According to the level of vegetation abundance relationship model,It is planned to build an assessment index system on the base of the vegetation variable volume and price risk .
According to the water level of vegetation abundance relationship to water depth model ,It is planned to build an assessment index system on the base of the vegetation variable volume and price risk .
According to the relational model of the vegetation of the abundant water levels, quantitative risk evaluation index system of vegetation which uses the depth of water(DTW) as the variation will be built up.
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