جستجوی مقالات مرتبط با کلیدواژه "تاپسیس" در نشریات گروه "زیست شناسی"

Salt phytoremediation, which means reducing salinity of soil or water using halophytic plants, has been the subject of several studies in recent years. Despite numerous investigations in this area, the problem with the use of halophytic plants for salt phytoremediation is the selection of suitable plants from their large population or, in other words, screening of halophytic plants for salt phytoremediation. In this paper, by limiting the screening work to 12 annual plant species of the Chenopodiaceae family, the Shannon Entropy -TOPSIS Multi-Criteria Decision Making Method has been used for this purpose. Evaluation was done on the basis of criteria such as biomass production, salinity mechanism, flowering time, geographical distribution in Iran and agronomic capability. The Shannon entropy method was used to rank and weight the criteria and the TOPSIS method was used to determine the relative preference of the studied species. The results indicated that Atriplex Tatarica, Bassia Moricata and Salsola Kali were the top three among the 12 plant species studied. Therefore, their use in experimental phytoremediation of salt plants seems to be a priority.

Today, site selection is an important and necessary issue for construction and demolition wastes management in population fast-growing regions. Therefore, the main purpose of this research that was sponsored by Karaj municipality is landfill site selection for CDW in Karaj city with geographic information system (GIS) and multi-criteria evaluation (MCE) method. At first, by studying literature review, the criteria and sub-criteria necessary for site selection were identified. Four criteria and sixteen sub-criteria were selected by Delphi method. Weighting of criteria and sub-criteria was done by AHP method and expert choice software. All of the sub-criteria were mapped, standardized and overlaid in Arc GIS and IDRISI software environment by weighted linear combination (WLC) method. Finally, four alternatives (A1-A4) with a total area of 9700 hectares (4.7% of the total area of Karaj) have the the highest suitability, for CDW landfill in Karaj. These alternatives were ranked with TOPSIS method as A2>A4>A3>A4.