| Study on decision support system of returning cultivated land toforestry(grass) in the background of the west exploitation?ang Yong binThe article discusses the present utilization state of the west of china抯 land resources, ecological environment and cultivated land, expounds the necessity and feasibility of returning farniing land to forestry (grass) to restore ecological environment in the background of the west exploitation. Then it analyzes the necessity of establishing the decision support system of returning farming land to forestry抯 in the support of GIS and decision support system. The article puts forward the principle and technical line of land抯 returning decision making system. The article select Yuele, Fluachi,Gansu for the object of empirical research, which is acted as supporting the theory. The whole text is divided into six chapters.Chapter One. Introduction. Mostly discusses the austerity of ecological environment1s deteriortation situation and its restriction to the west development in the background of the west exploitation. It illuminates that restoring ecological environment is acertain selection the west faced with in the new period and that returning farming land to forestry (grass) is an effective measure to reach it. Returning farming land to forestry or grass and restoring the west抯 ecological environment need a course, need system planning and scientific and reasonable layout. Therefore it is necessary to establish a feasible decision support system in the basis of GIS.Chapter Two. The necessity and meaning of returning farming land to forestry (grass) . The purposes of returning farming land to forestry (grass) is to restore the ecological environment and improve the condition of the west development in order to realize the ~ sustainable development. The west resource background and the problem of ecology and cultivated land are the reality condition of returning land. The theory of fitness, the realation of human and land, the ecological system and sustainable development is the theoretical base of returning land. The two regjofl~5 successful experience of returning land demonstrates the feasibility of it.Chapter Three. The principle, standard and mechanism of returning land for farming to forestry (grass). Expounds the principle53of returning land which regards looking a regions s returning land as a system work and plans. At the same time it reviewed the standard of returning land for farming to forestry (grass). The hillside cultivated above 25b Rust withdra~v plough which is undoubted. But 25b isn抰 the only determining condition of withdrawn plough. Every quarter should have difference according to practical natural economic condition. withdrawn plough should adjoin to other correlated gruaranteed measure by way of the means of restoring ecology.Chapter Four. The decision making system design of the returning farming land to forestry抯 in the west exploitation. Mostly introduce GIS抯 generation and development, the supporting techflo~ogy~~ decision support system (decision, decision support, decision support system etc). Finally it lays stress on the introduction of the structure of decision support system including database, knowledge base, model library, method library and man?machine interactive system etc.Chapter Five. The establishment of returning farming land to forestry (g~ass)~s . The chapter discusses the principle and system architecture of establishing returning farming land to forestry (grass). And expounds the construction and establishment of each functional module in the system and the system抯 actual function.Chapter six. The empirical research of decision making system of the hillside cultivated returning farming land to forestry抯 in Yuele, Huachi. The chapter selects bess rolling country抯 typical town as the practical application of decision support system. It proceeds decision making package with gradient, erosiveness and three other natural factors which effect land use primarily. It divides the wh... |
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