Water environmental planning and management has become essential for guiding the water pollution control activities.Past water pollution control activities have been site specific,with little thought on water quality ...Water environmental planning and management has become essential for guiding the water pollution control activities.Past water pollution control activities have been site specific,with little thought on water quality standard reaching at the watershed scale.Based on the watershed approach,a seven-step methodological framework for water environmental planning and management was developed.The framework was applied to water environmental planning and management of the Lake Qilu watershed in Yunnan Province,China.Results show that the reduction amount of total nitrogen(TN)under the plan is 1,205 tons per year so that the target of environmental capacity can be reached in 2020.Compared with traditional methods,the framework has its prevalence and could be generalized to analogous watersheds.展开更多
对农村面源污染物负荷的估算、来源分析及控制措施制定是当前研究的热点之一。利用输出系数模型和生态系统服务与权衡综合评价模型(Integrate valuation of ecosystem services and tradeoffs tool,InVEST模型)估算宝兴县面源污染物总氮...对农村面源污染物负荷的估算、来源分析及控制措施制定是当前研究的热点之一。利用输出系数模型和生态系统服务与权衡综合评价模型(Integrate valuation of ecosystem services and tradeoffs tool,InVEST模型)估算宝兴县面源污染物总氮(TN)、总磷(TP)负荷,并结合水环境功能分区标准,分析面源污染物的超标情况。旨在揭示山区农村面源污染治理的空间异质性,为农村面源污染防治规划、山区水环境治理效率的提升提供科学依据。结果表明,1)2010年宝兴县面源污染物TN、TP负荷分别为1156.44、81.41t/a,TN、TP负荷的空间格局整体上呈现出分布不均,局部集中,靠近水体的规律;2)不同污染源对TN、TP负荷的贡献率大小顺序均为:畜禽养殖>农业用地>农村生活;3)从流域尺度看,宝兴县TN、TP负荷没有超过III类水质标准规定的污染物负荷阈值;而从30m×30m栅格尺度看,宝兴县TN、TP超标量分别为763.63、51.16t/a,其超标区域主要集中在耕地、草地、居民地以及靠近水体的地方,以上超标区域即为面源污染控制和治理的关键区域。展开更多
文摘Water environmental planning and management has become essential for guiding the water pollution control activities.Past water pollution control activities have been site specific,with little thought on water quality standard reaching at the watershed scale.Based on the watershed approach,a seven-step methodological framework for water environmental planning and management was developed.The framework was applied to water environmental planning and management of the Lake Qilu watershed in Yunnan Province,China.Results show that the reduction amount of total nitrogen(TN)under the plan is 1,205 tons per year so that the target of environmental capacity can be reached in 2020.Compared with traditional methods,the framework has its prevalence and could be generalized to analogous watersheds.
文摘对农村面源污染物负荷的估算、来源分析及控制措施制定是当前研究的热点之一。利用输出系数模型和生态系统服务与权衡综合评价模型(Integrate valuation of ecosystem services and tradeoffs tool,InVEST模型)估算宝兴县面源污染物总氮(TN)、总磷(TP)负荷,并结合水环境功能分区标准,分析面源污染物的超标情况。旨在揭示山区农村面源污染治理的空间异质性,为农村面源污染防治规划、山区水环境治理效率的提升提供科学依据。结果表明,1)2010年宝兴县面源污染物TN、TP负荷分别为1156.44、81.41t/a,TN、TP负荷的空间格局整体上呈现出分布不均,局部集中,靠近水体的规律;2)不同污染源对TN、TP负荷的贡献率大小顺序均为:畜禽养殖>农业用地>农村生活;3)从流域尺度看,宝兴县TN、TP负荷没有超过III类水质标准规定的污染物负荷阈值;而从30m×30m栅格尺度看,宝兴县TN、TP超标量分别为763.63、51.16t/a,其超标区域主要集中在耕地、草地、居民地以及靠近水体的地方,以上超标区域即为面源污染控制和治理的关键区域。
