Selection of judging indicators for surface morphology of soil crack under different development degrees in Yuanmou arid-hot valley region.

摘要

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 arid-hot valley region in Yunnan, China, as examples, selecting several morphological indicators, and analyses the soil crack's morphological features under various development degrees. By statistical analysis, three quantitative indicators for surface morphology were selected, namely soil crack area density, area weighted mean fractal dimension and connectivity index R, which can not only express the development intensity of soil cracks, but also effectively describe its morphological complexity and connectivity. The research results set a good base for the establishment of soil crack assessment system in Yuanmou arid-hot valley region.