[目的]以构建广东省东莞市生态网络格局为目标,评估生态廊道重要性以及识别生态廊道夹点、障碍点,确定生态保护修复的关键区域,提出相应生态修复策略,为后续相关国土空间规划与相关专项规划的编制和调整提供科学依据。[方法]基于传统的...[目的]以构建广东省东莞市生态网络格局为目标,评估生态廊道重要性以及识别生态廊道夹点、障碍点,确定生态保护修复的关键区域,提出相应生态修复策略,为后续相关国土空间规划与相关专项规划的编制和调整提供科学依据。[方法]基于传统的“生态源识别—建立阻力面—提取生态廊道”研究思路,加入城市大数据兴趣点(points of interest,POIs),弥补生态源地识别与阻力面构建精度不足的问题,再通过电路理论识别区域生态廊道与生态夹点、障碍点,从而构建东莞市整体生态网络格局。[结果](1)共识别生态源29处,占研究区面积20.45%,主要位于东莞市南部片区;(2)共生成生态廊道74条,其中潜在生态廊道12条,水乡片区以及市域边缘区生态廊道需要重点关注与保护。[结论]东莞市南部生态条件较好,生态源地较为集中,但城市边缘区以及北部水乡片区生态夹点与障碍点较多,需要进行重点生态修复与维护。展开更多
The analysis of the landscape fragmentation in Dongguan could promote the sustainable development of its eco-environment,society and economy.Guided by the theory of landscape ecology,various landscape indices,includin...The analysis of the landscape fragmentation in Dongguan could promote the sustainable development of its eco-environment,society and economy.Guided by the theory of landscape ecology,various landscape indices,including patch number,mean patch area,fragmentation index,fractal dimensions,boundary density,patch density,landscape diversity,landscape dominance and landscape fragmentation were selected to analyze the evolution features of landscape fragmentation in Dongguan.The research results revealed that the construction land kept intruding and assimilating farmland and natural landscape,the landscape patch number of study area was on the increase and the mean patch area reduced fast,so the landscape fragmentation degree of Dongguan was aggravated.After 1995,the land use speed slowed down,which indicated the study area started to focus on holistic development of city after drastic expansion.展开更多
通过对2007—2016年东莞不同片区雷雨大风时空变化和天气类型统计,结果表明:东莞北部最常发生雷雨大风,但局地性强,南部雷雨大风分布均匀,城区和东部山区雷雨大风相对较少;雷雨大风天数整体有波动下降的趋势,并大致有"一年高两年低...通过对2007—2016年东莞不同片区雷雨大风时空变化和天气类型统计,结果表明:东莞北部最常发生雷雨大风,但局地性强,南部雷雨大风分布均匀,城区和东部山区雷雨大风相对较少;雷雨大风天数整体有波动下降的趋势,并大致有"一年高两年低"的起伏变化;雷雨大风主要集中在5—8月,其中6月出现最多,午后和傍晚时段为雷雨大风的高发期;东莞雷雨大风风力以8级风为主,最大阵风为15级;按500 h Pa形势,东莞雷雨大风分为5类:槽前型、东风型、槽后型、高压型和脊后型。展开更多
文摘[目的]以构建广东省东莞市生态网络格局为目标,评估生态廊道重要性以及识别生态廊道夹点、障碍点,确定生态保护修复的关键区域,提出相应生态修复策略,为后续相关国土空间规划与相关专项规划的编制和调整提供科学依据。[方法]基于传统的“生态源识别—建立阻力面—提取生态廊道”研究思路,加入城市大数据兴趣点(points of interest,POIs),弥补生态源地识别与阻力面构建精度不足的问题,再通过电路理论识别区域生态廊道与生态夹点、障碍点,从而构建东莞市整体生态网络格局。[结果](1)共识别生态源29处,占研究区面积20.45%,主要位于东莞市南部片区;(2)共生成生态廊道74条,其中潜在生态廊道12条,水乡片区以及市域边缘区生态廊道需要重点关注与保护。[结论]东莞市南部生态条件较好,生态源地较为集中,但城市边缘区以及北部水乡片区生态夹点与障碍点较多,需要进行重点生态修复与维护。
基金Supported by National Fund of Natural Sciences (40534019)~~
文摘The analysis of the landscape fragmentation in Dongguan could promote the sustainable development of its eco-environment,society and economy.Guided by the theory of landscape ecology,various landscape indices,including patch number,mean patch area,fragmentation index,fractal dimensions,boundary density,patch density,landscape diversity,landscape dominance and landscape fragmentation were selected to analyze the evolution features of landscape fragmentation in Dongguan.The research results revealed that the construction land kept intruding and assimilating farmland and natural landscape,the landscape patch number of study area was on the increase and the mean patch area reduced fast,so the landscape fragmentation degree of Dongguan was aggravated.After 1995,the land use speed slowed down,which indicated the study area started to focus on holistic development of city after drastic expansion.
文摘通过对2007—2016年东莞不同片区雷雨大风时空变化和天气类型统计,结果表明:东莞北部最常发生雷雨大风,但局地性强,南部雷雨大风分布均匀,城区和东部山区雷雨大风相对较少;雷雨大风天数整体有波动下降的趋势,并大致有"一年高两年低"的起伏变化;雷雨大风主要集中在5—8月,其中6月出现最多,午后和傍晚时段为雷雨大风的高发期;东莞雷雨大风风力以8级风为主,最大阵风为15级;按500 h Pa形势,东莞雷雨大风分为5类:槽前型、东风型、槽后型、高压型和脊后型。