南川河河流健康评价

河流健康评价研究对河流环境的治理与保护具有重要的指导作用。运用模糊层次评价法确定了河流健康系统中各级指标的权重,然后通过引入可变模糊集理论建立了河流健康评价的模糊层次与可变模糊集(FAHP-VFS)耦合模型。进而以西宁市南川河为例,利用20个定量、定性指标组成的河流健康评价体系,从地貌、生态、水文特征3个方面进行了健康评价。结果表明,南川河总体上处于健康状态,但有部分河段处于亚健康状态,因此应进行分段整治。

Health Assessment of Urban River in Extremely Cold Area - A Case Study in Nachuan River

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.