县域尺度水土流失抽样监测技术研究

发布时间：2018-03-16 02:33

本文选题：县域　切入点：水土流失　出处：《中国农村水利水电》2017年09期 　论文类型：期刊论文

【摘要】：受自然因素和人为因素的共同作用,区域水土流失分布呈现空间异质性。选择济源市作为研究范围,根据区域受人为活动干扰、发生水土流失的容易程度,划分水土流失易发区和水土流失易变区。在易发区和易变区划定的基础上,以异质性最小单元为样本,设定4种抽样方案,研究分析了通过抽样单元监测数据推算区域数据、区域数据推算县域尺度数据的精度和可行性。结果表明,通过抽样单元监测数据推算县域尺度水土流失数据的方法是可行的;基于易变区优化异质性最小单元抽样方案的各类精度、拟合精度均高于其他抽样方案,符合县域尺度水土流失监测的精度要求。
[Abstract]:The distribution of regional soil and water loss presents spatial heterogeneity due to the interaction of natural and human factors. Jiyuan City is chosen as the research scope. On the basis of the delineation of the susceptible area and the variable area, four sampling schemes were set up with the minimum heterogeneity unit as the sample, and the regional data were calculated through the monitoring data of the sampling unit. The accuracy and feasibility of calculating county scale data by regional data show that it is feasible to calculate county scale soil and water loss data by sampling unit monitoring data. The fitting accuracy of the minimum unit sampling scheme based on heterogeneity is higher than that of other sampling schemes, which is in line with the precision requirement of soil erosion monitoring at county scale.
【作者单位】：河南省水土保持监督监测总站;河南省水利勘测有限公司;
【分类号】：S157

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