不同土地利用模式下洪泽湖流域非点源颗粒态磷负荷时空演变研究

发布时间：2018-05-02 12:29

本文选题：土地利用 + 非点源污染　；参考：《长江流域资源与环境》2017年04期

【摘要】：综合星地协同技术手段,定量化表征1990年以来洪泽湖流域非点源颗粒态磷负荷的时空变化特征,并差别化地探讨其与流域土地利用变化的响应关系,厘清二者的作用机制,为实现非点源磷污染的有效管控提供科技支撑。主要结论包括:(1)近20年,颗粒态磷负荷呈现"下降-上升-下降"的波动状态,1990~1996年呈下降趋势,1998~2006年保持平稳增长状态,2008年后快速下降;(2)颗粒态磷单位负荷空间差异明显,高值区集中分布在淮河支流流域(3.88 t/km~2/a),低值区则主要分布在汴河流域(0.57 t/km~2/a);(3)不同土地利用模式下平均颗粒态磷负荷由高到低依次为:多种地类混合的淮河支流流域(681.84 t/a)、城镇化快速增长的高松河流域(317.65 t/a)、农用地主导的维桥河流域(185.73 t/a)、湿地保护区的汴河流域(121.09 t/a)。林地、湿地等用地类型能显著减少颗粒态磷污染物的流失量,农用地和建设用地则会加剧颗粒态面源磷污染。
[Abstract]:The space-time variation characteristics of non-point source particulate phosphorus load in Hongze Lake basin since 1990 are quantitatively characterized by means of satellite and earth cooperative technology, and the response relationship between them and land use change in the basin is discussed in a differential way, and the mechanism of their action is clarified. To provide scientific and technological support for the effective control of non-point source phosphorus pollution. The main conclusions are as follows: (1) in the last 20 years, the particulate phosphorus load shows a downward trend from 1990 to 1996 and maintains a steady increase from 1990 to 1996, and a rapid decline after 2008) the spatial difference of the granular phosphorus unit load is obvious. The high value area is concentrated in the Huaihe River tributary basin, and the low value area is mainly distributed in the Bianhe River basin, 0.57 t / kg / 2 / a ~ (3) the average particulate phosphorus load varies from high to low under different land use models: the Huaihe River tributary basin with mixed land species 681.84. T / A, 317.65 t / a, 185.73 t / a, 121.09 t / a / a, respectively, in the rapidly urbanized Gaosong River basin, in the Weiqiao River basin dominated by agricultural land, and in the Bianhe River basin in wetland reserve. Land types such as woodland and wetland can significantly reduce the loss of particulate phosphorus pollutants, while agricultural land and construction land will aggravate the particulate non-point source phosphorus pollution.
【作者单位】：河南大学黄河文明与可持续发展研究中心暨黄河文明传承与现代文明建设河南省协同创新中心;中国科学院流域地理学重点实验室中国科学院南京地理与湖泊研究所;国土资源部海岸带开发与保护重点实验室;南京信息工程大学地理与遥感学院;
【基金】：国家自然科学基金(41671284) 国土资源部海岸带开发与保护重点实验室开放基金项目(2015CZEPK01)~~
【分类号】：X52

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