Modelling spatio-temporal patterns of sediment yield and connectivity in a semi-arid catchment with the WASA-SED model

Modelling spatio-temporal patterns of sediment yield and connectivity in a semi-arid catchment with the WASA-SED model
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使用 WASA-SED 模型模拟半干旱流域沉积物产量和连通性的时空模式

DOI:
10.1080/02626661003780409
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发表时间:
--
影响因子:
3.5
通讯作者:
J. C. d. Araújo
J. C. d. Araújo
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
P. H. A. Medeiros;A. Güntner;T. Francke;G. L. Mamede;J. C. d. Araújo

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降雨径流引起的土壤侵蚀降低了土壤肥力,并因用于供水的地表水库沉积物而影响供水,特别是在半干旱地区,从而造成严重的环境退化。然而,侵蚀模型开发的实验小区不能直接应用于估计产沙量在集水区的规模,因为沉积物的再分配也控制的运输条件沿着景观。特别是,代表景观连接有关的沉积物转移从上坡地区的河流网络是必需的。在这项研究中,WASA-SED模型被用来评估的空间和时间模式的水和沉积物的连接半干旱中尺度流域(933平方公里)在巴西。它示出了如何在流域内的沉积物连接的空间和时间模式的变化作为景观和事件特征的函数。这就解释了在出口产沙量方面的非线性集水区响应。一、Güntner,A.,弗兰克,T.,马梅德湾L. & de Araújo,J. C.(2010)利用WASA-SED模型模拟半干旱流域的沉积量和连通性的时空模式。Sci. J.55(4),636-648。
Rainfall–runoff induced soil erosion causes important environmental degradation by reducing soil fertility and impacting on water availability as a consequence of sediment deposition in surface reservoirs used for water supply, particularly in semi-arid areas. However, erosion models developed on experimental plots cannot be directly applied to estimate sediment yield at the catchment scale, since sediment redistribution is also controlled by the transport conditions along the landscape. In particular, representation of landscape connectivity relating to sediment transfer from upslope areas to the river network is required. In this study, the WASA-SED model is used to assess the spatial and temporal patterns of water and sediment connectivity for a semi-arid meso-scale catchment (933 km2) in Brazil. It is shown how spatial and temporal patterns of sediment connectivity within the catchment change as a function of landscape and event characteristics. This explains the nonlinear catchment response in terms of sediment yield at the outlet.CitationMedeiros, P. H. A., Güntner, A., Francke, T., Mamede, G. L. & de Araújo, J. C. (2010) Modelling spatio-temporal patterns of sediment yield and connectivity in a semi-arid catchment with the WASA-SED model.Hydrol. Sci. J.55(4), 636–648.
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发表时间: 2004
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DOI: --
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作者:
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DOI: 10.5194/gmdd-1-285-2008
发表时间: 2008
期刊: Geoscientific Model Development Discussions
影响因子: --
作者:
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DOI: 10.1080/02508060408691770
发表时间: 2004-06-01
影响因子: 2.6
作者:
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