Multi-scale variability of soil salinity in the Yellow River Delta

H. Wang; P. Gong; G. H. Liu

doi:10.1117/12.761866

25 July 2007 Multi-scale variability of soil salinity in the Yellow River Delta

H. Wang, P. Gong, G. H. Liu

Proceedings Volume 6753, Geoinformatics 2007: Geospatial Information Science; 67532M (2007) https://doi.org/10.1117/12.761866
Event: Geoinformatics 2007, 2007, Nanjing, China

Abstract

Analysis and interpretation of spatial variability of soil salinity is a keystone in site-specific farming. To better understand patters of multi-scale spatial variability in soil salinity, soil samples (30 to 40 cm depth) were collected with separation distances of 0.04, 0.2, 1 and 6 km in the Yellow River Delta of China. Laboratory measurements of soil salt content were also made from these samples (n = 239). Moran's I autocorrelation coefficient was computed at preselected lag distances and correlograms were plotted to examine trends in autocorrelation. Spatial autocorrelation was found at scales ranging from 0.7 km to more than 75 km, depending on the sampling scale considered. A correlation range in regional scale appeared to be associated with elevation height, while a shorter range in field scale was likely influenced by alternating land use/land cover or microtopography types. Moran's I correlogram calculated with salinity data from all of the sampling locations suggested spatial pattern detection for soil salinity can be achieved with a sampling interval of approximately 2 km or less. The magnitude and spatial patterns of soil salinity have implications for devising appropriate schemes to improve land productivity and design of soil sampling strategies in the Yellow River Delta.

Citation Download Citation

H. Wang, P. Gong, and G. H. Liu "Multi-scale variability of soil salinity in the Yellow River Delta", Proc. SPIE 6753, Geoinformatics 2007: Geospatial Information Science, 67532M (25 July 2007); https://doi.org/10.1117/12.761866

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available