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| 分层抽样法在退耕还林工程水土流失监测中的应用 | |
| 引用本文： | 向小芹,宋西德,施志宝,李巧芹. 分层抽样法在退耕还林工程水土流失监测中的应用[J]. 陕西林业科技, 2006, 0(2): 9-11 |
| 作者姓名： | 向小芹 宋西德 施志宝 李巧芹 |
| 作者单位： | 1. 西北农林科技大学林学院,陕西,杨凌,712100;陕西省富县退耕办,陕西省,富县,727500 2. 西北农林科技大学林学院,陕西,杨凌,712100 3. 陕西治沙研究所,陕西,榆林,719000 4. 延安桥北林业局,陕西,富县,727500 |
| 基金项目： | 黄土高原渭北生态经济型防护林体系优化模式建设技术推广：2001EC0003222 |
| 摘 要： | 在预调查的基础上,运用分层抽样技术,计算出了既定可靠性下,退耕还林工程(陕西富县2002年)造林地监测样点的样本容量。在90％可靠性和92％的估计精度下,退耕还林造林地植被盖度估计值和误差限分别为15．81％和1．2％;在90％可靠性和90．52％的估计精度下,土壤侵蚀强度估计值和误差限分别为1715．14 t／km2和162．595 t／km2。 |
| 关 键 词： | 退耕还林 水土流失 分层抽样 监测 |
| 文章编号： | 1001-2117（2006）02-0009-03 |
| 收稿时间： | 2006-01-15 |
| 修稿时间： | 2006-01-15 |
Application of Stratified Sampling Method to the Monitoring of Soil and Water Erosion in the Land Conversion to Forest Program |
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| XIANG Xiao-qin,SONG Xi-de,SHI Zhi-bao,LI Qiao-qin. Application of Stratified Sampling Method to the Monitoring of Soil and Water Erosion in the Land Conversion to Forest Program[J]. Shaanxi Forest Science and Technology, 2006, 0(2): 9-11 | |
| Authors: | XIANG Xiao-qin SONG Xi-de SHI Zhi-bao LI Qiao-qin |
| Abstract: | On the basis of pre-investigation, stratified sampling was applied to determining the quantity of sampling for monitoring at expected reliability for the land conversion to forest program (Fu County). Given reliability at 90% and estimation precision at 92%, estimation value of the vegetation coverage was 15. 81% with its estimation error at 1. 2%. Given the reliability at 90% and estimation precision at 90. 52%, the estimation of soil erosion intensity was 1715. 14 t/km2, with its estimation error at 162. 595 t/km2. |
| Keywords: | Land conversion to forest soil and water erosion stratified sampling monitoring |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |