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Assessment of Sediment and Pollutants in Buyo Lake,Ivory Coast,Using SWAT (Soil and Water Assessment Tool) Model 总被引:2,自引:0,他引:2
Tanoh Jean-Jacques Koua Jean Patrice Jourda Kan Jean Kouame Kouao Armand Anoh 《化学与化工:英文版》2013,(11):1054-1059
The changes in land use in the last 30 years in the territory of agro-forest watershed of Lake Buyo resulted in significant sediment into the lake. Sediments are a preferred means of transportation for certain pollutants, like phosphorus in excess. By mapping the source areas of erosion, the authors can determine the risk areas and help to prioritize interventions in the territory. This mapping is done using the SWAT (soil and water assessment tool) model. Several types of data, including topography, land use, soil and climate data are needed to run the model. In this paper, all different steps are presented, from the designing of HRU (hydrological response units), basic units to run the SWAT model until the simulations. The establishment of HRU has three main stages: space discretization, land use and soil data integration and HRU distribution: (1) space discretization which consist in extracting the limits and the water network of the watershed from the DEM (digital elevation model) and in subdividing them into sub-basins; (2) land use and soil data integration: it consists in digitizing the physical maps of land use and of soils under Mapinfo 7.5 and in keeping them in "shape" format; (3) HRU distribution: it leads to subdivide the sub-watersheds in small units that combine a single soil type and one type of land use. It appears from this study to obtain 23 sub-watersheds and 71 HRU. Once the HRU designed, it is necessary to integrate climate data, data on physico-chemical characteristics of soils and agricultural practices, before starting the simulations. This will allow the model to assess the risk of sedimentation and eutrophication of the lake using the MUSLE (modified universal soil loss equation) and phosphorus cycle. 相似文献
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<正>科特迪瓦(象牙海岸)共和国,位于非洲西部, 南濒几内亚湾。阿比让市系该国第一大海港和政治、经济中心及交通枢纽,且系西非地区的经济中心。阿比让市的主要工业有石油加工、食品、纺织、化工、金属加工、木材加工和汽车装配等。阿比让市的交通运输协会(Societe des Transports Abid- janais,简称Sotra,下同)系一个具有460万欧元的公私合资公司,配备了约600辆公共汽车和21艘轮船,为阿比让这一拥有360万人口的特大城市提供公共交通服务。 相似文献
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7月中旬.福建港兴集团“奇客”牌茶饼干20多个品种.通过厦门口岸远销非洲科特迪瓦(象牙海岸)、巴布亚新几内亚、美国和韩国等国家,首批出口总价值147191美元。 相似文献
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据象牙海岸天然橡胶协会统计:2010年,象牙海岸天然橡胶产量22.7万t,同比增长逾10%,并且超过了最初预估的21.8万t;天然橡胶出口量同比增氐8.3%。预计2011年该国天然橡胶产量同比将增长5%,达到23.8万t。 相似文献
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