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为定量评价赣州地区30 a来水土流失治理对生态环境变化的影响,基于水土流失状况构建了赣州市生态安全评价指标体系。利用“压力—状态—响应”模型,从水土流失角度,采用频度统计法和专家咨询法,构建了17个评价指标,首次对赣州地区生态安全状况进行了评价。结果表明:(1)经过30 a的水土流失治理,赣州地区生态安全水平得到明显提高,但局部地区出现了不同程度降低,整体生态安全等级处于Ⅲ级水平,生态环境有待进一步的改善;(2)赣州地区水土流失与生态安全呈现明显的负相关性,经过30 a的水土流失治理,赣州市水土流失与生态安全的负相关性逐渐减弱,水土流失对该地区的生态安全影响逐步降低,因此,水土保持是改善该地区生态环境的重要途径之一。
In order to quantitatively evaluate the impact of soil and water loss control on ecological environment change in Ganzhou in the past 30 years, an index system of ecological security assessment of Ganzhou was constructed based on soil erosion. Using the “pressure-state-response” model, we constructed 17 evaluation indexes from the perspective of water and soil loss using frequency statistics and expert consultation, and evaluated the ecological security in Ganzhou for the first time. The results showed that: (1) After 30 years of soil and water conservation, the level of ecological security in Ganzhou was significantly increased, but some areas were reduced to some extent, the overall level of ecological security was at the level Ⅲ, and the ecological environment needed to be further improved; ) There is a clear negative correlation between soil erosion and ecological security in Ganzhou area. After 30 years of soil erosion control, the negative correlation between soil erosion and ecological security in Ganzhou has gradually weakened, and the impact of soil and water loss on ecological security in the area has been gradually reduced. Therefore, Soil and water conservation is one of the important ways to improve the ecological environment in this area.