The Research And Implementation Of Assistant Decision-making Model In Forest Fireproofing GIS

Forest-fire is a kind of extremely complex natural phenomena, it is influenced by various natural and social factors such as combustibles, landform, climate and so on, moreover, the occurrence of the fire is paroxysmal, as a decision-maker, it is vital to judge the trend of the fire and to adopt corresponding actions, at the same time, to control the local situation. So, the decision-maker must master advanced technology to improve his ability of judgment and local superintendence. With the development of computer science, people put much more emphasis on the visual research of forest-fire spread which provides new investigation method in forest-fire, it has the characteristic of visualize, dynamic and intuitionistic. The quantitative simulation of forest-fire actions has very great meaning for forest department to make decisions in forest-fireproofing and fire-fighting. Due to the space-time characteristic of forest-fire actions, decision-maker should simulate the fire-spread based upon the spatial background database, namely, the work should be supported by GIS technology, etc. The complicated forest-fire phenomena and the administration of forest can be faster and much more exact by introducing advanced GIS technology.While establishing the forest decision-making plans, GIS can build forecasting and decision-making model expediently based on spatial and attribute datum, recurring to database and data administration capabilities of its own. GIS can choose best decision-making plan via simulation, comparison and evaluation of kinds of processes, and finally form compositive or theme report outputs for decision-maker to consult. By using the tool of GIS, the relative information can be handled and the results can be represented directly.This thesis aims to provide assistant methods and technologies for decision-making in forest-fireproofing and fire-fighting based upon the research of forest-fire occurrence and development rules. I chose the forest-spread model that fits the situation of our country, taking the influences of spatial factors such as grade and direction into account fully, to implement the simulation of fire-spread trends supported by GIS and build assistant fireproofing decision-making model based on the forest-fire spread forecasting model, in order to provide decision-making reference and support in fireproofing and fire-fighting.The followings are the main contents in this thesis:1. firedarea model forecastApplying the scientific forest-spread model to forecast the situation of fire spread in future and simulating the fire tends according to the temperature, wind power, landform,vegetation types, etc.2. attempering of fire-fighting material around the fire areaImplementing the intelligent computing for advanced rout of fire-fighting group and providing best rout for the materials and crews to get to the fire area, providing best fire fighting plans to decision-maker with both graphs and texts by contraposing the situation of the fire spread forecasted and considering the distribution of fire fighting materials and crews.3. fire area losses estimationCounting kinds of losses of forest promptly resources and providing data that will be likely to lose in future by spatial analysis function in GIS, based upon the situation of the fire spread forecasted or reported locally.The breakthrough in this thesis lies in the combination of special fire spread model and GIS technology to gain firedarea model in specific time or future time, which is the basis of the research and application in attempering of fire-fighting material and loss estimation around fire area, finally, to implement the design and application of the whole assistant decision-making model for forest-fire and computer simulation and forecast of fire spread in complex condition, and to provide spatial analysis around fire area circumstance, computing the best rational location for establishing fireproofing storehouse and scientific attempering of materials such as crews, water source, storehouse and so on for fire fighting needs, querying relative resource information in definite range, optimizing by GIS with the combination of landform and water system factors, providing best rout analysis, representing the results directly to users, prompting the scientific and application characteristic of fire-proofing superintend, providing reference plan and best decision-making for decision-maker.The thesis describes how to utilize Arcobjects during design and development, the assistant decision-making model which is based on forest-fire spread is implemented with COM mode and finally is applied in forest fireproofing information system. This article relying on the oriented object technology is based upon the development of COM that supports interface, the Arcobjects is the tool and its aim is to implement the assistant decision-making for forest fireproofing. This thesis has actual sense for the task of assistant decision-making of fire spread based upon GIS, the technology has been practiced in the province forest-fireproofing GIS, and proved to be reliable and sufficient.