Dersleri yüzünden oldukça stresli bir ruh haline sikiş hikayeleri bürünüp özel matematik dersinden önce rahatlayabilmek için amatör pornolar kendisini yatak odasına kapatan genç adam telefonundan porno resimleri açtığı porno filmini keyifle seyir ederek yatağını mobil porno okşar ruh dinlendirici olduğunu iddia ettikleri özel sex resim bir masaj salonunda çalışan genç masör hem sağlık hem de huzur sikiş için gelip masaj yaptıracak olan kadını gördüğünde porn nutku tutulur tüm gün boyu seksi lezbiyenleri sikiş dikizleyerek onları en savunmasız anlarında fotoğraflayan azılı erkek lavaboya geçerek fotoğraflara bakıp koca yarağını keyifle okşamaya başlar


Chemical And Biological Process Of Groundwater Near Screen Section Of Wells /clogging Process | 2469
ISSN: 2157-7617

Journal of Earth Science & Climatic Change
Open Access

Our Group organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations
700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)
Google Scholar citation report
Citations : 5125

Journal of Earth Science & Climatic Change received 5125 citations as per Google Scholar report

Journal of Earth Science & Climatic Change peer review process verified at publons
Indexed In
  • CAS Source Index (CASSI)
  • Index Copernicus
  • Google Scholar
  • Sherpa Romeo
  • Online Access to Research in the Environment (OARE)
  • Open J Gate
  • Genamics JournalSeek
  • JournalTOCs
  • Ulrich's Periodicals Directory
  • Access to Global Online Research in Agriculture (AGORA)
  • Centre for Agriculture and Biosciences International (CABI)
  • RefSeek
  • Hamdard University
  • OCLC- WorldCat
  • Proquest Summons
  • SWB online catalog
  • Publons
  • Euro Pub
Share This Page

Chemical and biological process of groundwater near screen section of wells /clogging process

International Conference on Earth Science & Climate Change

Abeya Olana Woyessa

Posters: J Earth Sci Climate Change

DOI: 10.4172/2157-7617.S1.006

Groundwater wells are often clogged by incrustation, which has a negative impact on well specific capacity. Chemical and biological incrustation formed by precipitation of minerals in the well reduces the open area of slots in the screen section, which leads to an efficiency reduction in wells. Incrustation conditions are observed in the geothermal energy wells located at Oslo airport, Gardermoen. Well yield capacity has declined since they were installed in 1997. There are eighteen energy wells; 9 wells on the cold side and 9 wells on the warm side. The ground source of heat pump, which is an open system, extracts heat from the ground by pumping ground water from production well to the heat pump. After the circulation in the system, the ground water used is injected into the injection well and flows through the aquifer again. Recently, one well from the cold wells was totally abandoned and it has been replaced by a new pilot well. A quantitative calculation with PHREEQC of saturation indices for formation- and borehole water has aided in the evaluation of several minerals. These results have been compared with formation mineralogy and crust samples from within the borehole. The results from geochemical modelling indicates that carbonate minerals such as calcite (CaCO3), aragonite (CaCO3), dolomite (CaMg(CO3)2), dolomite-ord (CaMg(CO3)2), and rhodochrosite (MnCO3), have the potential to precipitate in the wells. However, the crust analyses showed that only calcium carbonates were found. Furthermore, the elevated percentage of inorganic carbon in the crust samples supports evidence of carbonate mineral precipitation. In addition, the reduction of ferrous iron (Fe++) concentration, as the flow of formation water approaches production wells, as well as the relatively high percentage of iron in the crust samples are all indicative of Fe (III) oxide minerals precipitation. An increased content of organic carbon in the crust samples compared with aquifer material indicates microbiological activity in the formation of the crust. The disturbance of chemical equilibrium due to pumping, which leads to pressure reduction allows the release of gases from the formation water, resulting in precipitation of calcium carbonate in the wells.

Abeya Olana Woyessa has completed his bachelor degree at Mekelle University, northern Ethiopia, since 2006 .He employed in firm called Hard Rock Drilling and Engineering PLC. He was working as site geologist for three years. He got an Opportunity to pursue his study from Oslo University, Norway and earned master degree in environmental geology and geohazards in Jan 2012.