依据“生态安全格局-关键区-保护修复策略”思路,以江西省大余县为研究区,识别生态源地、生态“夹点”、障碍点、断裂点和破碎生态空间等关键区数量及空间分布,提出生态保护修复类型区及其相应措施。研究结果表明:(1)大余县生态源地共14...依据“生态安全格局-关键区-保护修复策略”思路,以江西省大余县为研究区,识别生态源地、生态“夹点”、障碍点、断裂点和破碎生态空间等关键区数量及空间分布,提出生态保护修复类型区及其相应措施。研究结果表明:(1)大余县生态源地共147.36 km 2,涉及林地、水域和草地,生态廊道69条,呈现出两横五纵的空间特征。研究识别生态“夹点”12处,生态障碍点13处,生态断裂点23处,破碎生态空间57.46 km 2。(2)生态保护修复类型区包括矿山修复区、山水治理区、农田整治区、农村建设用地整治区和交通用地优化区,建议分别采取矿山复绿、山体治理和水污染防控、农用地整理和耕地污染防控、居民点整合和农村道路复垦、建立野生动物通道和沿线植被恢复等策略。(3)基于生态安全格局构建,从区域整体视角识别生态保护修复关键区,依据关键区所覆盖土地利用类型划分生态保护修复类型区,并以此为基础提出系统性的保护修复策略。研究结果有助于资源枯竭型城市生态系统从关键点、线、面的修复工程向山水林田湖草系统修复推进。展开更多
[Objective] The study aimed to discuss the application of a stereo constructed wetland to the treatment of slightly polluted source water. [Method] In this study, a new stereo constructed wetland mode was put forward,...[Objective] The study aimed to discuss the application of a stereo constructed wetland to the treatment of slightly polluted source water. [Method] In this study, a new stereo constructed wetland mode was put forward, and a pilot project of water ecological purification in Xinsheng River, the diversion channel of Shijiuyang Waterwork in Jiaxing City, were analyzed. Afterwards, the impact factors of water purification by the technology were discussed from water quality and quantity, season and climate, species configuration, management and maintenance. [Result] Under three different hydraulic loading conditions, the pilot project effectively improved water SD and DO level, and reduced SS, CODCr, NH3-N, TN and TP significantly in summer and autumn, so that effluent water quality reached surface water standard at Grade III. [Conclusion] The stereo constructed wetland mode composed of constructed wetland and underwater forest used to treat slightly polluted source water is feasible and has a good promotion prospect.展开更多
[目的]对新疆阿克苏地区生态源地进行识别,为该地区生态安全格局构建和可持续的国土空间生态修复提供策略与建议。[方法]以新疆阿克苏地区为例,采用定性(生态保护红线直接识别法)和定量(基于InVEST模型的综合评估法)方法识别生态源地,...[目的]对新疆阿克苏地区生态源地进行识别,为该地区生态安全格局构建和可持续的国土空间生态修复提供策略与建议。[方法]以新疆阿克苏地区为例,采用定性(生态保护红线直接识别法)和定量(基于InVEST模型的综合评估法)方法识别生态源地,并在此基础上,比较两种结果之间的差异及其原因,判定目前划定的生态保护红线能否体现人类对生态系统服务需求。[结果]①基于InVEST模型的综合评估法识别的生态源地面积为11433.6 km 2,占研究区总面积的8.9%,主要分布于区内河流及其周边区域;基于生态保护红线直接识别的生态源地面积为22746.8 km 2,占研究区总面积的17.7%,主要分布于天山南麓和区内河流周边区域;②两种方法界定的生态源地在空间分布在上存在着较大差异。综合评估法界定的生态源地中有59.4%不在生态保护红线内,面积为6787.0 km 2。③导致两种结果差异的主要原因在于生态保护红线侧重于对生态用地本身生态功能的保护,而生态源地的概念结合了人的需求,更侧重于各类生态系统为人类生产生活提供的服务。[结论]未来的工作中,需要考虑如何将侧重满足社会需求的生态源地与侧重生态环境保护的生态红线相统一,应选择以定量识别生态源地为主,以定性识别生态源地为辅,综合划定生态源区,并提出潜在的规划和政策建议,以实现社会经济和自然环境的协调发展。展开更多
文摘依据“生态安全格局-关键区-保护修复策略”思路,以江西省大余县为研究区,识别生态源地、生态“夹点”、障碍点、断裂点和破碎生态空间等关键区数量及空间分布,提出生态保护修复类型区及其相应措施。研究结果表明:(1)大余县生态源地共147.36 km 2,涉及林地、水域和草地,生态廊道69条,呈现出两横五纵的空间特征。研究识别生态“夹点”12处,生态障碍点13处,生态断裂点23处,破碎生态空间57.46 km 2。(2)生态保护修复类型区包括矿山修复区、山水治理区、农田整治区、农村建设用地整治区和交通用地优化区,建议分别采取矿山复绿、山体治理和水污染防控、农用地整理和耕地污染防控、居民点整合和农村道路复垦、建立野生动物通道和沿线植被恢复等策略。(3)基于生态安全格局构建,从区域整体视角识别生态保护修复关键区,依据关键区所覆盖土地利用类型划分生态保护修复类型区,并以此为基础提出系统性的保护修复策略。研究结果有助于资源枯竭型城市生态系统从关键点、线、面的修复工程向山水林田湖草系统修复推进。
基金Supported by National Science and Technology Project of Water Pollution Control and Management(2008ZX07421-001)
文摘[Objective] The study aimed to discuss the application of a stereo constructed wetland to the treatment of slightly polluted source water. [Method] In this study, a new stereo constructed wetland mode was put forward, and a pilot project of water ecological purification in Xinsheng River, the diversion channel of Shijiuyang Waterwork in Jiaxing City, were analyzed. Afterwards, the impact factors of water purification by the technology were discussed from water quality and quantity, season and climate, species configuration, management and maintenance. [Result] Under three different hydraulic loading conditions, the pilot project effectively improved water SD and DO level, and reduced SS, CODCr, NH3-N, TN and TP significantly in summer and autumn, so that effluent water quality reached surface water standard at Grade III. [Conclusion] The stereo constructed wetland mode composed of constructed wetland and underwater forest used to treat slightly polluted source water is feasible and has a good promotion prospect.
文摘[目的]对新疆阿克苏地区生态源地进行识别,为该地区生态安全格局构建和可持续的国土空间生态修复提供策略与建议。[方法]以新疆阿克苏地区为例,采用定性(生态保护红线直接识别法)和定量(基于InVEST模型的综合评估法)方法识别生态源地,并在此基础上,比较两种结果之间的差异及其原因,判定目前划定的生态保护红线能否体现人类对生态系统服务需求。[结果]①基于InVEST模型的综合评估法识别的生态源地面积为11433.6 km 2,占研究区总面积的8.9%,主要分布于区内河流及其周边区域;基于生态保护红线直接识别的生态源地面积为22746.8 km 2,占研究区总面积的17.7%,主要分布于天山南麓和区内河流周边区域;②两种方法界定的生态源地在空间分布在上存在着较大差异。综合评估法界定的生态源地中有59.4%不在生态保护红线内,面积为6787.0 km 2。③导致两种结果差异的主要原因在于生态保护红线侧重于对生态用地本身生态功能的保护,而生态源地的概念结合了人的需求,更侧重于各类生态系统为人类生产生活提供的服务。[结论]未来的工作中,需要考虑如何将侧重满足社会需求的生态源地与侧重生态环境保护的生态红线相统一,应选择以定量识别生态源地为主,以定性识别生态源地为辅,综合划定生态源区,并提出潜在的规划和政策建议,以实现社会经济和自然环境的协调发展。
