In order to probe into distribution features of soil anti-scourability in the upper-middle reaches of Yangtze river, the field tests on soil anti-scourability at 50 test-plots of 9 provinces were conducted by the undisturbed-soil trough scouring method. The results show that soil anti-scourability varies with soil and is to be ranged from strong m weak in order of red soil, yellow soil, brown soil, limestone soil, purple soil, cinnamon soil. There exist three types of soil anti-scourability along the vertical profile, namely, soil texture determination type, cultivation determination type and ...
