Research On River Confluence Urban Spatial Form Coupled In Fractal Physiognomy Of Northern Shaanxi

With the development of northern shaanxi energy, energy enrichment region urbanization rapid ascension, urban space development, but also exposed to the status quo of disharmony. River crossing is the source of northern shaanxi habitat radix rehmanniae, choose it as a town of shaanxi typed a study, a typical significance. Fractal theory as the research of new perspectives and important approaches to the study of the irregular shape, to reveal the internal law of urban form has important theoretical value.Selected case Wu Qi, yanan, Yan Chuan, smaller, valley, jia, suide seven cities to study the space form. Including river junction ecological condition, urban external space form and internal space form, using quantitative research methods of the fractal measurement. The ecological environment of river crossing, such as topography, geomorphology, geological structure, hydrological factors. According to the intersection Angle and spread form, divided the types of cross river crossing. And intersections of vulnerability analysis from the Angle of ecology, to find the key factors restricting the intersections of urban form. External urban space morphology mainly calculates the complexity of the external boundary. Internal key measure urban space morphology and various types of land use of urban space form the total distribution balance and centered on the river intersection, the distribution of the town centripetal agglomeration.In river junction urban space form, on the basis of fractal calculation and character description, according to the river cross types of spatial layout and spatial structure of the law. On the basis of exploring the relationship between urban form and topography. And put forward the corresponding to the coupling between the two regulatory mechanism.Urban form coupling in landform not only to realize ecological benefit, but also from the city to expand the perspective of restricted by the natural environment such as topography, explore to cultivated land protection in harmony with the urban development, realize high efficiency, high efficiency, the urban land operation fair city citizens enjoy the public service facilities space form. Finally reflect on ecosystem and the connotation of the compact city, respectively, in view of the river junction and ideal mode of large and small cities in appropriate space form.