Research On Water Ecology Evaluation Of The Representative Rivers In Shandong Province

The change of river ecology is related to the steady development of social economy,and it is the key of the water ecology construction.The comprehensive evaluation of river ecology environment has important guiding significance to the construction of river ecology civilization.Combining with several typical rivers in Shandong province,this paper constructed a river ecology environment evaluation system containing water quantity,water quality and benthic macroinvertebrates.making a comprehensive evaluation of river ecological environment from 2004 to 2013.In the process of water quantity research,it focused on the evaluation of ecological flow satisfaction.On the basis of Tennant,combining with the seasonal characteristics of rivers in Shandong province,the method was improved to be more suitable for river in Shandong province.In the analysis process of water quality,using the orderly clustering analysis,Kendall rank correlation test and variance spectral density diagram method,this paper analyzed the jumping,trend and cycle component of water quality sequence,which was of great significance to The change rule and cause analysis of water quality.In the analysis process of benthic macroinvertebrates.a habitat suitability index was proposed including water depth,flow velocity,sediment and water quality.Finally,a fuzzy comprehensive evaluation model was used for the comprehensive evaluation of river ecological environment.According to the results of evaluation,this paper put forward some relevant guarantee measures to improve and promote river ecological environment of Shandong province.