Cost-effective sampling of Cs-137-derived net soil redistribution: part 1-estimating the spatial mean across scales of variation

doi:10.1016/j.jenvrad.2014.12.007

	Cost-effective sampling of Cs-137-derived net soil redistribution: part 1-estimating the spatial mean across scales of variation
	Li, Y.1; Chappell, A.2; Nyamdavaa, B.1; Yu, H.1; Davaasuren, D.1; Zoljargal, K.1
刊名	JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
	2015
卷号	141 页码:97-105
关键词	Caesium-137 Fallout radionuclide Soil erosion Geostatistics Model-based and design-based sampling China's Loess Plateau
ISSN号	0265-931X
DOI	10.1016/j.jenvrad.2014.12.007
通讯作者	Li, Y.
英文摘要	The Cs-137 technique for estimating net time-integrated soil redistribution is valuable for understanding the factors controlling soil redistribution by all processes. The literature on this technique is dominated by studies of individual fields and describes its typically time-consuming nature. We contend that the community making these studies has inappropriately assumed that many Cs-137 measurements are required and hence estimates of net soil redistribution can only be made at the field scale. Here, we support future studies of Cs-137-derived net soil redistribution to apply their often limited resources across scales of variation (field, catchment, region etc.) without compromising the quality of the estimates at any scale. We describe a hybrid, design-based and model-based, stratified random sampling design with composites to estimate the sampling variance and a cost model for fieldwork and laboratory measurements. Geostatistical mapping of net (1954-2012) soil redistribution as a case study on the Chinese Loess Plateau is compared with estimates for several other sampling designs popular in the literature. We demonstrate the cost-effectiveness of the hybrid design for spatial estimation of net soil redistribution. To demonstrate the limitations of current sampling approaches to cut across scales of variation, we extrapolate our estimate of net soil redistribution across the region, show that for the same resources, estimates from many fields could have been provided and would elucidate the cause of differences within and between regional estimates. We recommend that future studies evaluate carefully the sampling design to consider the opportunity to investigate Cs-137-derived net soil redistribution across scales of variation. (C) 2014 Elsevier Ltd. All rights reserved.
学科主题	Environmental Sciences
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000352173300015
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19765]
专题	农业环境与可持续发展研究所
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China 2.CSIRO Land & Water Natl Res Flagship, Canberra, ACT 2601, Australia
推荐引用方式 GB/T 7714	Li, Y.,Chappell, A.,Nyamdavaa, B.,et al. Cost-effective sampling of Cs-137-derived net soil redistribution: part 1-estimating the spatial mean across scales of variation[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,2015,141:97-105.
APA	Li, Y.,Chappell, A.,Nyamdavaa, B.,Yu, H.,Davaasuren, D.,&Zoljargal, K..(2015).Cost-effective sampling of Cs-137-derived net soil redistribution: part 1-estimating the spatial mean across scales of variation.JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,141,97-105.
MLA	Li, Y.,et al."Cost-effective sampling of Cs-137-derived net soil redistribution: part 1-estimating the spatial mean across scales of variation".JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 141(2015):97-105.