Title :
How to improve the prediction accuracy of the ANN model to underground water content effectively
Author :
Hongwei Song ; Zhang, Yilong ; Yin, Xia ; Wang, Limin ; Wang, Wenzhong ; Xia, Fan
Author_Institution :
Inst. of Hydrogeology & Environ. Geol., CAGS, Zhengding, China
Abstract :
In this paper, Hetao plain as a testing ground f and a number of local agro-wells known as the proving prerequisite, use of Induced Polarization (IP) and resistivity sounding and other surface geophysical methods, adding the thickness of the aquifer and the rate of deviation in the relevance of water inflow artificial neural network (ANN) predictive model which based on the parameters of apparent resistivity, polarization rate, half-bad and the decay rate, etc. Then, build a new prediction model of underground water. Through the rules of mean-variance test shows that the accuracy of quantitative prediction of the water content has been greatly improved after adding new input neurons in the exploration area. The study has a good promotion value to the application of ANN forecasting techniques in hydrogeological exploration.
Keywords :
groundwater; hydrological techniques; neural nets; water resources; ANN forecasting techniques; China; Hetao plain; apparent resistivity; aquifer; decay rate; exploration area; hydrogeological exploration; induced polarization; input neurons; local agrowells; mean-variance test; polarization rate; prediction accuracy; resistivity sounding; surface geophysical methods; underground water content; water content; water inflow artificial neural network predictive model; Accuracy; Artificial neural networks; Conductivity; Geology; Mathematical model; Neurons; Predictive models; BP artificial neural network; mean square deviation; water inflow;
Conference_Titel :
Water Resource and Environmental Protection (ISWREP), 2011 International Symposium on
Conference_Location :
Xi´an
Print_ISBN :
978-1-61284-339-1
DOI :
10.1109/ISWREP.2011.5893016