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首页> 外文期刊>International Soil and Water Conservation Research >Calculation of reservoir capacity loss due to sediment deposition in the `Muela reservoir, Northern Lesotho
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Calculation of reservoir capacity loss due to sediment deposition in the `Muela reservoir, Northern Lesotho

机译：莱索托北部穆拉水库因沉积物沉积而导致的水库容量损失的计算

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Abstract Bathymetry survey records of the `Muela Reservoir in northern Lesotho were obtained from the Lesotho Highlands Development Authority (LHDA) with the aim of identifying reservoir storage capacity loss due to sediment deposition, between 1985 and 2015. For this purpose, data from eight surveys completed between 1985 and January 2015 were analyzed to quantify bathymetric change between each survey. Four interpolation methods (inverse distance weighting, Kriging, natural neighbor, and spline), were used to create digital terrain models from each survey data-set. In addition, a triangulated irregular network (TIN) surface was created from each data-set. The average reservoir storage capacity loss of 15,400 m3/year was determined across the whole period between 1985 and early 2015, based on Kriging. Whilst the results indicate high inter-annual variability in the rate of reservoir capacity reduction, consideration of errors in the surveying and reservoir volumetric calculation methods suggest that rates of reservoir volume reduction can vary between 11,400 m3/year and 18,200 m3/year.
机译：摘要莱索托高原开发局（LHDA）获得了莱索托北部穆拉水库的测深记录，目的是确定1985年至2015年之间由于沉积物沉积造成的水库储存能力损失。为此，从八次调查中获得数据对1985年至2015年1月之间完成的测深进行了分析，以量化每次调查之间的测深变化。四种插值方法（反距离权重，Kriging，自然邻域和样条线）用于根据每个调查数据集创建数字地形模型。此外，从每个数据集创建了一个三角不规则网络（TIN）表面。根据克里格（Kriging），在1985年至2015年初的整个时期内，平均水库储水能力损失为15,400立方米/年。虽然结果表明水库容量减少率的年际变化很大，但考虑到勘测和水库容积计算方法的错误，表明水库容积减少率的变化范围为11,400立方米/年至18,200立方米/年。

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