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首页> 外文期刊>International journal of applied mechanics >Spatiotemporal Evolution of Landscape Ecological Risk Based on Geomorphological Regionalization during 1980-2017: A Case Study of Shaanxi Province, China
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Spatiotemporal Evolution of Landscape Ecological Risk Based on Geomorphological Regionalization during 1980-2017: A Case Study of Shaanxi Province, China

机译：1980 - 2017年基于地貌区域化的景观生态风险的时空演变 - 以陕西省为例

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摘要

Land surface elements, such as land use, are in constant change and dynamically balanced, driving changes in global ecological processes and forming the regional differentiation of surface landscapes, which causes many ecological risks under multiple sources of stress. The landscape pattern index can quickly identify the disturbance caused by the vulnerability of the ecosystem itself, thus providing an effective method to support the spatial heterogeneity of landscape ecological risk. A landscape ecological risk model based on the degree of interference and fragility was constructed and spatiotemporal differentiation of risk between 1980 and 2017 in Shaanxi Province was analyzed. The spatiotemporal migration of risk was demonstrated from the perspective of geomorphological regionalization and risk gravity. Several conclusions were drawn: The risk of Shaanxi Province first increased and then decreased, at the same time, the spatial differentiation of landscape ecological risk was very significant. The ecological risk presented a significant positive correlation but the degree of autocorrelation decreased. The risk of the Qinba Mountains was low and the risk of the Guanzhong Plain and Han River basin was high. The risk of Loess Plateau and sandstorm transition zone decreased greatly and their risk gravities shifted to the southwest. The gravity of the Guanzhong Plain and Qinling Mountains had a northward trend, while the gravity of the Han River basin and Daba Mountains shifted to the southeast. In the analysis of typical regions, there were different relationships between morphological indicators and risk indexes under different geomorphological features. The appropriate engineering measures and landscape management for different geomorphological regionalization were suggested for effective reduction of ecological risks.
机译：土地使用的土地表面元素处于恒定变化和动态平衡，驱动全球生态过程的变化，形成表面景观的区域区分，这导致多种压力源下的许多生态风险。景观模式指数可以快速识别生态系统本身的脆弱性引起的干扰，从而提供了一种有效的方法，以支持景观生态风险的空间异质性。分析了基于干扰和脆性程度的景观生态风险模型，分析了陕西省1980年至2017年间风险的时空分化。从地貌区域化和风险重力的角度来证明了风险的时空迁移。绘制了几个结论：陕西省的风险首次增加，然后减少，同时，景观生态风险的空间分化非常显着。生态风险提出了显着的正相关性，但自相关的程度降低。 Qinba山脉的风险很低，冠中平原风险和汉河流域的风险很高。黄土高原和沙尘暴过渡区的风险大大降低，风险重力转移到西南部。冠中平原和秦岭的重力有北方趋势，而汉江流域和大巴山的重力转移到东南部。在对典型区域的分析中，在不同地貌特征下的形态指标与风险指标之间存在不同的关系。建议有效减少生态风险的适当工程措施和景观管理。

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