Through artificial rainfall experiments, characteristics of exogenous rare earth elements and P loss with surface runoff(both in the water and sediment) during simulated rainfall were investigated under the conditions of various slope gradient(5°, 10°, 15°, 20° and 25°) and different rainfall intensity(43mm/h, 83mm/h and 115mm/h). Results showed that majority of rare earth elements(Nd, Ce, La) and phosphorous transport with the soil particles in runoff, which was more than 92%. The total amount of rare earth elements and phosphorous loss in runoff were correlated significantly. Under the different rainfall intensity conditions, loss amounts of rare earth elements and phosphorous were showing a parabola type relation and increasing with the slope gradient. There was a turning point when the slope gradient increased to some extent and the critical gradient ranged from 22° to 26°.
|Original language||English (US)|
|Number of pages||9|
|Journal||Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering|
|State||Published - Oct 1 2010|
All Science Journal Classification (ASJC) codes