26OA
HYDROGEOLOGYPHYSICO-CHEMICAL
This report presents some preliminary results from a large field experiment that is evaluating the mobility, persistence and fate in groundwater of compounds present in coal tar creosote. Analysis of groundwater samples collected 278 days after the emplacement of the creosote shows that with increasing distance from the source the concentration of naphthalene is reduced while that of quinoline increases, eventually becoming dominant. A similar trend was also observed for samples collected after 471 days and this can be related to the relative aqueous solubilities and mobility of the two compounds. Also observed in the outermost 471 day samples was the presence of quinolinone which is believed to be an aerobic metabolite of quinoline. (from Authors) 956071 Water movement and isoproturon behaviour in a drained beavy clay soil: 1. Preferential flow processes A. H. Haria, A. C. Johnson, J. P. Be.11& C. H. Batchelor, Journal of Hydrology, 163(3-4), 1994, pp 203-216. The processes and mechanisms that control pesticide transport from drained heavy clay catchments are being studied at Wytham Farm in southern England. Soil studies demonstrate that the main mechanism for pesticide translocation is by preferential flow processes, both over the soil surface and through the soil profile via a macropore system that effectively by-passed the soil matrix. (from Authors) 956972 Water movement and isoproturon bebaviour in a drained beavy clay soil: 2. Persistence and transport A. C. Johnson, A. H. Haria, C. L. Bhardwaj, C. Volkner, C. H. Batchelor & A. Walker, Journal of Hydrology, 163(3-4), 1994, pp 217-231. In a study of isoproturon applied to winter wheat in a heavy clay soil, high concentrations of herbicide were detected in overland flow (surface runoff) water, mole drain water and field drain water. Comparison of isoproturon with chloride and sulphate concentrations suggests different origins for the drain water, with the majority of isoproturon being carried down to the drainage system by preferential flow from the soil surface. A residue of S-IO% of the herbicide persisted in the top soil. (from Authors) 956973 Uranium infiltration from a river to sbaIlow groundwater C. Lienert, S. A. Short & H. R. Von Gunten, Geochimica et Cosmochimica Acta, 58(24), 1994, pp 5455-5463. The infiltration of uranium from the polluted River Glatt (Switzerland) into a hydraulically connected saturated aquifer was investigated during a period of almost live years. The uranium concentrations and the u4U/238U activity ratios (ARs) were analysed monthly in the water of the river and of four groundwater sampling wells. The uranium concentration and the ARs in the river varied seasonally with a maximum and a minimum, respectively, in summer. The concentration maximum of uranium was also detected in the shallow groundwater, but with a delay of about six months to the maximum in the river. An ongoing general decrease of the uranium concentrations and a disappearance of its summerly maxima in the River Glatt were observed. The results of this case study can be applied to estimate the migration behavior of other actinide oxy-ions in shallow heterogeneous aquifers, which abound in alpine and pie-alpine locations. (from Authors) 956974 Accelerated pbysicaI modeUing of radioactive waste migration in soiI T. F. Zimmie, M. B. Mahmud & A. De, Canadian Geotechnical Journal, 31(S), 1994, pp 683-691.
CHANGES
A lOOg-tonne geotechnical centrifuge was used to study the long-term migration of a contaminant and radioactive tracer through a saturated soil medium. The use of the centrifuge simulates the acceleration of traveltime in the prototype, which is N times larger than the model, by N2, where N is the desired g level. For a 5 h run at 6Og, the test modelled a migration time of about 2 years for a prototype 60 times larger than the small-scale model tested. Iodine 131 (I-131), used as the tracer, was injected onto the surface of the soil, and was allowed to migrate with a constant head of water through the saturated soil. The results obtained are in good agreement with the test performed on the same model setup using potassium permanganate as a tracer and with numerical flow net modelling. (from Authors) 956075 Chemical characterization of heavy-metal contaminated soil in soutbeast Kansas I. Abdel-Saheb, A. P. Schwab, M. K. Banks & B. A. Hetrick, Water, Air, L Soil Pollution, 78(1-2), 1994, pp 7382. A t&state mining region, including parts of Missouri, Oklahoma, and Kansas, was the site of intense lead and zinc mining and smelting activity until the 1950’s. A study was initiated to characterize the heavy-metal contamination of soils in this area. Water-soluble, an index of plant-available, total, and sequentially extractable metals; organic, and total carbon; and saturated paste pH were determined for mine tailings and soil samples. (from Authors) 956076 Contaminated land: from &ability assets. Procccdhgs of a symposium, Birmingham, UK, February 1994 ANON (IWEM), (Institution of Water & Environmental Management), 1994, unknown. This volume contains 18 papers presented at a two day symposium held by the Institution of Water and Environmental Management. The papers are divided into two sections: regulation and remedial treatment. Contaminated land policy and planning regulations are discussed. Current methods for contaminated land treatment technology are examined. Legal aspects of the problem are assessed. (S.E.Brown) 956077 Injection of industrialwastewater in Israel: siting criteria for deep injection weUs and associated problems R. Nativ, I. Hemo & G. Weinberger, Journal of Hydrology, 163(3-4), 1994, pp 299-323. Subsurface injection has become the predominant method of disposing of liquid hazardous waste in the US. Approximately 10 billion gallons, or 60% of all hazardous waste disposed, are injected annually into wells for subsurface burial. This is twice the amount going to surface impoundments. The desired features of a subsurface reservoir for wastewater injection are defined and a screening procedure for potential reservoirs is presented in this paper. Typical problems associated with data from deep oil- and gas-test wells are discussed, and guidelines for screening data of rock permeability and formation-water pressure, salinity and temperature are presented. These problems, as well as solution approaches, are illustrated for two different reservoirs, selected as potentially suitable for deep-well wastewater injection in west-central and northern Israel. (Authors) 956078 Transient water table rise with canaI seepage and recharge S. Ram, C. S. Jaiswal & H. S. Chauhan, Journal of Hydrology, 163(3-4), 1994, pp 197-202. In arid and semi-arid regions, the lining of all irrigation channels is not economically feasible. Heavy seepage occurs