ASSESSING RISK OF GROUNDWATER POLLUTION FROM LAND-DISPOSED WASTES

1994-11-01
A stochastic modeling approach for the migration of contaminants in soil and ground-water is developed to assess the expected magnitude of contamination at receptors located downgradient from a waste pit. The model evaluates uncertainties in contaminant concentrations due to uncertainties in waste composition and hydrogeologic properties of waste sites, and determines the exceedance probabilities of a specified concentration level at receptor points using Monte Carlo (MC), first order (FO), and point-estimate (PE) methods. A lognormal distribution is assumed for concentration at a receptor point in application of the FO and PE methods to assess exceedance probabilities. A comparison of the three error-analysis methods is performed to evaluate the efficiency and accuracy of the FO and PE methods relative to the MC method. Results suggest that for nonadsorbing and conservative contaminants, the level of accuracy provided by the FO method is comparable with that of the MC method. For nonconservative contaminants, both FO and PE methods compared less favorably with the MC results.
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE

Suggestions

EVALUATION OF SOIL MOISTURE CONTENT FROM ASTER AND WORLDVIEW 2 IMAGERIES
Soydan, Hilal; Düzgün, Hafize Şebnem (2014-07-18)
The traditional approach of soil mapping is time consuming and requires large amount of investments, especially for large scale areas, whereas the reflectance spectrometry for assessing the spectral behavior of soil has been an alternative [13]. This study aims to predict the moisture level in soil and significant wavelengths pointing the moisture existence with the help of satellite imageries and spectroscopic data. For that purpose. spectral profiles obtained from Advanced Spaceborn Thermal Emission and R...
Prediction of geotechnical properties of cohesive soils from in-situ test : an evaluation of a local database
Yaman, Gökhan; Erol, Orhan; Department of Civil Engineering (2007)
In any geotechnical design procedure, the fundemantal point to be initially clearified is the characterization of existing soil profile at a site. This requires a great deal of planning a suitable site investigation program including borings, sampling, laboratory and in situ testing etc. Laboratory and in-situ (field) tests are important tools leading to the estimation of soils properties in geotechnics. Beside laboratory tests, the measurement of engineering properties in situ is a continuously growing and...
Assessment of soil acidification due to a natural gas-fired power plant by using two different approaches
Soyupak, S; Yurteri, C; Mukhallalati, L; Kilic, B; Kayin, S; Onder, K (Informa UK Limited, 1996-01-01)
Potential soil acidification impacts of a proposed natural gas-fired combined cycle power plant were assessed using an integrated approach coupling an atmospheric deposition model with soil acidification quantification. The deposition model was used to estimate the rates of nitrogen oxide (NOx) deposition on the air-soil boundary. The expected changes in the soil column were then predicted by utilizing mechanistic and experimental methods, and the number of years required to reach critical pH values were pr...
A COMPARATIVE-EVALUATION OF DIFFERENT APPROACHES FOR ASSESSING SOIL ACIDIFICATION IMPACTS
SOYUPAK, S; KILIC, B; MUKHALLALATI, L; YURTERI, C (Informa UK Limited, 1993-01-01)
Long-term impacts of acidic depositions on soils can be predicted with coupled applications of acid deposition models and approaches to assess soil acidification. Soil acidification assessment can be achieved by using the following approaches: (i) Mechanistic modelling (ii) Experimental acid buffering capacity (ABC) method (iii) Qualitative evaluations The mechanistic modelling approach adopted in this study utilises predicted acid deposition rates and soil properties as well as dominant soil mechanisms inc...
Development of helical tubular reactor for hydrogen producing photosynthetic bacteria
Sarı, Süleyman; Eroğlu, İnci; Department of Biotechnology (2007)
Photobiological hydrogen production from organic materials occurs with the help of illumination and under aerobic conditions within photobioreactors. Novel designs are needed in order to increase the light conversion efficiency and to improve the biological hydrogen production. In this thesis, purple non sulfur bacteria Rhodobacter sphaeroides O.U. 001 was employed as the hydrogen producing microorganism. Two different types of photobioreactors, namely oscillatory helical photobioreactor and recycling helic...
Citation Formats
K. Ünlü, “ASSESSING RISK OF GROUNDWATER POLLUTION FROM LAND-DISPOSED WASTES,” JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE, pp. 1578–1597, 1994, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55889.