Evaluating of Sediment Delivery Ratio on Spatial and Temporal Variabilities in Semiarid Watershed Brazil | Chapter 14 | Advances and Trends in Agricultural Sciences Vol. 2
Evaluation of sediment delivery ratio
is important for determining watershed sediment yield. Rates of both interrill
and rill erosion were calculated under shrub and uncovered Inceptisols
conditions and were not observed to the presence by ravines and gullies in the
watershed of Jacu River, in a semiarid region, Brazil. Direct measurement
campaigns of suspended sediment and bedload were also carried out by means of
the US DH–48 for collection of suspended sediment samples and US BLH–84 used to
collect samples bed load. The soil loss due to interril erosion under uncovered
conditions was equal to 8.43 t ha-1 and was considered high, and the
same was true for the values of rill erosion with erodibility equal to
0.0021142 kg N-1 s-1 and critical shear stress (τc) equal
to 2.34 Pa. The mean value of sediment delivery ratio of Jacu watershed was
equal to 0.165 and ranged from 0.29 in the year 2008 to 0.026 in 2010. This
variation was associated with the natural variability of semiarid environment,
indicating the necessity of assessment for a longer period to deepen our
knowledge of sediment delivery ratio of the Jacu semiarid watershed.
Author(s) Details
Victor Casimiro Piscoya
Department of Rural
Technology, Environmental Engineering Pós- Graduate Rural Federal of Pernambuco
University (UFRPE), Recife-PE, Brazil.
Vijay P. Singh
Department of Biological and
Agricultural Engineering and Zachry, Department of Civil Engineering, Texas
A&M University, College Station, Texas 77843-2117, USA.
José Ramon Barros Cantalice
Department of Rural
Technology, Environmental Engineering Pós- Graduate Rural Federal of Pernambuco
University (UFRPE), Recife-PE, Brazil.
Moacyr Cunha Filho
Department of Informatics
and Statistics, Rural Federal of Pernambuco University (UFRPE), Recife-PE,
Brazil.
Sergio Monthezuma
Santoianni Guerra
Department of Rural
Technology, Environmental Engineering Pós- Graduate Rural Federal of Pernambuco
University (UFRPE), Recife-PE, Brazil.
Cristina dos Santos Ribeiro
Environmental Engineering
Pós- Graduate Rural Federal of Pernambuco University (UFRPE), Recife-PE, Brazil
Renisson Neponuceno de
Araújo Filho
Federal University of
Tocantins (UFT), Tocantins, Brazil.
Sandro Augusto Bezerra
Federal Institute of
Pernambuco-Campus Vitória de Santo Antão (IFPE), Recife-PE, Brazil.
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