# IMPORTANCE OF INPUT PARAMETER SELECTION FOR SYNTHETIC STREAMFLOW GENERATION OF DIFFERENT TIME STEP USING ANN TECHNIQUES

### Maya Rajnarayn Ray, Arup Kumar Sarma

#### Abstract

Streamflow time series is gaining importance in planning, management and operation of water resources system day by day. In order to plan a system in an optimal way, especially when sufficient historical data are not available, the only choice left is to generate synthetic streamflow. Artificial Neural Network (ANN) has been successfully used in the past for streamflow forecasting and monthly synthetic streamflow generation. The capability of ANN to generate synthetic series of river discharge averaged over different time steps with limited data has been investigated in the present study. While an ANN model with certain input parameters can generate a monthly averaged streamflow series efficiently, it fails to generate a series of smaller time steps with the same accuracy. The scope of improving efficiency of ANN in generating synthetic streamflow by using different combinations of input data has been analyzed. The developed models have been assessed through their application in the river Subansiri in India. Efficiency of the ANN models has been evaluated by comparing ANN generated series with the historical series and the series generated by Thomas-Fiering model on the basis of three statistical parameters- periodical mean, periodical standard deviation and skewness of the series. The results reveal that the periodical mean of the series generated by both Thomas –Fiering and ANN models is in good agreement with that of the historical series. However, periodical standard deviation and skewness coefficient of the series generated by Thomas–Fiering model are inferior to that of the series generated by ANN.

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#### Paper Citation

#### in Harvard Style

Rajnarayn Ray M. and Kumar Sarma A. (2011). **IMPORTANCE OF INPUT PARAMETER SELECTION FOR SYNTHETIC STREAMFLOW GENERATION OF DIFFERENT TIME STEP USING ANN TECHNIQUES** . In *Proceedings of the International Conference on Neural Computation Theory and Applications - Volume 1: NCTA, (IJCCI 2011)* ISBN 978-989-8425-84-3, pages 211-217. DOI: 10.5220/0003681802110217

#### in Bibtex Style

@conference{ncta11,

author={Maya Rajnarayn Ray and Arup Kumar Sarma},

title={IMPORTANCE OF INPUT PARAMETER SELECTION FOR SYNTHETIC STREAMFLOW GENERATION OF DIFFERENT TIME STEP USING ANN TECHNIQUES},

booktitle={Proceedings of the International Conference on Neural Computation Theory and Applications - Volume 1: NCTA, (IJCCI 2011)},

year={2011},

pages={211-217},

publisher={SciTePress},

organization={INSTICC},

doi={10.5220/0003681802110217},

isbn={978-989-8425-84-3},

}

#### in EndNote Style

TY - CONF

JO - Proceedings of the International Conference on Neural Computation Theory and Applications - Volume 1: NCTA, (IJCCI 2011)

TI - IMPORTANCE OF INPUT PARAMETER SELECTION FOR SYNTHETIC STREAMFLOW GENERATION OF DIFFERENT TIME STEP USING ANN TECHNIQUES

SN - 978-989-8425-84-3

AU - Rajnarayn Ray M.

AU - Kumar Sarma A.

PY - 2011

SP - 211

EP - 217

DO - 10.5220/0003681802110217