A Case Study On The Valley Type Regional Small Watershed Eco-Landscape Unit Of The Human Settlements On The Loess Plateau--Daxigou Of Jia County

The paper focuses on the case study of the valley type regional small watershed Eco-landscape unit of Human settlements, which is part of the fund research project "The theory and method research of ecological landscape security pattern for the planning of human settlements on loess plateau". It was supported by the National natural science Foundation of China.Directed by theoretical model of valley type regional small watershed eco-landscape unit ,based on three typical classification as "valley type", "river valley type" and "flatland type", the study case choose the area Daxigou of Jia county.According to the actual condition of the loess plateau, bringing together theories of ecology, eco-landscape and the science of human settlements, with analyzing the eco-landscape pattern, the case study was started form establish boundaries of eco-landscape unit to scientific investigation with whole unit.The study figures out the way to classify the edge of geomorphological and hydrological unit in "valley type" of Daxigou small watershed human settlements ecological unit in Jia county, Shanxi province. Then the article analyzes the basic features of elements of systems'scattering in land space, and the contradiction of small watershed human settlements ecological unit's edge and management edge, analysed the problems of elements systems in different watershed pieces in the unit. Being based on the research works before, the article then set out the problems of morphology and cultureof cities and towns in Jia county, the historic city of "Island type".Being directed by the theoretical proposition of human settlements ecological unit security model in loess plateau, the study systematically reconstruct the landscape elements of Daxigou small watershed human settlements ecological unit, and set up the natural system, human living support system and human construction system, and outline the ecological security pattern in the unit. After the research on relation between geomorphological space and the small cities&towns' scattering. Therefore, the article explores the trend and the scale of small cities&towns on top of Mao in the unit. Finally the article tried to explore the correspond between the protection and the development and natural environment background.Eventually, according to the research before, the paper then give out the idea of whole plan and designing in unit edge method for "small cities and towns' developing and set up the ecological view in plan&design of different watershed pieces ecological security in the unit. Aiming at protecting the historic city of Jia county, the paper creationarily set up the idea of choosing the constructing place in upper watershed unit.