Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.5935/1806-6690.20170006 |
Sediment delivery ratio in a small semi-arid watershed under conditions of low connectivity | |
Neves dos Santos, Julio Cesar1; de Andrade, Eunice Maia2; Augusto Medeiros, Pedro Henrique3; de Queiroz Palacio, Helba Araujo3; de Araujo Neto, Jose Ribeiro3 | |
通讯作者 | Neves dos Santos, Julio Cesar |
来源期刊 | REVISTA CIENCIA AGRONOMICA
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ISSN | 1806-6690 |
出版年 | 2017 |
卷号 | 48期号:1页码:49-58 |
英文摘要 | The semi-arid region in the northeast of Brazil is characterised by rains of high intensity and short duration, with the processes of erosion being aggravated by an inappropriate land-use model. In this region, the lack of measured data for runoff and sediment yield increases the need to apply hydro-sedimentological models in estimating erosion, requiring knowledge of the actual sediment delivery ratio for the region. The aim of this study therefore, was to map soil erosion, making use of the Universal Soil Loss Equation (USLE), in the Iguatu Experimental Watershed (IEW). The mean annual sediment delivery ratio (SDR), and the SDR for individual events, was calculated from hydro-sedimentological measurements, contributing to an understanding of the processes of sediment propagation in the Brazilian semi-arid region, allowing identification of areas susceptible to water erosion. The IEW has an area of 16.74 km(2) and is equipped with sensors for the continuous measurement of rainfall, flow and sediment yield. The mean annual SDR for the IEW was 0.37%. The SDR for individual rainfall events ranged from 0.08 to 1.67%, with an average of 0.68%. Among the main variables that influence the SDR for individual events is the magnitude of rainfall depth and antecedent soil moisture that can be better represented by the total antecedent precipitation of the previous 15 days. According to maps of soil loss, only 6.27% of the watershed presented losses beyond tolerable limits. |
英文关键词 | Sediment yield Soil erosion USLE SDR |
类型 | Article |
语种 | 英语 |
国家 | Brazil |
收录类别 | SCI-E |
WOS记录号 | WOS:000390218400006 |
WOS关键词 | SOIL-EROSION ; HYDROLOGICAL CONNECTIVITY ; INTEGRATED USE ; RIVER-BASIN ; CATCHMENT ; GIS ; BRAZIL ; YIELD ; (DIS)CONNECTIVITY ; ENVIRONMENT |
WOS类目 | Agriculture, Multidisciplinary |
WOS研究方向 | Agriculture |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/202078 |
作者单位 | 1.Inst Fed Triangulo Mineiro, Fazenda Sobradinho S-N,Caixa Postal 592, BR-38400974 Uberlandia, MG, Brazil; 2.Univ Fed Ceara, Ctr Ciencias Agr, Dept Engn Agr, Fortaleza, Ceara, Brazil; 3.Inst Fed Educ Ciencia & Tecnol Ceara IFCE, Fortaleza, Ceara, Brazil |
推荐引用方式 GB/T 7714 | Neves dos Santos, Julio Cesar,de Andrade, Eunice Maia,Augusto Medeiros, Pedro Henrique,et al. Sediment delivery ratio in a small semi-arid watershed under conditions of low connectivity[J],2017,48(1):49-58. |
APA | Neves dos Santos, Julio Cesar,de Andrade, Eunice Maia,Augusto Medeiros, Pedro Henrique,de Queiroz Palacio, Helba Araujo,&de Araujo Neto, Jose Ribeiro.(2017).Sediment delivery ratio in a small semi-arid watershed under conditions of low connectivity.REVISTA CIENCIA AGRONOMICA,48(1),49-58. |
MLA | Neves dos Santos, Julio Cesar,et al."Sediment delivery ratio in a small semi-arid watershed under conditions of low connectivity".REVISTA CIENCIA AGRONOMICA 48.1(2017):49-58. |
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