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首页> 外文期刊>Pedosphere: A Quarterly Journal of Soil Science >Relationships between intensity gradation and evolution of soil erosion: a case study of Changting in Fujian Province, China.
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Relationships between intensity gradation and evolution of soil erosion: a case study of Changting in Fujian Province, China.

机译：强度等级与土壤侵蚀演变的关系-以福建省长汀市为例。

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摘要

Soil erosion gradation is a robust and objective quantitative indicator of soil erosion intensity. Recent applications of soil erosion gradation have focused on monitoring soil erosion with models or simulation of soil erosion through gradation trends. However, soil erosion simulation accuracy is generally being reduced due to the rare consideration of the relationship between soil erosion gradation and erosion evolution. In this study, we investigated different soil erosion intensity grades to demonstrate their sensitivity to types and rates of erosion. Specifically, the objective was to define the relationship between soil erosion gradation and soil erosion evolution in Changting, an undeveloped area in Fujian Province, China, for four time intervals (1975, 1990, 1999, and 2006). The time series of erosion gradation were developed by modeling analysis with integration of several erosion indicators, and the relationships between the erosion grades and evolution types and rates were quantified. Comparison of the collapsing forces with natural and restoring forces based on human activity demonstrated that there existed an obvious spatial uncertainty in the erosion evolution types; both positive and negative succession coexisted, and the evolution rates were mostly influenced by the force of policy orientation. The impacts of these driving forces were eventually reflected in the erosion intensity gradation and erosion evolution. The correlation between the negative succession rate and erosion intensity gradation was weak and showed a poor contribution to the average succession rate, while the negative correlation between the positive succession rate and erosion intensity gradation would be increasingly clear as time passed.
机译：土壤侵蚀等级是土壤侵蚀强度的可靠而客观的定量指标。土壤侵蚀等级的最新应用集中于通过模型或通过等级趋势模拟土壤侵蚀来监测土壤侵蚀。但是，由于很少考虑土壤侵蚀等级与侵蚀演变之间的关系，因此通常会降低土壤侵蚀模拟的准确性。在这项研究中，我们调查了不同的土壤侵蚀强度等级，以证明它们对侵蚀类型和速率的敏感性。具体而言，目的是确定四个时间间隔（1975年，1990年，1999年和2006年）在中国福建省欠发达地区长汀的土壤侵蚀等级与土壤侵蚀演变之间的关系。通过综合几个侵蚀指标的建模分析，建立了侵蚀等级的时间序列，并对侵蚀等级与演化类型和速率之间的关系进行了量化。基于人类活动的破坏力与自然力和恢复力的比较表明，侵蚀演化类型存在明显的空间不确定性。正继承和负继承都并存，演进速度主要受政策导向的影响。这些驱动力的影响最终反映在侵蚀强度等级和侵蚀演变中。负演替率与侵蚀强度等级之间的相关性较弱，对平均演替率的贡献较弱;而随着时间的流逝，正演替率与侵蚀强度等级之间的负相关性将越来越明显。

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