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Waterscape, State and Situation of China’s Water Resources
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作者 Kwabena Agyarko Sarpong Wanzhen Xu +3 位作者 Julius Mensah-Akoto James Kortey Neequaye adelaide angela dadzie Obeng Frimpong 《Journal of Geoscience and Environment Protection》 2020年第10期26-51,共26页
Water is one of the most critical issues of concern in China’s ongoing rapid economic development. The resource is scarce and demand is growing as China becomes more industrialized and urbanized. The situation is exa... Water is one of the most critical issues of concern in China’s ongoing rapid economic development. The resource is scarce and demand is growing as China becomes more industrialized and urbanized. The situation is exacerbated by natural and anthropogenic events such as climate change, pollution, exorbitant patterns of water consumption, and an uneven distribution of water resources, with devastating impacts on ecosystems, international relations, food security and public health. In this paper, an overview of China’s water resources is presented. Studies on distribution, consumption patterns and pollution of water resources are reviewed in order to understand the over-exploited and unexplored dimensions of the Chinese water landscape. The status of water resources is also studied with an intention of providing information on the dynamics of water quality and quantity. The paper concludes with a discussion on China’s commitment to rebalancing its water growth model and the measures taken to achieve that. 展开更多
关键词 China Water Consumption Climate Change POLLUTION POPULATION
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镇江市古运河和金山湖河湖上覆水体和沉积物氮及有机质分布特征及污染评价 被引量:6
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作者 原璐彬 邢书语 +2 位作者 刘鑫 周晓红 adelaide angela dadzie 《环境科学》 EI CAS CSCD 北大核心 2021年第7期3186-3197,共12页
镇江市位于长江和京杭大运河"十字黄金水道"的交汇处,是我国历史上最为重要的水上交通枢纽之一,区域内水量充沛、河网密布.近年来,该区域水环境存在不同程度的退化,故调查镇江市主要河湖水体及沉积物污染现状,将为当地水环境... 镇江市位于长江和京杭大运河"十字黄金水道"的交汇处,是我国历史上最为重要的水上交通枢纽之一,区域内水量充沛、河网密布.近年来,该区域水环境存在不同程度的退化,故调查镇江市主要河湖水体及沉积物污染现状,将为当地水环境质量的改善提供重要的基础数据.基于此,本研究选择镇江市典型河湖水体共21个点位(金山湖10个点位,古运河及其支流共11个点位),在冬夏两季采集上覆水及沉积物样品测定其理化指标和氮素含量,并通过有机指数及有机氮对沉积物污染程度进行评价.结果表明:(1)上覆水总氮(TN)浓度在冬夏季节分别介于1.95~15.71 mg·L^(-1)和0.64~12.09 mg·L^(-1)之间,平均值为4.01 mg·L^(-1)和4.07 mg·L^(-1),平均值浓度高于地表水Ⅴ类标准.上覆水氨氮(NH^(+)_(4)-N)浓度在季节上均表现为冬季<夏季,空间上则表现为河流>湖泊;(2)沉积物TN含量在冬夏两季分别介于394.61~3288.09 mg·kg^(-1)和869.21~3598.04mg·kg^(-1)之间,平均值为1928.58 mg·kg^(-1)和2068.40 mg·kg^(-1).湖泊沉积物TN、NH^(+)_(4)-N、硝态氮(NO^(-)_(3)-N)和有机氮(Org-N)含量均表现为冬季>夏季,而河流沉积物TN平均含量为冬季<夏季,NH^(+)_(4)-N和NO^(-)_(3)-N则表现为冬季>夏季,表明河流沉积物在季节上的分布规律更为复杂;空间上,冬夏两季沉积物NO^(-)_(3)-N表现为湖泊>河流,NH^(+)_(4)-N含量则表现为湖泊<河流.C/N结果表明研究区域沉积物有机质主要来源于内源污染;(3)湖泊和河流沉积物超过60%点位属于有机氮污染Ⅳ水平,即存在有机氮污染,而超过70%和54.55%的湖泊和河流沉积物处于有机指数Ⅱ类水平,即较清洁水平,表明镇江市河湖沉积物主要为氮素污染.以上研究结果将为镇江市河流水体及沉积物氮素控制提供重要的基础数据. 展开更多
关键词 季节 空间 有机指数 有机氮 金山湖 古运河及支流
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