摘要
在预调查的基础上,运用分层抽样技术,计算出了在既定可靠性下,西南铁路陕西段路基边坡监测样点的样本容量。路基边坡植被盖度在90%可靠性和92%的估计精度下估计值和误差限分别为15.81%和1.20%;土壤侵蚀强度在90%可靠性和90.52%的估计精度下估计值和误差限分别为1715.14t/km2和162.60t/km2。
Based on preceding investigation, the monitored sample numbers on the slope of Shaanxi section on Xi'an-Nanjing railway are calculated under given reliability. Under 90% reliability and 92% estimation precision, the mean vegetation coverage and its error value is 15.81% and 1.2%, respectively. The mean soil erosion intensity and its error value are 1715.14 t/km^2 and 162.595 t/km^2 respectively under 90% reliability and 90.52% estimation precision.
出处
《水土保持通报》
CSCD
北大核心
2004年第3期37-39,共3页
Bulletin of Soil and Water Conservation
基金
陕西省水土保持与生态环境监测中心资助项目"开发建设项目水土流失监测抽样技术的研究"内容(smswc200301)
关键词
路基边坡
水土流失监测
分层抽样法
样本数
slope of railway
soil and water loss monitor
streaming sampling
numbers of sampling
