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王颖 《中国环境管理干部学院学报》2007,17(4):51-53
我院校园绿化存在规划不足、养护不够等问题。我院应该体现生态环保的特点,统一规划,加强特色,强调生态效益,建设体现环保特色的生态绿化校园。 相似文献
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为全面分析不合理绿化导致的行车安全问题,研究了平曲线内侧绿化对行车视距的影响,中央分隔带绿化植物株距和高度对防眩、横向通视、植物存活率等的影响,大冠径常绿类植物对道路净空、驾驶员心理的影响,绿化遮挡交通标志或高速公路出入口对行车产生的误导现象,立交匝道及其出入口绿化对行车诱导、出口缓冲和入口通视的影响,以及隧道出入口绿化对眼睛明暗适应性的影响.提出平曲线内侧的植物冠径和冠高控制措施,并根据防眩要求从几何上确定计算中央分隔带植物的株距、高度的方法,最后探讨了对隧道出入口和立交匝道不同位置绿化安全性的强化措施.研究表明,绿化可从多方面对高速公路行车安全产生影响. 相似文献
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Xiaohua Wei Ge Sun Shirong Liu Hong Jiang Guoyi Zhou Limin Dai 《Journal of the American Water Resources Association》2008,44(5):1076-1085
Abstract: The relationship between forests and streamflows has long been an important research interest in China. The purpose of this paper is to summarize progress and lessons learned from the forest‐streamflow studies over the past four decades in China. To better measure the research gaps between China and other parts of the world, a brief global review on the findings from paired watershed studies over the past 100 years was also provided. In China, forest management shifted in the later 1990s from timber harvesting to forest restoration. Forest‐streamflow research was accordingly changed from assessing harvesting impacts to evaluating both harvesting and forestation effects. Over the past four decades, Chinese forest hydrology research has grown substantially. Significant progress has been made on measuring individual processes, but little solid, long‐term data were available to assess the relationship between forest changes and streamflows because of an absence of standard paired watersheds. In addition, misuse of statistical analyses was often found in the literature. A unique opportunity exists in China to study the forestation effects on streamflow as several large‐scale forestation programs are being implemented. Such an opportunity should include a robust paired watershed design under an integrated watershed ecosystem framework to avoid repeating the lessons already learned. Recommendations on future forest‐streamflow research directions in China are provided. 相似文献
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