Research On The System Of Watershed Land Use Function Zoning

The watershed is a relatively complete geographic unit. With the rapid development of society and economy, large-scale development of the watershed land resources has not only exacerbated the shortage of resources, but also threatened the survival and development of human. The ecological environmental issue has become increasingly prominent for unreasonable development and utilization of land resources, which has become a serious constraint for watershed to improve the coordination of social-economic development and residents’ production and living level. The report of the Party’s "18th Meeting" proposes that we have to vigorously promote the construction of ecological civilization, to optimize national spatial development pattern, to comprehensively promote resource conservation, to increase the protection of natural ecosystem and environment and to strengthen the system of ecological civilization construction. Then, it has become an important research field to guide the formation of the watershed in regional land use and to construct a reasonable model of land development and utilization to achieve economic and social benefits, harmony and unity of the ecological benefits and the coordinated development of watershed land space development.The location advantages of watershed in different areas are different. The natural conditions such as the land use, climatic conditions, topography and hydrological conditions, vegetation distribution have some differences, and the social-economic and ecological environment problem are different. The way of all regions of the land use has respective characteristics. The leading functions of land use are different, too. Therefore, it is an important measure to divide function zoning of land use when one builds sustainable land development and utilization mode. To do the research of functional partition system of watershed land use, and to comprehensively sort watershed land-use functional partition theory system and technology provide an effective solution way for scientific and rational watershed land use partition function, and promote the coordinated development of watershed land use and ecological environment.This paper detailedly explores the partition theory system of watershed land use the and methodology based on the needs of the watershed sustainable land use to build watershed land use function zoning system, taking theoretical and empirical research as the main line through the use of the characteristics of watershed land. Watershed land development generates environmental issues. On this basis, combining with the actual situation of Liangzi Lake watershed, the paper puts forward the target, principle and the basis of function zoning of land use in Liangzi Lake watershed respectively. Meanwhile, this paper does a comprehensive analysis of partition method based on decision tree model and the land use function in Liangzi Lake watershed system clustering method of land use and ecological environment assessment based on the comparative analysis to determine the ultimate results of two kinds of partition scheme on the basis of the land use and land use pattern of coordinated development of ecological environment of each functional area of land use regulation measures of Liangzi Lake watershed.The thesis can be divided into eight chapters. The first chapter is the introduction of the study of the background, purpose and significance of the article, the main content of the article research and technology roadmap. The second chapter is the research review, respectively discussing the watershed and related problems of land use zoning. The progress in the functional zoning of land use at home and abroad is reviewed. The third chapter is the theoretical system of the partition function of the use of land, through the analysis of land use zoning of the theoretical basis, objectives, principles and basis for zoning, land use classification function, patterns of land use zoning plan and land use in the watershed so as to form the watershed land use theory system function partition. The fourth chapter focuses on the methods.The author analyzes spatial zoning and land use zoning methods, the land use zoning of the two kinds of specific methods, and studies the related issues of construction of function zoning index system of land use and the method to form system function partition. The fifth chapter is the overview of the study region, introduction of natural conditions and social economic status of Liangzi Lake watershed, and the land use of Liangzi Lake watershed and environmental issues. The sixth chapter is the empirical research by taking Liangzi Lake Watershed as an example, based on the construction of the watershed land use zoning theory system and method system.The author puts forward the target, principle and the basis of function zoning of land use in Liangzi Lake Watershed, and determines the basic unit of land use in Liangzi Lake Watershed area respectively, using a comprehensive analysis of zoning decision tree model based on the construction, as well as watershed land use and the evaluation index system of ecological environment for the system clustering method based on partitioning scheme, forming two sets. Two kinds of partition scheme are analyzed to determine the final partition function of land use in Liangzi Lake Watershed. The seventh chapter is the research on the construction of land use pattern in Liangzi Lake Watershed, mainly puts forward7measures of land use regulation function area, and discusses the land use and land use pattern of coordinated development of ecological environment in Liangzi Lake watershed. The eighth chapter is the summary and prospect of the full text, and analyzes the research conclusion and innovation and the need to further in-depth study of the problem.The research shows that:1. The watershed is a unique structure and function, a relatively independent and complete natural--economic system. There are obvious differences existing in land use types, spatial distribution of land use and land use function. The status of land use ecological function is highlight. Land use zoning is an important measure for the sustainable use of land resources. Land use zoning is a medium in the "eleventh five-year" planning and the main function division under the guidance of certain guidance, and it is the supplement and perfects our country land use zoning research. At present, the study of land use system function partition is not systematic. Especially, studying on the watershed the specific objects on the land use zoning is even rarer. Therefore, it is an important scientific issue of reasonably using the land resources in the watershed and the sustainable utilization to consider the watershed environmental protection requirements and the needs of economic and social development, to divide functional zoning of land use, to reasonablely divide land development and protection of space.2. The specific target of land use function partition includes the leading function of land use, the reasonable land use pattern, water protection and maintenance of watershed ecosystem balance, taking land as a social and economic regulation means. Principles of partition contain regional similarity and regional differences. The principles of leading factor suit one’s measures to local conditions and overall coordination principle. Any kind of land-use types has many, functional properties, but its main function is clear. Combining with the watershed land use-services to humans, the paper divides land use function of watershed into the production function, living function and ecological function. Land use partition function scheme is unique. Grasping the leading function of the regional land use and suitting the measures to local conditions to determine the land use method can give full play to the advantages of each functional area of land use, and to promote the overall development of the whole watershed. The above constitutes the watershed land use theory system function partition.3. Geographic spatial partitioning of diversity, comprehensive study of land use zoning can be seen throughout the comprehensive analysis method of function zoning of land use. Party of work only uses the overlay operation. Cluster analysis is more commonly used and is generally required to combine with the method of index system. The land will be using the function partition method of overlay method. System clustering analysis method has been widely used in combination. Based on the land use characteristics and land use functional differences, two kinds of methods can be used to carry out watershed land use regionalization:the first is comprehensive analysis of partition method based on decision tree model. The second is the watershed land use and the comprehensive evaluation of ecological environment as the leading mark function zoning of land utilization. Using the unit, the divisions of land use comprehensive evaluation subsystem and environment subsystem based on clustering score system, land use function and comprehensive analysis, the watershed can be divided. Land use zoning index system of watershed includes evaluation index system and ecological environment system. Land use evaluation criteria system includes land use conditions, land use and land use of three aspects benefit. Evaluation criterion of ecological environment subsystem includes two aspects:the present situation of ecological environment and the ecological environment pressure. The evaluation criteria contain a number of evaluation factors, reasonably determining the weight of each index. This paper adopts expert scoring method to determine the weight of each evaluation index.4. Liangzi Lake belongs to the suburban lakes, which is one of the best Chinese freshwater lakes water quality at present. Liangzi Lake Watershed is the junction zone of Wuhan City, Ezhou City, Huangshi City and Xianning City. The total area is2417.24km2. Economy of this valley is relatively backward. The development degree is low. There is the more developed tourism industry. At the end of2009, area of agricultural land use in the area is167469hm2. There is a total area of16484hm2for construction. Unused land area is57771hm2. Watershed land use is characteristic of water resources. Water quality is good, but the fragile ecology. Land use type distributions, land use space layout of the regional differences are significant. Tourism landscape land distributions of relatively concentrated environmental problems are facing the contradiction. With urbanization pressure, tourism resources development and environmental protection is becoming more and more significant. There are the excessive development of agriculture and fisheries resources of the threat and the upstream soil erosion.5.The purpose of carrying out research on land use function zoning in Liangzi Lake Watershed is to enrich and perfect the land use system theory and method to guide the formation of functional zoning, land use dominant function in Liangzi Lake Watershed of each area, function of land use in Liangzi Lake Watershed:making good use of water resources in Liangzi Lake Watershed, strengthening ecological protection core waters and catchments, attention ecological agriculture base construction and the integration of urban and rural areas, promoting ecological tourism, providing guarantee for the development of agricultural production and new industry, highlighting the ecological protection function, promoting the land utilization and ecological environment coordinated development, guaranteeing the construction target of watershed ecological tourism zone on the basis of land use zoning theory system and method system. In this paper, the author constitutes Liangzi Lake watershed land use decision tree partition function model, forming a partition scheme of land use function based on decision tree model. This model divides Liangzi Lake watershed into ecological, production and life function areas, a total of7land use function areas. This paper also analyzes the function of land use zoning in Liangzi Lake Watershed based on system clustering method, the method of land use between the subsystem and ecological environmental evaluation index system, calculating the partition unit of land use and ecological environment evaluation score, as the basis for generating cluster analysis, so as to form the partition results. Liangzi Lake Watershed is divided into ecological, production, life and core water four land-use function districts. Comprehensive analysis of the two kinds of partition scheme eventually forms a partition scheme of land using of Liangzi Lake Watershed:27division units can be divided into7functional blocks,3ecological function areas,2production and living function areas, to be specific:the Liangzi Lake core water ecological function protected areas, watershed conservation upstream drainage watershed northern ecological barrier area, ecological function area, basic farmland protection areas, watershed development zone general production function, living function improvement area and downstream development area northwest of life function. Each functional area covers30818hm2,18793hm2,59092hm2,97087hm2,17409hm2,17060hm2and1465hm2respectively. Finally, this paper proposes land use regulation and control measures of each functional area for the development and utilization of land resources in the face of environmental issues through the industrial structure adjustment, ecological barrier construction to form a coordination mechanism and other aspects of construction of Liangzi Lake watershed land use and ecological environment coordinated development model.