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首页> 外文期刊>Earth-Science Reviews: The International Geological Journal Bridging the Gap between Research Articles and Textbooks >Effects of terracing practices on water erosion control in China: A meta analysis
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Effects of terracing practices on water erosion control in China: A meta analysis

机译：梯田实践对我国水腐蚀控制的影响：META分析

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Terracing has long been considered a strategy for soil and water conservation in many mountainous regions of the world. However, the effectiveness of terracing is limited by many factors, such as climate, soil properties, topography, land use, culture, demography and socioeconomic status. The aim of this critical review is to evaluate the roles of terracing on water erosion control in China. A meta-analysis of 601 runoff and 636 sediment observations involving a diversity of terrace structures was conducted. These 1237 observations involved level terraces, slope-separated terraces, slope terraces, zig terraces, fanya juu terraces and half-moon terraces, wide geographical locations within China, a diversity of land uses from forests to bare land, and a slopes ranging from 3 to 35. The results confirmed that terracing significantly and positively affected water erosion control. In terms of different terrace structures, bench terraces were superior with respect to runoff and sediment reductions. Land use also played a crucial role in the efficiency of erosion control; terraces associated with tree crops and forests conserved the greatest amount of soil and water. In addition, a significant positive correlation between slope gradient (3-15 and 16-35) and the effect of terracing on water erosion control was observed with the greatest decreases in water erosion occurred at slopes of 26-35 and 11-15. This study revealed the effectiveness and variations of terracing with respect to water erosion control at the national scale and can serve as a scientific basis for land managers and decision makers. However with increasing urbanization, terrace abandonment increases as does the loss of place-based knowledge regarding terrace construction and maintenance.
机译：梯田长期以来一直被认为是世界上许多山区水土保持的战略。然而，梯田的有效性受到许多因素的限制，例如气候，土壤性质，地形，土地利用，文化，人口统计和社会经济地位。这一关键评论的目的是评估梯田对中国水腐蚀控制的作用。进行了601次径流和636个沉积物观察的META分析，涉及多样性露台结构。这1237年观察涉及水平露台，坡度分离露台，斜率露台，锯齿露台，围塔，中国内部地理位置广阔的地理位置，从森林到赤裸的土地，以及3的山坡到35.结果证实梯田显着且积极地影响了水腐蚀控制。就不同的露台结构而言，基准露台涉及径流和沉积物减少。土地使用也在侵蚀控制效率方面发挥了至关重要的作用;与树木作物和森林相关的露台保存了最大的土壤和水。此外，斜坡梯度（3-15和16-35）之间的显着正相关性和梯田对水侵蚀对照的影响，在26-35和11-15的斜坡上发生了最大的水腐蚀。本研究揭示了国家规模水侵蚀露台的有效性和变化，可以作为土地管理人员和决策者的科学依据。然而，随着城市化的增加，露台放弃就会增加，基于地面的露台建设和维护的知识损失增加。

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