Abstract
Quantification of complicated surface morphology of soil crack is a prerequisite and key to soil crack study．This paper takes soil crack quads in Yuanmou add-hot valley region as examples，selecting several morphological indicators．an d an alyzes the soil crack’s morphological featm'es under various development degrees．By statistic analysis，three quantitative indicators for surface morphology are selected,namely soil crack area density,area weighted mean fractal dimension and connectivitv index R．which can not only express the development intensity of soil cracks，but also efectively describe its morphological complexity an dconnectivity．The research results set a good base for the establishment of soil crack assessment system in Yuanmou ad d-hot valley region．
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