensively studied by government agencies and local universities for many years from the perspective of soil and rock engineering. A review of the case studies for some major landslides, especially deep-seated landslides, shows certain puzzling features. First, a numb...

1998
P Allen Macfarlane

In his reports on the regional hydrogeology of the central Great Plains, in particular southeastern Colorado and southwestern and central Kansas, Darton considered the Dakota aquifer to be a classic example of an artesian system. Computer simulations of the flow system in this study, however, suggest that the Dakota is not a regional artesian aquifer in the classic sense. Sensitivity analysis o...

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