Soil erosion in gully catchments affected by land-levelling measures in the Souss Basin, Morocco, analysed by rainfall simulation and UAV remote sensing data

Soil erosion in gully catchments affected by land-levelling measures in the Souss Basin, Morocco, analysed by rainfall simulation and UAV remote sensing data
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通过降雨模拟和无人机遥感数据分析摩洛哥苏斯盆地土地平整措施影响的沟渠流域土壤侵蚀

DOI:
10.1016/j.catena.2013.09.004
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发表时间:
2014
期刊:
影响因子:
6.2
通讯作者:
Aït Hssaïne
Aït Hssaïne
中科院分区:
农林科学1区
文献类型:
--
作者:
d'Oleire-Oltmanns;Marzolff;Aït Hssaïne

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在摩洛哥南部的Souss山谷,平整土地的措施被广泛用于改变土地使用。然而,它们对该地区土壤侵蚀的影响尚不清楚。本文介绍了结合降雨模拟试验和沟壑制图的准时过程分析以及利用无人机遥感数据进行局部尺度的体积定量分析的方法。从而阐明了集水区土地平整对沟道线性土壤侵蚀的影响。土地平整改变了土壤表面的特性,导致产生更多的径流和沉积物。平均径流系数从54%到58%,发现在平整的研究地点,38%到47%,发现在未受干扰的地区。平均泥沙负荷达到48.6 g m− 2至81 g m− 2的影响下,平整,但只有9.3 g m− 2至23.7 g m− 2没有它。土壤侵蚀的定量无人机数据表明,在平整的研究现场的沟壑侵蚀约720 m3的土壤在一个降雨周期。由于土地平整,集水区的表面平均降低了0.054米,而在没有土地平整的研究地点,监测没有显示在两个不同的时间点的冲沟的形状和范围的显着差异。土地平整的强烈影响可以通过这两种方法的联系来证明。土地平整措施明显加剧了土壤侵蚀。
Land-levelling measures are widely used in the Souss valley, South Morocco, for the implementation of land use change. However, their impact on soil erosion in this region is unclear. This paper presents the approach of combining punctual process analysis through experimental rainfall simulation and gully mapping as well as volume quantification analysing on a local scale using unmanned aerial vehicle (UAV) remote sensing data. Thus, the influence of the impacts of land levelling in the catchment area on the linear soil erosion by gullies can be elucidated. Soil surface characteristics, modified by land levelling, lead to higher runoff generation and sediment production. Mean runoff coefficients from 54% to 58% are found in levelled study sites, and 38% to 47% are found in undisturbed areas. Mean sediment loads reach 48.6 g m− 2to 81 g m− 2under the influence of levelling, but only 9.3 g m− 2to 23.7 g m− 2without it. Quantification of soil erosion by UAV data showed that a gully in a levelled study site eroded about 720 m3of soil within only one rain period. The surface of the catchment area was lowered 0.054 m on average due to land levelling, whereas in study sites without land levelling, the monitoring did not show significant differences of shape and extent of the gullies at two different points in time. The strong influence of land levelling can be documented with the connection of these two methods. A clear amplification of soil erosion is induced by land-levelling measures.
摩洛哥西南部苏斯盆地的上新世-第四纪河流和风积记录:地貌模型
DOI: 10.1016/j.gloplacha.2009.03.002
发表时间: 2009
影响因子: 3.9
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影响因子: 6.5
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DOI: --
发表时间: 2011
期刊:
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DOI: 10.3390/rs4113390
发表时间: 2012-11-01
期刊: REMOTE SENSING
影响因子: 5
作者:
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