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首页> 外文期刊>The Open Environmental Engineering Journal >Modelling the Impact of Land Use Changes on Sediment Loading IntoLake Victoria Using SWAT Model: A Case of Simiyu Catchment Tanzania
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Modelling the Impact of Land Use Changes on Sediment Loading IntoLake Victoria Using SWAT Model: A Case of Simiyu Catchment Tanzania

机译:利用SWAT模型模拟土地利用变化对维多利亚湖沉积物的影响:坦桑尼亚Simiyu流域的案例

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This study aimed at characterising the land use in the Simiyu catchment of Lake Victoria and using land-usesof 1975 and 2006 and comparing the relative impact of land-use change on sediment loading into the Lake. Remote sensingusing the package ILIWIS 3.0. was used to identify and characterize the land-use while Soil and Water AssessmentTool (SWAT) was used to quantify sediment loading from the 1975 and 2006 land-use scenarios. The results of this studyindicate that there was an expansion of agricultural land from 19.33% to 73.43% of the catchment at an annual change rateof 2.9%. Furthermore, the land-use of 1975-yielded less sediment loading compared to that of 2006. Model simulation atthe catchment outlet for sediment reported a total yield of 98,467 tons/yr while the actual measured sediment loading hadthe value of 2,075,114 tons/yr. Hence, the model underestimated sediment yield in the catchment. With good model performance,developing management plans to control sediment loading into Lake Victoria can be achieved using the SWAT model.
机译:这项研究旨在表征维多利亚湖西米尤流域的土地利用,并利用1975年和2006年的土地利用,并比较土地利用变化对沉积物入湖的相对影响。使用软件包ILIWIS 3.0进行遥感。 “土壤和水评估工具”(SWAT)用于量化1975年和2006年土地利用情景中的泥沙负荷,用于识别和表征土地利用。这项研究的结果表明,耕地面积从集水区的19.33%扩大到73.43%,年变化率为2.9%。此外,与2006年相比,1975年的土地使用产生了较少的泥沙负荷。在沉积物集水口的模型模拟报告的总产量为98,467吨/年,而实际测得的泥沙负荷值为2,075,114吨/年。因此,该模型低估了流域的泥沙产量。凭借良好的模型性能,可以使用SWAT模型来制定控制沉积物到维多利亚湖的管理计划。

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