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Showing 2 results for Hamedan.
Evaluation of Sensitivity of Some Existing Evapotranspiration Models to Climate Change Signals in Cold Semi-arid Climate of Hamedan
Z Maryanji, A Sabziparvar, F Tafazoli, H Zare Abianeh, H Banzhad, M Ghafouri, M Mousavi,
Volume 12, Issue 46 (1-2009)
Abstract
Under different climatic conditions of Iran, the evaluation of evapotranspiration (ETo) models sensitivity to meteorological parameters, prior to introducing the superior performance model, seems quite necessary. Using a 35-year (1971-2005) climatological observations in Hamedan, this study compares the sensitivity of different commonly used evapotranspiration models to different meteorological parameters within the IPCC recommended variability range of 10 to 20% during the growing season (April-October). The radiation and temperature-based ETo models include: Penman-Monteith -FAO56 [PMF56], Jensen-Haise [JH1,2], Humid Turc [TH], Arid (semi) arid Turc [TA], Makkink [MK], Hansen [HN], and Hargreaves-Samani [HS]. Results indicate that all the above-mentioned ETo models show the highest sensitivity to radiation and temperature parameters. This implies that special care is required when we apply model-generated radiation and albedo parameters in such ETo models. It is predicted that by 2050, as a result of global warming, the cold semi-arid climates of Iran will cause an average evapotranspiration rise of about 8.5% in crop reference during the growing season.
Investigating the Impact of Hamedan Landfill on Groundwater and Soil
K. Kakaei, A. Riyahi Bakhtiari,
Volume 22, Issue 1 (6-2018)
Abstract
Landfill sites are one of the most important sources of contaminant entry to the environment. In this research, the concentrations of Cu, Pb, Ni, Cd, and organic compound BPA in Hamadan landfill were evaluated to determine the status of its burial environment in 2014. Seven water samples (2 samples from spring and 5 samples from well), 2 leachate samples and 15 soil samples were collected from Hamadan landfill. Evaluation of the concentrations of Cu, Pb, Ni, Cd and the organic compound BPA was done by atomic absorption and gas chromatography with mass spectrometry. The concentrations of metals (Cu, Pb, Ni and Cd) in water samples (wells and springs) Pb <Cu <Cd <Ni, the leachate samples Cu <Pb <Ni <Cd and finally, the soil samples Cd <Cu <Pb <Ni, were obtained, respectively. Water samples (wells and springs), only in a 7W handheld water well sample (the nearest to the buried well) related to BPA 22.35 (μg /l) composition, waste leachate samples for the concentrations of BPA, 103.3 (μg /l), and soil samples for the combined concentration of BPA 5.52 (ng /g) were obtained. High concentrations of Ni, Pd and Cd and high concentrations of BPA in the samples of leachate composition, soil samples of landfill, and the 7W handheld water well samples were due to the high volume of electronic waste and plastic waste.
 

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