Study On Ecological Reconstruction Of Terminal Lakes Of Arid Inland Rivers : A Comparison Of Regional Practice

The terminal lake of the inland river is not only an important component of the ecological environment in the arid area,but also an indicator of the human-land relationship state.Since the 1950 s,under the influence of high intensity of human activities,terminal lakes shrinked or even drought up rapidly,resulting in the ecological environment deterioration,which seriously threatened the sustainable development of the basin.In the beginning of the 21 st century,through delivery ecological water,the practice of saving tail lakes,has been carried out in some watersheds.In this paper,based on the general study of " conveyance ecological water,reconstruction the ecological of the tail lake",this paper sums up the relevant research and combines the field investigation of several watersheds to sum up the evolution law of the tail lake,And the regional characteristics and differences of the different watersheds in the process of ecological reconstruction of the tail lake were compared with the changes of the human-land relationship.The main contents include:In recent 60 years,the typical inland river has experienced rapid shrinking,drying up and human intervention to restore the three stages,the area change was significant "U" type development characteristics.This paper discusses the structure and evolution of watershed landscape units and water resources in the three phases of natural evolution,atrophy,and artificial reconstruction of the tail lake,starting from the evolution of the tail lake,which is the indicator of human-Before the 1950 s,the lake was characterized by "wandering lake",water resources utilization and land development in the basin,from the fluctuation to the continuous growth,the contradiction between human and land accumulation;the 1950 s and 1960 s,a large number of arid areas The reservoir construction,the introduction of runoff into the oasis,the spatial transfer of water resources,changes in the form and distribution of imbalance,the rapid collapse of Lake tail loss,human-land tensions since the beginning of the twenty-first century,the river basin area Water,reservoir ecological scheduling,the release of ecological water,artificial reconstruction of Lake,human relations relieved.According to the characteristics of the tail lake and the reconstruction effect,the watershed practice of the ecological restoration of the tail lake lake is divided into three types: wetland construction type,water area maintenance type and production restoration type.The three types are Qingtu Lake in Shiyang River,Ma Lake and Guolai River bei Haizi as an example,an empirical comparative analysis.Water resources,water supply methods,human intervention measures,and the effect of the project.The results are summarized and compared with each other.The differences between the characteristics and the future are discussed.