Regional Differences Of Land Use Change In Chongqing City

In last century, with population's growth and progress of technology, the range that the mankind use land is expanding constantly and the intensity is being aggravated constantly. These have caused a large number of global environment questions. Land use and land cover change is one of the most important components and major causes to global environmental changes. It has important function on guaranteeing sustainable development of regional economy and on protecting safety of human living environment to reinforce change researches of land use, and study on land use change is also the frontier.Chongqing City became a municipality directly under the central government since 1997, economic development, population's increase, increasing of water and soil resources demand and increasing of the living environment pressure which make depth, scope, speed of land use demonstrate sharply increasing trend compared with before. The same time, Chongqing City is the largest municipality in China with an area of 82,400 km~2, the speed, degree and direction of Land use demonstrate remarkable distinction became the states of land resource, size of population, economic development levels etc are quite different in various zones. Therefore, it is very meaningful to study the distinction of land use change and driving forces in different economic regions of Chongqing in order to resolve the contradiction between regional lands and people rationally and promote regional sustainable economic development.Base on the foundation of analysis of the acquisition about the LUCC study in international and our country in this text, according to the data of land use and socioeconomic statistics in 1997-2005, this paper takes many kinds of qualitative and quantitative approaches as methods to analyze the land use change in these regions whose development degrees are different: urban developed economical circle, the west economical corridor, three gorges storehouse district ecology economic region(urban region, the west region, three gorges region). From the analysis different land use actualities and according to the model of land use dynamic change, the paper, from different sides, analyses the dynamic laws of changes of structure, speed and degree in different regions. Base on the foundation of qualitative analysis of land use driving force ,the paper use the judge law of fuzzily synthetically to quantitative analyze land use driving force in different regions in Chongqing.The whole dissertation is divided into five parts:The first part is an overall introduction, which consists of the background and significance of thesis selection, current state of land use change around the world, and the research thinking and method of the thesis.The second part introduces natural, economic condition and land use actualities in Chongqing and in three economic regions, and compares land use actualities in three regions.The third part analyzes land use change and regional differences of land use change in three economic regions from structure, speed and degree of land use, and analyzes land use change from function localization of every region.The fourth part: the paper, qualitative explains of land use driving mechanism, then uses the judge law of fuzzily synthetically, selects 12 appraisal targets that mainly is the social economy targets quantitative to analyze land use driving force in different regions in Chongqing , then points out major driving force type in every region.The conclusion and the discussion are presented in the fifth part. The main conclusions go as follow:1. Land use actualities: Proportion of agricultural land is all highest in three economic regions, and land use all displays big-agriculture land pattern. The agricultural land is main cultivated land, forest land, and other agricultural land. Besides, proportion of build-up land is higher in urban region and in the west region, and proportion of uncultivated field is higher in three gorges region.2. Land use changes in different regions in 1997-2005:Urban region: the change of land use construction is most intense, the speed of land use change is fastest, the land use degree enhances largely. The concrete changes: build-up land increases, in which residential area and the industry land increase primarily; agricultural land decreases, in which cultivated land and other agricultural land decrease, garden land and forest land increase; uncultivated field decreases, in which uncultivated land decreases primarily. The land combination type increase residential area and the industry land except cultivated land, forest land and other agricultural land, the land use construction is diverse; in land use types, cultivated land, forest land and residential area and the industry land, whose structural changes are bigger, and garden land, transportation land and residential area and the industry land, whose speeds of changes are faster.The west region: the change of land use construction is more intense, the speed of land use change is faster, the land use degree enhances. The concrete changes: build-up land increases, in which residential area and the industry land increase primarily; agricultural land decreases, in which cultivated land and other agricultural land decrease, garden land and forest land increase; uncultivated field decreases, in which uncultivated land decreases primarily. The land combination type is cultivated land - forest land - other agricultural land; The land use multiple and uniformity index increase, and the dominance index drops, the land use is more balanced; in land use types, cultivated land, forest land and garden land, whose structural changes are bigger, and garden land, transportation land and forest land, whose speeds of changes are faster.Three gorges region: the change of land use construction is gentle, the speed of land use change is slow, and the land use degree enhances a little. The concrete changes: build-up land increases, in which water conservancy facilities land increases primarily; agricultural land increases, in which cultivated land and other agricultural land decrease, garden land and forest land increase; uncultivated field decreases, in which uncultivated land decreases primarily. The land combination type is forest land -cultivated land; the land use dominance index increases, the land use is more centralized; in land use types, forest land and cultivated land, whose structural changes are bigger, and water conservancy facilities land, garden land and transportation land forest land, whose speeds of changes is faster.Analyzed from different function localizations of different regions, the trend of land use change of three regions basic suits to their function localization, but in the process of land use change, causes that the contradictory aggravate among the build-up land use, the ecology land use, agricultural structure adjustment and cultivated land protection.3. The paper uses the judge law of fuzzily synthetically, quantitative to analyze land use driving force in different regions: the main driving force is Most superior economical welfare and Ecological security welfare in urban region, the main driving force is Food security and Survival economical welfare in the west region, and the main driving force is Ecological security welfare and Survival economical welfare in three gorges region.4. The paper is based on the data of land use, from different sides compares and analyzes land use change in different economic regions by land use models, and points out main driving force of land use change in every region. The result indicated that: the land use change displays the remarkable difference and the main driving influence of land use change also obvious different in these regions whose economical levels are different.