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文摘
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在大量说实资料和调查基础上，论述了呼伦湖富营养化状况，找出了该湖富营养化的影响因素，以及其较强自净功能的成因，呼伦湖地处内陆区高纬度，半干旱气候地区，属牧业污染型，氮入湖量主要来源于点源污染（河流的输入），磷人湖量面源（主要是降尘）大于点源。经多年观测发现，氨和磷的变化并不明显，反映出湖体有较强的自净功能，这是和湖体特殊的地理位置分不开的：（1）该湖系构造湖与河沟通的吞吐湖，面积大，水较深，使得湖体自净功能显著；（2）地处高纬度，半干旱地区，气温低，对湖体浮游生物有一定的抑制作用；（3）湖体构造特殊，露出30余个泉点，有大量地下水的补给，呼伦湖是一个较大的水体与其周围湿地构成的淡水湖泊生态系统，在维持生态多样性和丰富的生态资料方面发挥巨大作用，且在明显的调蓄洪水的功能，在区域环境保护中具有特殊的地位。 |
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其他语种文摘
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Based on a vast amount of full and accurate data and investigations, this paper dis cussed the eutrophication state of Hulun Lake and found out key factors influencing eutrophication and causes of relative strong self-purification function of the lake. Hulun Lake is the fifth largest lake in the semi-arid continental climate region of high latitude in China. It belongs to animal husbandry pollution. The nitrogen input to Hulun Lake mainly comes from polluted point sources (the rivers), while phosphorus input from area source is more than that from point sources. Through many years observatuions, it is found out that the changes in nitrogen and phosphorus contents are not obvious, indicating the existence of a strong self-purification function of Hulun Lake. The self-purification function of Hulun Lake is related to its special geographical position. First, Hulun Lake is an alternately inflow-outflow lake linking tectonic lake and rivers with vast area and deep water. All of these contributed to the self-purification function of the lake. Second, the activity of planktons in the lake is restrained by the higher latitude, semi-arid climate and low temperature. Third, the structure of the lake is special with over 30 mouths of springs and sufficient replenishment of underground water to the lake. Hulun Lake is a freshwater lake ecosystem consisting of a relative large water body and its surrounding wetlands. It not only places an important role in keeping biodiversity and enriching biological resources, but also functions obviously in adjusting and impounding floods. Considering its ecological and social benefits, Hulun Lake is indispensable to the development of community and industry, agriculture and animal husbandry. All of these showed that Hulun Lake bears an important position in the regional environmental conservation. |
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来源
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自然资源学报
,2002,17(6):684-690 【核心库】
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关键词
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呼伦湖
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区域环境保护
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湖泊富营养化
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自净功能
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综合治理
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水量平衡
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水质评价
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地址
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内蒙古大学生命科学学院生态与环境科学系, 内蒙古, 呼和浩特, 010021
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-3037 |
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学科
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环境保护管理 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:1122283
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