流域景观生态健康演变及其驱动因子贡献分析

从景观格局的角度对漳卫南运河流域3个年代(20世纪80年代、20世纪90年代、21世纪00年代)的流域景观状态进行健康评价;在分析其生态健康演变趋势的基础上,识别气候变化以及人类活动的影响作用,基于土地类型分析区分不同人类活动的贡献大小。结果表明:20世纪80年代以来,漳卫南运河流域的景观生态健康呈现持续下降趋势;气候变化以及人类活动对流域景观生态健康演变的贡献大小分别为13.95%和86.05%;不同人类活动中水资源开发利用、水土保持和城镇化对流域景观生态健康演变的贡献大小分为-34.89%、25.72%以及-37.19%。

Analysis of watershed landscape ecological health evolution and contribution of driving factors

In terms of the landscape pattern, this study made an assessment of the landscape ecological health of the Zhangweinan River Basin in three eras (the 1980s, 1990s, and 2000s). This study identified the impact of climate change and human activities on the basis of analysis of the evolution trends of watershed landscape ecological health and also quantitatively determined the contribution of different human activities. The results show that, since the 1980s, the landscape ecological health of the Zhangweinan River Basin has presented a worsening trend. The contributions that climate change and human activities made to the evolution of the landscape ecological health are 13.95% and 86.05%, respectively. As driving factors of human activities, urbanization and the utilization of water resources have negative effects on watershed landscape ecological health evolution, with contribution rates of -37.19% and -34.89%, respectively, while soil and water conservation has positive effects on watershed landscape ecological health evolution, with a contribution rate of 25.72%.