Quantifying land use contributions to suspended sediment in a large cultivated catchment of Southern Brazil (Guaporé River, Rio Grande do Sul)

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• 作者：Tales Tiecher^a ; ^{tales.tiecher@gmail.com} ; Jean Paolo Gomes Minella^b ; Laurent Caner^c ; Olivier Evrard^d ; Mohsin Zafar^e ; Viviane Capoane^b ; Marion Le Gall^d ; Danilo Rheinheimer dos Santos^b
• 关键词：Soil erosion ; Sediment fingerprinting ; Sediment tracing ; Conservational agriculture
• 刊名：Agriculture, Ecosystems & Environment
• 出版年：2017
• 出版时间：16 January 2017
• 年：2017
• 卷：237
• 期：Complete
• 页码：95-108
• 全文大小：2792 K
• 卷排序：237

文摘

Soil degradation by water erosion remains excessive in Brazil. The contribution of potential sources was investigated in a 2032-km2 cultivated catchment. Cropland is unambiguously the main source supplying sediment to the Guaporé River (91 ± 15%). Cropland supply about 2.17 Mg ha−1 yr−1 of sediment yield to the investigated river. Local magnitude of cropland contribution increased with the drained cropland surface area. There is an urgent need to better plan land use and farming practices in similar areas of Southern Brazil.