【摘要】 采用生态安全综合指数和层次分析法,从生态环境、人文环境、环境污染压力和保护等方面建立生态脆弱区榆林市的生态安全评价体系,综合评价榆林市10年来的生态安全变化趋势及地域差别。结果表明:近年来,榆林市生态安全状况一直处于预警状态但有一定的波动性,个别区域甚至恶化;生态环境虽然有所改善,但情况仍然严重。文章最后为改善生态环境现状提出了5条政策建议。更多还原

【Abstract】 By using the method of analyzing the comprehensive index and level of the ecological security,the evaluative system of ecological security is established to evaluate the changing tendency of ecological security from the ecological environment,social environment,environmental press of pollution and preventing environment in the ecologically fragile area in Yulin in the past ten years.The results show that ecological security in Yulin is in previous warning states on the time,but there is some volatility,especial in some area;although ecological environment is becoming better,the problems are also serious.At last,the reason is analyzed and advices for improving ecological environment are given.更多还原