Temporal and spatial changes of soil salinization and improved countermeasures of Tarim Basin Irrigation District in recent 25 a
He‐Ping Li · Ganhanqu dili · 2011
Based on the principle of scientificalness and computer operability,with the help of analytical method of combining multi-disciplinary with 3S technology,the classification system and interpretation signals of soil salinization were established.The study shows that the area of soil salinization is the product of combination of natural and human factors,and human activities contribute to the development of salinization;in addition,soil salinization is mainly distributed in the north and west parts of the Tarim Basin.The main hazardious areas are in the Kashi River and Yarkand River Basin basins with salinization being translated from the old irrigation areas to the new ones and from medium-degree and heavy-degree salnization to light-degree salinization.SO2-4 and Cl-ions gravity center is shifted forward the center of the basin.According to the characteristics of soil salinization and evolution in this area,the strategy and comprehensive methods are put out to improve basin irrigation management of soil salinization,namely: uniforming irrigation system,adjusting the agricultural structure,reseanablly using water,changing soil's physical-chemistry properties,setting up engineering measurements.