Health Assessment of Urban River in Extremely Cold Area - A Case Study in Nachuan River
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Abstract:
River health assessment plays an important role in guiding the control and protection of river environment. In this paper, fuzzy hierarchy analysis was used to determine the weight of each index in the river health system, and variable fuzzy set theory was introduced to establish an integrated model of fuzzy analytical hierarchy process and variable fuzzy set (FAHP-VFS). The model was applied in the Nanchuan River. Twenty quantitative and qualitative indexes were selected to develop the river health evaluation system, and river health was evaluated from three aspects including geomorphology, ecology, and hydrology. The results showed that the overall Nanchuan River is in a healthy state, but some segments are in a sub-healthy state, which suggested that the Nanchuan River needs sectionalized regulations.
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