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河流泥沙来量的计算是工程水文计算的一个重要组成部分。有水文站观测资料的地方，输沙量的计算比较容易。而对于没有水文站分布或观测资料不足的边远地区，用常规方法无法计算出输沙量。本文以马拉水库涉及到的龙马河流域和涅鲁藏布河流域为工作区，在分析输沙量主要受土壤侵蚀因素影响的基础上，从土壤侵蚀遥感调查入手，参照全国土壤侵蚀遥感调查细则中规定的有关定量化指标，分析并试算了土壤侵蚀模数。通过与临近水文站观测资料的符合，最终确定了一组土壤侵蚀模数，进一步算出该区的年输沙量，满足了水库规划工作中工程水文计算的需要。
Calculation of the amount of river sediment is an important part of engineering hydrology calculation. Where hydrological station observations are available, it is easier to calculate sediment load. For outlying areas where there is no hydrological station distribution or lack of observational data, sediment discharge can not be calculated by conventional methods. Based on the analysis of sediment transport mainly affected by soil erosion, the paper starts from the remote sensing survey of soil erosion, according to the national soil erosion remote sensing survey Detailed rules on the quantitative indicators, analysis and trial calculation of soil erosion modulus. Finally, a set of soil erosion modulus was determined according to the observed data of the adjacent hydrological station, and the annual sediment discharge in this area was further calculated to meet the hydrological calculation requirements of the reservoir.