One of the most important methods to investigate heavy metals as pollutants is more likely to use bio-monitors which can be applied as an appropriate index to express the quality of environment. In current study, in order to investigate the effects of dominant plants in the desired region and role of aquatic macrophytes in monitoring such elements as zinc (Zn), lead (Pb), copper (Cu) and cadmiu...

we studied litterfall dynamic of tree plantations in dez river floodplain, at 14 to 15 years old. the plantations consist of populus euphratica oliv., eucalyptus camaldulensis dehnh., e. microtheca f. muell, acacia farnesiana (l.) willd., a. salicina lindl., a. saligna (labill.) h. wendl., a. stenophylla benth. and dalbergia sissoo roxb. litterfall was different between the tree species, and le...

abstract one of the major factors on the amount of water resources is river flow which is so dependent to the hydrologic and meteorologic phenomena. simulation and forecasting of river flow makes the decision maker capable to effectively manage the water resources projects. so, simulation and forecasting models such as artificial neural networks (anns) are commonly used for simulation and predi...

Rivers are discussed as sources of water supply for various uses including agriculture, industry anddrinking. Thus, monitoring the quality of these resources due to the recent drought and urban and ruraldevelopment is one of the important tasks in the field of environmental management. In this study,nine stations sampled seasonally the Karoon river, Dez, Karkheh in a one-year period from Octobe...

In this paper, an improved Ant Colony Optimization (ACO) algorithm is proposed for reservoir operation. Through a collection of cooperative agents called ants, the near-optimum solution to the reservoir operation can be e ectively achieved. To apply the proposed ACO algorithm, the problem is approached by considering a nite horizon with a time series of in ow, classifying the reservoir volume t...

in order to evaluate the phragmites australis, myriophyllum spicatum and potamogeton perfoliatus aquatic plant species as an indicator organism of heavy metals pollution in bio-monitoring studies of the aquatic ecosystems, the aim of this study was to determine the levels of heavy metals accumulation zn, cu, pb and cd in sediments, roots, stems and leaves of these plants in north and south of t...

in order to evaluate the ecological potential for assessing the ecotourism application a region was confined to dez river. mcharg method and networks method were applied. according to makhdoum’s method, to determine environmental units, the ecological resources of the region were surveyed. then evaluation of the ecological potential was carried out on the basis of ecotourism and qualified regio...