| Economy is the core of the research of regional historical geography.The development of economy had a great influence on regional political, cultural,ideological, customs and other aspects in the history. From the point of view of regional historical geography.This paper carefully describes the general developing law of economy of upper reaches of JiaLing River in the history,Besides,it comprehensively analyzes the affect on the region that the distribution of economical factors and geographical phenomena made.This paper consists of two parts,including a preface,and a main body.In preface,it analyzes the theoretical and the value to research on this subject and looks back the history of the studies of parliamentary enclosure and points out the study scope of the thesis. The body part can be divided into three part:â… .Author make a full description of the ecological environment of upper reaches of JiaLing River and analyze some nature and geography conditions,including landform,soil and climate in this region,and some anthropogenic factors like cultural traditions,politics and nationality.From what have been discussed above,it gets a conclusion for this part that the reason that restricted the development of local economy are the rather poor eco-agricultural conditions and geopolitical conditions of the administrative fringe.â…¡.It looks back the course of economical development of upper reaches of JiaLing River in the history,based on which it discusses the development tendency of industry and its structure since Song dynasty.Besides,it mainly analyzes the development and distribution of economy from two angles,both traditional agriculture and trade. At the end,it discusses the formation of market network and the development of small-town by developing water transportation and commodities fair.Obtained military-strategic position of regional economic development under unstable,severe ecological problems, as well as the history of the bad traffic hinder the economic development of the conclusions.Finally,the author is based on the disaster perspective to be evaluated in the ecological environment of the Jialing River.Frost,hail,floods are becoming more frequent today Jialing River in Yangtze River Basin has become the largest sediment concentration,the most serious soil erosion of the river.According to local records,the Ming and Qing Dynasties Jialing River Bailongjiang River,ialing River Lueyang,Ningqiang segment,on many occasions flooded the city event,causing heavy loss of lives and property,and thus the evolution of the ecological environment of the Jialing River and the reasons for this problem should arouse a high degree of attention from academia. |