摘要
根据长期水土流失实验观测经历,通过一系列实验,探讨称重法、比重计法测算泥沙含量的适用性。结果显示,称重法器材要求低、便携、操作简单、效率高、且精度较高,非专业技术人员易掌握。比重计法器材要求低、便携、操作简便、效率高,且免去了取样环节,但精度较差,非专业技术人员掌握稍有困难。当试验条件确实存在困难或宏观研究对数据精度要求不高时,特别是生产建设项目水土保持监测,称重法和比重计法具有较好的适用性,且称重法较比重计法适用性更好。另外,泥沙密度取值不同对测算结果影响较小,一般可取2.7g/cm3。
The applicability of measuring sediment content with weighing method and hydrometer method was discussed, based on the long experience of soil erosion experiment observation and a series of experiments. Results showed that weighing method had the characteristics： Low equipment requirements, portable, simple to operate, high efficiency, easy master to the non-professional technician, and hydrometer method had the characteristics： Low equipment requirements, portable, simple to operate, high efficiency, no sampling, low precision, hard to master to the non-professional technician. Both weighing method and hydrometer method could be taken when the experiment condition was difficult or the macro examination had low precision to data, especially in soil and water conservation monitoring of production and construction projects. Furthermore, weighing method had better applicability than hydrometer method. In addition, there had a little effect on the results for different value of the sediment density, and generally it could be assumed as 2.7 g/cma.
出处
《水土保持学报》
CSCD
北大核心
2014年第1期193-197,共5页
Journal of Soil and Water Conservation
基金
水利部公益性行业科研专项(201201048)
关键词
水土流失
泥沙含量
取样烘干法
称重法
比重计法
water and soil loss
sediment content
sampling drying method
weighing method
hydrometer method
