GIS and ANN-based spatial prediction of DOC in river networks: a case study in Dongjiang, Southern China
GIS and ANN-based spatial prediction of DOC in river networks: a case study in Dongjiang, Southern China
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基于 GIS 和 ANN 的河网 DOC 空间预测:以华南东江地区为例
DOI:
10.1007/s12665-012-2177-y
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发表时间:
2013-03
影响因子:
2.8
通讯作者:
Chen, Jingyi
中科院分区:
文献类型:
--
作者:
Fu, Yingchun;Zhao, Yaolong;Zhang, Yongrui;Guo, Taisheng;He, Ziwei;Chen, Jingyi
This paper investigates the use of an artificial neural network (ANN) model to predict dissolved organic carbon (DOC) in a river network and evaluates the impacts of watershed characteristics on stream DOC. Samples and relevant environmental variables were obtained from field sampling at 28 hydrological response units (HRUs) and a MODIS/SRTM DEM satellite image. HRUs can provide reliable spatial interpolation for filling data gaps and incorporate potential spatial correlation among observations in each ANN neuron. The process and results of neural network modeling were assessed by deterministic and statistical methods and spatial regression kriging. The spatial prediction results show that ANN, using improved back propagation algorithms of 7-15-1 architecture, was the optimal network, by which predictions maintained most of the original spatial variation and eliminated smoothing effects of RK. The sum of the relative contributions of four sensitive variables, including soil organic carbon density, geographic longitude, surface runoff and Chlain river water, was >75 %. A minor prediction error of ~6 % was found in HRUs of open shrublands, but HRUs of urban and croplands had an error of 24–30 %. This pattern exemplifies anthropogenic impacts in urban areas on stream DOC and agricultural activities in croplands. The usefulness of ANN modeling-based GIS in this study is demonstrated by depiction of spatial variation of stream DOC and indicates the benefits of understanding sensitive factors for watershed impact assessments.
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DOI:
10.1007/bf02083653
发表时间:
1996-05
期刊:
Mathematical Geology
影响因子:
--
作者:
R. Olea;V. Pawlowsky
通讯作者:
R. Olea;V. Pawlowsky
DOI:
10.1007/978-0-85729-299-5_8
发表时间:
2011
期刊:
--
影响因子:
--
作者:
W. Ertel
通讯作者:
W. Ertel
DOI:
10.1109/is.2002.1044229
发表时间:
2002-12
期刊:
Proceedings First International IEEE Symposium Intelligent Systems
影响因子:
--
作者:
G. Dimirovski;Yuanwei Jing
通讯作者:
G. Dimirovski;Yuanwei Jing
影响因子:
--
作者:
Shurong Zhang;Xixi Lu;D. Higgitt;C. Chen;Huiguo Sun;Jingtai Han
通讯作者:
Shurong Zhang;Xixi Lu;D. Higgitt;C. Chen;Huiguo Sun;Jingtai Han
影响因子:
3
作者:
Xuchen Wang;Robert F. Chen;G. Gardner
通讯作者:
Xuchen Wang;Robert F. Chen;G. Gardner