مرکز منطقه ای اطلاع رساني علوم و فناوري - مطالعه موردي طرح ساماندهي آبراهه كارون

چكيده لاتين :

Assessment of the environmental impact in Karoon restoration project has been done after collecting and analyzing data and considering various impacts of the project on the environment according to the methods of network,simple check list, and visual matrix. In this study, the immediate environmental conditions of the region were considered and the quality and quantity parameters were compared and assessed according to national standards. In the absence of standards for some cases, the • rate of variations compared with present conditions and the effect on sensitive factors of environmont, and in some other cases expertsʹ judgements were taken into account. Based on this approach and in the first step, data due to implemental and technical alternative were assessed considering triple purposes of the project (including flood control, water resources planning and navigation), with the interrelation action effect network method,and then various kinds of impact have been evaluated by simple checklist, and finally the significance and importance of impacts were assessed by symbol matrixes. Coefficients for evaluating the impacts were determined based upon their significance and importance, percentage of effects on environmental factors, and the most important effects on sensitive factors of the environment. In order to generalize the triple purposes of project and determine the common factors affected by project the composing matrix is used. In this matrix, common factors have been selected based upon coefficient of evaluating of the activities and the envivnomental impacts. The positive and negative impacts of each distinct activity of the project has been calculated. The results of the above mothods showed that positive impacts of superior technical alternative are more than negative ones. Ln order to reduce negative impacts on the area of the project various policies are recommended such as environmental management methods like performance accuracy, renewing habitats in the river bed, and in the nearby zones via reculturation of the plant cover, protection of laying beds for aqutic creatures, and prevention of establishing dikes in woods. As the last step, some approaches for control and monitoring of environmental quality parameters and also some accurate guidelines to control each environmental factors have been presented. In this manner environmental condition will face the least damage and the final goals of the karoon restoration project will be achieved.