Study On The Soill Salinization Of Arid Area And Its Dynamic Change Using Remote Sensing

It is a scientific theme of soil in the 21st century in China that improving soil quality promotes agriculture to develop continuously. The salinization is one of the main types desertificated and the land degradation. Arid area took national the whole area 1/3 in China .The salinized soil is distributed among them extensively. The salinization question and irrigating caused sub-salinization question is the main obstacle of restricting district agricultural development it is also an key factor with steady ecological environment in the oasis too.soil salinization question is always a district sustainable development and strategic question of improving environmental quality in arid area .Especially at present, with the national development of western regions, it is human life and production and coordination in the natural environment that the research of the land salinization is exactly effective, make a contribution to improving human life quality This text oasis the typical district on field with arid area, use the pattern process of remote sensing to analyses technology , analyses the land resource of the salinization through the geographical space of information system, explore in an all-round way and quantitative appraisal aridity , semi-arid region land salinization, propose the change on time and space yardstick of salinization land , the driving force of the land salinization of studying area of comprehensive appraisal, have steeped administration of the ground and area agricultural sustainable development decision for the salt and offers scientific propose, offers experience for other arid area research work on land of salinization at the same time. 1 Combine latest research results and forefathers;both at home and abroad in arid work of district;observe traditional field and experiment, open-air soil investigate, make an overall evaluation, studied the dynamic change in the soil salinization current situation , carry on the comprehensive appraisal of driving force of the soil salinization, offer the suggestion of improvement . 2 Use Landsat TM remote sensing data to obtain surface feature information. Investigate the assisting of the relation and soil and groundwater monitoring data among the surface feature and image established the relation of the spectrum characteristic with surface feature ,using two kinds of classification and improved post-classification, methods lies two respects: 1)Salt steep spectrum luminance value curve of ground higher than surface feature average luminance value curve obviously, and other surface feature luminance value lower than or have around average luminance value curve little wave (water body mean the land water areas among them obviously, including the river and surface of water , surface of water of the reservoir and hole pool surface of water By view trend of the...