近60年来政策因素对民勤生态环境变化的影响

Impacts of polices on eco-environment of Minqin county during the past 60 years

在全球气候变化大背景下,人类活动的干扰加剧了区域生态环境变化,而人类活动受政策的影响显著。文中结合历史文献资料、遥感监测数据、水文、植被、风沙活动以及社会经济数据,运用统计分析方法阐明近60年来民勤生态环境的变化特征,并从政策角度分析其变化的内在驱动力。结果表明:民勤生态环境经历了由好转坏再向良性发展的过程。生态环境变化的转折点主要在1980年、2000年以及2007年前后。分析表明,这种变化过程受建国初期的"以粮为纲"政策、1978年的改革开放政策以及2000年左右的生态保护政策影响较为明显。

On the background of global climate change, human activities that mainly caused by polices exacerbated the regional ecoenvironment change. In this paper, we combined the historical documents, remote sensing, hydrology, vegetation and socioeconomic data, applied statistical analysis to clarify the characteristics of the eco - environment change of Minqin during the past 60 years, then analyzed the internal driving force from the perspective of policy. The results show that eco - environment of Minqin experienced the process of good to bad and turned to good again. The turning points were mainly around 1980, 2000 and 2007. These changes were closely related to the implementation of ＂Food Program＂, ＂Reform and Opening＂ and ＂Ecological Protections＂ policies.