Author(s): Huidong Su, Tiantian Jin, Shi Feng, Junqiang Lin

Linked Author(s): Tiantian Jin

Keywords: IIWE method, river health assessment, weight, assignment, critical threshold

Abstract:

The current river health assessment is mainly done by multi-index evaluation method, and the decisive factors are index, weight and index assignment. Due to the variation of rivers, the construction of index system and assignment of weight and index are ambiguous, complex and subjective. Based on these facts, this paper puts forward a new method of river health assessment based on the summary of previous studies which is the IWE method. In the IWE method, the weights of different rivers are relatively fixed and widely applicable, but the threshold values which determine the index assignment are variable and changeable with different rivers. The steps of river health assessment by IWE method are as follows: firstly, construct a Widely applicable index system; secondly, assign the weight of each index to be a fixed value which is appropriate for all kinds of rivers; thirdly, show the index quantification method and threshold index assignment principle variable to adapt to different rivers, namely the index key threshold variable to reflect the different types of rivers and lastly,assess the river health by comprehensive health index of each index and the weight assignment. Here, it should be noted that the river health assessment should focus on the valuation of different indicators, and carry out river ecological restoration plus management accordingly. (2635, 72, 274)

DOI:

Year: 2017