The invention discloses a mountain torrent disaster
risk assessment model construction method and
system, and an early warning method, device and
system, and the model construction method comprises the following steps: building a corresponding fuzzy judgment matrix based on an
assessment index, and building a corresponding objective function based on the fuzzy judgment matrix; taking the objective function as a
fitness function of a grey wolf optimization
algorithm, using Poisson disk sampling to initialize a wolf pack position to obtain the wolf pack position, performing iterative updating on the wolf pack position based on the
fitness function, and determining each evaluation weight based on a final iterative updating result; and based on a fuzzy comprehensive evaluation method, constructing a corresponding
risk evaluation model by using the obtained evaluation weight, and determining a
risk level corresponding to the mountain torrent disaster by the
risk evaluation model based on the corresponding risk
monitoring data. According to the method, the
risk assessment model for mountain torrent disasters is constructed based on the fuzzy comprehensive analysis
algorithm, various factors generating mountain torrents can be comprehensively analyzed, the early warning result is matched with the specific condition of a mountain area, and the
false alarm rate is reduced.