泥石流危險度分區的模糊信息模型

Model of Fuzzy Information for Debris Flow Risk Factor Zoning

10.29417/JCSWC.199912_30(4).0004

韋方強(Fan-Qiang Wei)；謝洪(Hong Xie)

泥石流 ； 模糊 ； 信息 ； 危險度分區 ； debris flow ； fuzzy ； information ； risk factor zoning

中華水土保持學報

30卷4期（1999 / 12 / 01）

273 - 277

繁體中文

在要進行泥石流危險度分區的地區選擇一樣區，充分掌握樣區內的泥石流災害信息。根據樣區詳盡的泥石流災害信息，用泥石流危險度分區的直接指標方法確定樣區的泥石流危險度分區。利用信息論中信息量概念，對樣區內影響泥石流活動強度的各因素的各種狀態提供給不同危險度分區的信息量進行計算。由不同的泥石流危險度分區構成評語集合，由統計單元的各因素提供給不同危險度分區的總信息量構成模糊評判集合，根據最大隸屬度原則確定泥石流危險度分區。並將這一模型應用到川渝地區，應用結果表明該模型具有較高的準確性，可以滿足大區域泥石流分區之要求。

A typical area should be chosen as the sample area in a region that will be zoned. The information of debris flows must be gathered completely. The risk factor zones are zoned according to the complete information of debris flows. The relative altitude, stratum, lithologic characters, fault, earthquake, annual variability of precipitation, interannual variability of precipitation and the daily range of temperature are selected as the main factors influencing the activities of debris flows, and the statuses of these factors are divided. The information quantities of all statuses of the main factors to different risk factor zones are calculated as the base on the concept of information quantity in the information theory. Different risk factor zones constitute a remark set. The general information quantities of every factors to different zones constitute a fuzzy evaluation set. Then the risk factor zones are determined with the principle of maximum membership grade according to the remark set and fuzzy evaluation set.