关键词: 土地利用结构, 信息熵, 土地利用系统

Abstract: Land use system is a complicated and macro system with dissipative structure.It has orderly characteristics of function and structure.The order degree of land use system is applied to express information entropy values and the applications in the regulation of the land use struc-ture in a region are discussed in this paper.The information entropy values of land use structure in different periods of time and regions sare calculated,and the laws and causes are analysed.Firstly,the information entropy values of land use structure of Lishui city in Zhejiang Province and the province itself covering the peri-od of1990to1999are calculated.The results show that the information entropy values in1990are the lowest and then rise.They fall after they arrive at the highest values.This indicates that the land use systems go through a course from order to disorder and returning to order.Secondly,the information entropy values of land use structure of the whole country and the East region,the Central region,the West region,Zhejiang Province and the cities of the province,Hangzhou city and the five counties under the jurisdiction of the city are calculated.The information en-tropy values decrease progressively from the coastal area to inland.This indicates that the order of land use system increases progressively from the coastal area to inland.The applications of the information entropy values of the land use structure are discussed in the paper.The information entropy values are of guiding significance to the regulation of the land use structure in a region as they can reflect the dynamic change and transformation degree of land use types in a region in a certain period of time.However,the point is how to set remains to be researched with the optimum information entropy value of the land use structure in differ-ent region s.

Key words: land use structure, information entropy, land use system