Study On Relationship Between Groundwater And Vadose Zone And Supergene Eco-environment In The Plain Area Of North Part Of TianShan Mountain

North part of TianShan Mountain is the most developed area in Xinjiang Province, which is the core of the economic structure of the whole municipality. Because located in arid basin of inland, this area has large asymmetrical water resource. Accordingly, the eco-environment is very vulnerable. Along with advance of urbanization, eco-environment is undergoing degradation because of human activities. Serious eco-environmental issues are threating sustainable development in this area. Some study indicates that groundwater and water-salt in vadose zone are the important factors which directly effect on space distribution structure of supergene ecology. Therefore, it is highly significant for resuming arid natural vegetation and rebuilding eco-enviornment to study on relationship between groundwater and distribution of water-salt in vadose zone and supergene eco-environment. Based on data from fieldwork and lab, this study taking Kuitun River watershed as an example analyzes water-salt distribution rule in vadose zone and drive force in plain area of north part of TianShan Mountain after investigating and sampling from 49 observation spots and 27 drilling holes and analyzing 3480 data from lab test of 220 soil samples and 20 water samples ; It also studies on the relationship between groundwater and distribution of water-salt in vadose zone and supergene eco-environment, which provides scientific basis to eco-environment protection. The outcome of the research as follow:The lithology mainly are clay,silt, fine sand in vadose in Kuitun River watershed; Groundwater depth is less than 5 m in fine soil plain and riverside terrace in middle and lower reaches of Kuitun River.After analyzing water-salt distribution in surface soil and vertical and drive forces of that, I think that lithology structure and hydrogeologocal condition decide space pattern of water-salt in vadose zone, while weather and human activities influence evolvement process of that.Solute movement parameters in situ testing site are obtained. Solute movement of situ testing site is numerically isimulated and the relative error is less than 15% by identify and validation, so they can be used in solute movement simulation. Water-salt distribution of situ testing is accordant with water-salt distribution rule in study area.According to study on the relationship between groundwater and distribution of water-salt in vadose zone and supergene eco-environment, we can know that more shallow groundwater depth, more moisture content in soil, less salt content, better vegetation growth and bigger coverage; contrarily, worse vegetation growth and less coverage. Based on investigation and test data, I further identify suitable moisture content and salt content of the typical vegetation in study area. The suitable moisture content of Tamarix ramosissima, Haloxylon and Populus euphratica respectively are 15-20%,19-33% and 14-24%; and the suitable salt content of Tamarix ramosissima, Haloxylon and Populus euphratica respectively are 0.2-2.0%,0.2-1.0% and 0.2-0.6%.Summarizing ecological groundwater levels as follow: <3mis the salinification level, 3-4m is the normal ecological level , 2-6m is the abrbor and shrub endurance level, 4-8m is the ecology intimidation level, >6m is the desertification level. They are close to previous study. The above outcome of this study will be significant in theory and practice for scientific supergene eco-environment protection and reasonable groundwater exploration and utilization in north part of TianShan Mountain.