Influence of slope and rainfall intensity on the rare earth elements and phosphorous loss from soil with surface runoff

Tao Liang, Lingqing Wang, Yayan Hu, Zhongyi Chong, Weili Wang, Hongying Cao, Peter J A Kleinman

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

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 languageEnglish (US)
Pages (from-to)741-749
Number of pages9
JournalYingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering
Volume18
Issue number5
DOIs
StatePublished - Oct 1 2010

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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