Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.catena.2015.11.006 |
An approach to assess the impact of landscape connectivity and effective catchment area upon bedload sediment flux in Saco Creek Watershed, Semiarid Brazil | |
Souza, Jonas O. P.; Correa, Antonio C. B.; Brierley, Gary J. | |
通讯作者 | Souza, Jonas O. P. |
来源期刊 | CATENA
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ISSN | 0341-8162 |
EISSN | 1872-6887 |
出版年 | 2016 |
卷号 | 138页码:13-29 |
英文摘要 | Sediment flux in semi-arid drainage networks is influenced by landscape connectivity, wherein natural land forms and hydro infrastructure networks such as low order dams impede the downstream transfer of sediment. This study analyzes how drainage impediments affect bedload transport within Saco Creek watershed, in semiarid northeast Brazil. Geomorphology and land use maps are constructed to assess changes to short term landscape connectivity. Bedload conveyance is appraised for precipitation/runoff events of variable magnitude frequency relationships. From this, ’effective’ rainfall events are determined. Analysis of the type and location/pattern of drainage impediments is used to assess effective catchment area under three distinct runoff scenarios. In the low magnitude event scenario, only 33.8% of the watershed area contributed effectively to sediment flux. In moderate and high magnitude events this value increased to 61.6% and 70.8% respectively. The relatively small variation from moderate to high magnitude events reflects the operation of dams which store bedload sediments. Findings from this study can be used to show how landscape connectivity analysis can support dam management in semiarid agrarian landscapes. (C) 2015 Elsevier B.V. All rights reserved. |
英文关键词 | Landscape connectivity Semiarid environment Fluvial geomorphology Effective catchment area |
类型 | Article |
语种 | 英语 |
国家 | Brazil |
收录类别 | SCI-E |
WOS记录号 | WOS:000368962100002 |
WOS关键词 | NEW-SOUTH-WALES ; CHANNEL ADJUSTMENTS ; WOLUMLA CATCHMENT ; LAND-USE ; RIVER ; SENSITIVITY ; VEGETATION ; STORAGE ; TIME ; (DIS)CONNECTIVITY |
WOS类目 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
WOS研究方向 | Geology ; Agriculture ; Water Resources |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/191981 |
作者单位 | Univ Fed Paraiba, Cidade Univ, BR-58059900 Joao Pessoa, Paraiba, Brazil |
推荐引用方式 GB/T 7714 | Souza, Jonas O. P.,Correa, Antonio C. B.,Brierley, Gary J.. An approach to assess the impact of landscape connectivity and effective catchment area upon bedload sediment flux in Saco Creek Watershed, Semiarid Brazil[J],2016,138:13-29. |
APA | Souza, Jonas O. P.,Correa, Antonio C. B.,&Brierley, Gary J..(2016).An approach to assess the impact of landscape connectivity and effective catchment area upon bedload sediment flux in Saco Creek Watershed, Semiarid Brazil.CATENA,138,13-29. |
MLA | Souza, Jonas O. P.,et al."An approach to assess the impact of landscape connectivity and effective catchment area upon bedload sediment flux in Saco Creek Watershed, Semiarid Brazil".CATENA 138(2016):13-29. |
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