The Spatial And Temporal Variation Regularity Of Water And Saltat Different Gradients Of Midstream Plains In Keriya Irver

Water is an essential conditions in human survival, life and development, whichis a key factor affecting the stability of ecological and socio-economic development.Inthe background of the water shortages and distribution unbalanced in China, theproblems of water resources in arid and semiarid regions become the most importantseries of ecological problems, fully grasp the distribution of water and salt is therational development, utilization and protection of water resources premise.In thispaper, to the river plain area in Keriya Basin for example, to study the groundwaterlevel, the quality of groundwater, the feature in spatial and temporal distribution of thesoil salinity and the relationship between the groundwater depth and soil salinity.Through the field investigation, laboratory tests, geostatistical and spatial dataanalysis method to analyze the temporal and spatial distribution features, and usethe coupling evaluation model and Stella models to analyses the relationship betweenthe groundwater depth and soil salinity and the main factor of the feedbackmechanism.1. Study of the time and spatial differentiation groundwater level domain law on theriver plain area of Keriya Basin；2. Study of the time and spatial differentiation oftemporal maximum and minimum of the groundwater salinity on the river plain areaof Keriya Basin;3. Study of the time and spatial differentiation distributioncharacteristics of the surface soil salinity on the river plain area of Keriya Basin;4.Study of the Spatial correlation and coupling of the embedded depth of groundwater,groundwater quality and soil salinity on the river plain area of Keriya Basin;5. Studyof the feedback mechanism between the socio-economic and ecological subsystemsand water and salt. The results:1. The gradient at different levels in the embeddeddepth of groundwater, there are different in variation of the spatial and temporal: inthe latitudinal gradient, groundwater depth gradually increases from the northern tothe southern low-lying areas at high altitudes and low groundwater depth in thesouthern latitudes of the active greater than the northern high latitudes, and themagnitude of groundwater level change is also showing the same trend; In the longitude gradient, high groundwater level of activity in eastern is higher than westernlongitude region lower longitude regions, the spatial and temporal variations ofgroundwater depth influenced by rivers, the farther distance from the river, thesmaller the impact and change, on the other hand, the greater; on the influence side ofthe river, the current is greater than the influence of the ancient river.2. In thenorthern district of the plains, the largest high latitudes groundwater salinitysignificantly higher than the low southern latitudes, the largest salt content higher thaneastern and central regions, but the magnitude of groundwater salinity changes smally;With the trend of groundwater salinity of rivers, the higher the more in thedownstream, and the ancient river channel is higher than the existing groundwatersalinity of groundwater salinity.3. Salt content of the soil surface in southern plainareas is higher than the northern areas in the Keriya Rivers, and with the riverdownstream soil salt content is higher; Salt content of the soil surface in is greaterthan the eastern region of high longitude, the soil salinization in Karky rural is moreserious, serious soil salinization situation exists in the western part of the region;Ancient river area soil salinity is higher than the existing river soil salt content; Saltcontent of the soil surface in the crop growing season is greater than the non-growingseason in plain area Keriya, but the magnitude of soil salinity changes larger;4. Fromthe perspective of soil salinity on the vertical analysis, each soil salinity distributionroughly the same, the western and eastern regions Karky rural roads rivers flowingthrough the region Keriya annular distribution, while central Wuxile township, andother regions of the penal farm showed a zonal distribution; In the vertical distributionof soil salinity,20~40cm layer salinity distribution characteristics change moreobvious, and in the other layers, soil salinity plain areas of the eastern and westernregions changed small, only Xiwule township in central changes in salinity region isrelatively obvious; On the20~40cm layer of soil salinization,in addition to some ofthe most serious soil salinity region decreased slightly, other regions have slightlyincreased salinity.5. Proved by the coupling degree evaluation model shows that thehigher the degree of coupling between the groundwater level and the salt content ofthe soil surface, and the smaller the groundwater depth and soil salt content inverse relationship; It also described that the coupling evaluation model suitable KeriyaRiver plain area, but also further described in the distribution status of groundwaterdepth domain Keriya River plain area, roughly the trend surface soil salinitydistribution, make it convenient that in the research of the future monitoring andresearch the groundwater and soil salinity.