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Effects of sampling interval on spatial patterns and statistics of watershed nitrogen concentration

GIScience and Remote Sensing

By:
, , ,
DOI: 10.2747/1548-1603.46.2.172

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Abstract

This study investigates how spatial patterns and statistics of a 30 m resolution, model-simulated, watershed nitrogen concentration surface change with sampling intervals from 30 m to 600 m for every 30 m increase for the Little River Watershed (Georgia, USA). The results indicate that the mean, standard deviation, and variogram sills do not have consistent trends with increasing sampling intervals, whereas the variogram ranges remain constant. A sampling interval smaller than or equal to 90 m is necessary to build a representative variogram. The interpolation accuracy, clustering level, and total hot spot areas show decreasing trends approximating a logarithmic function. The trends correspond to the nitrogen variogram and start to level at a sampling interval of 360 m, which is therefore regarded as a critical spatial scale of the Little River Watershed. Copyright ?? 2009 by Bellwether Publishing, Ltd. All right reserved.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effects of sampling interval on spatial patterns and statistics of watershed nitrogen concentration
Series title:
GIScience and Remote Sensing
DOI:
10.2747/1548-1603.46.2.172
Volume
46
Issue:
2
Year Published:
2009
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
172
Last page:
186
Number of Pages:
15