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首页> 外文会议>2010 International conference of international conference on combating land degradation in agricultral areas. >Study on runoff and sediment transport under LUCC in typical watershed of Loess Plateau
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Study on runoff and sediment transport under LUCC in typical watershed of Loess Plateau

机译：黄土高原典型流域土地利用/覆被下径流输沙研究

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摘要

Analysis of runoff and sediment transport change based on land use data from 1986 to 1994, and from 1995 to 2004, using statistical comparison and frequency distribution curves reveals the following. First, land use and forest vegetation had significant impact on annual runoff and sediment transport in the watershed of Loess Plateau. Runoff generation and annual sediment transport in the Iater period, in which vegetation cover was increased and area of slope land and bare land was decreased, was lower than that in the former period. On wet, normal, and dry years, runoff coefficients in the latter period were reduced by 51%, 85%, and 84%, respectively in comparison with the former period. Second, impact of land use and forest vegetation on watershed runoff sediment transport had seasonal characteristics. Under the same precipitation conditions, predictions for the latter period were reduced by 50% to 100% compared with that in the former period. Finally, peak discharge had positive response to land use and forest vegetation within the same frequent rainfall intensity, which showed a decreasing trend.
机译：根据统计数据和频率分布曲线，根据1986年至1994年以及1995年至2004年的土地利用数据，对径流和泥沙迁移变化进行分析。首先，土地利用和森林植被对黄土高原流域的年径流量和泥沙输送具有重大影响。植被增加，坡地和裸地面积减少的时期，径流产生和年输沙量均低于前期。在湿年，正常年和干旱年，后一时期的径流系数分别比前一时期减少了51％，85％和84％。其次，土地利用和森林植被对流域径流沉积物迁移的影响具有季节性特征。在相同的降水条件下，后期的预报比前期减少了50％至100％。最后，在相同的频繁降雨强度下，洪峰流量对土地利用和森林植被具有正响应，呈下降趋势。

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