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Study on Dynamic Evaluation of River Health based on Theme Service

In view of the shortcomings of traditional river health evaluation, such as fixed indexes and poor adaptability, the information technology was applied to the evaluation, and a dynamic evaluation mode of river health based on theme service was proposed. First, determine the evaluation themes which based on river health issues. Second, establish the river health dynamic evaluation process which based on the theme service. Third, construct the evaluation index database and componentize the evaluation method. Finally, draw the knowledge map of the evaluation theme on the synthesis integrated platform and build the river health dynamic evaluation system. A case study was carried out to evaluate the river health in the Xianyang-Xi'an section of the main stream of Weihe River from two themes: river ecological environment quality and river social service function capacity. The results show that the dynamic evaluation of river health based on the theme service can be achieved quickly and from multiple angles, and the results are more credible, which can better meet the needs of decision makers compared with the traditional evaluation methods. The results are of great significance for promoting the construction of river ecological civilization and have practicability and popularization value.