Reconstruction of paleo-irrigation canals and cultivated fields based on high-resolution satellite images, and classification of their patterns

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Based on the analysis of high-resolution Satellite Images, relative height of the tamarix cones covering the ruins and ages of the scattered earthenware, agricultural field casts of the Han Dynasty and Xixia-Yuan Dynasties are identified with relatively high reliability. As results, it is cleared the expansion of the agricultural fields of Xixia-Yuan Dynasty was more extensive than previously considered. Moreover, casts of the Ou tian cultivation and Dai tian one are extracted, and unreported wall-surrounded city, named Bj2008, was newly reported